*Reviews*
I decided to dig up some of my old car reviews and post them here. I have also reviewed suspension changes and different tires on my car.
Aug. '07: BMW Ultimate Drive: 335i Convertible and X5 3.0si
Dec. '05: 2005 Toyota Celica GT
Dec. '05: 2006 Chevrolet HHR
Oct. '05: 2005 Lotus Elise
Sep. '05: BMW Ultimate Drive: X3 3.0i/2.5i, 325i, 530i, 750i, 645Ci
Aug. '05: 2005 Hyundai Sonata, 2004 and 2005 Ford Focus (and other rental cars)
Apr. '05: 200x Ford GT (track)
Apr. '05: 200x Ford Falcon Fairmont Ghia
Apr. '05: 2006 BMW 3 Series
Apr. '05: 2005 Chevrolet Corvette Z51
Feb. '05: 2005 Ford Mustang GT vs. 2004 Ford Mustang SVT Cobra
Dec. '04: 2005 Ford GT
Nov. '04: 2005 Mercedes-Benz ML350
Oct. '04: 2004 Ford Mustang SVT Cobra
Oct. '04: 2001 BMW M5
Oct. '04: 2005 Chevrolet Corvette
Aug. '04: 2004 VW Golf R32
Jun. '04: 2004 BMW 325Ci Convertible
Jun. '04: 2004 BMW Z4 3.0i
Jun. '04: 2004 BMW X3 3.0i
Jun. '04: 2001 BMW 330Ci
May '04: 2004 Subaru WRX STi
May '04: 2002 BMW M3 SMG
Mar. '04: 2004 Mazda 6i
Mar. '04: Update of the DSC-X traction/stability control on the 2003 BMW 325xi Touring Wagon
Nov. '03: 2003 BMW 325xi Touring Wagon
Jul. '03: 2000 BMW 328Ci Coupe
Mar. '03: 2003 Mazda 6, Miata and Protégé5
Jan. '03: 2003 Audi A4 1.8T Quattro
Jan. '03: 2003 Jeep Liberty
Oct. '02: 2003 Mercedes-Benz E320 and Mercedes-Benz E500
Jan. '02: 1998 Toyota RAV4 Mini-SUV
Feb. '00: 2000 Chrysler 300M
Sep. '98: 1999 BMW 328i Sedan, 1999 BMW 323i Cabriolet, 1999 BMW 540i Sedan
BMW Ultimate Drive: 335i Convertible and X5 3.0si
335i Convertible
Driving this new
convertible was a little different experience from what I expected -- a tire
screeching, rough riding event. Pulling out of the parking lot into the street,
the first mental notes included heavy steering and a slightly shaky structure.
And then, of course, accelerating into the traffic (yes, it was around rush
hour), the twin-turbo engine came alive, even though I repeatedly found the
exhaust note to be too muted and almost simulated, as if someone was in a sound
studio playing with an equalization scheme to subdue very specific frequency
bands. In other words, it sounds pretty good, but somewhat unnatural and not
like anything I've heard before. But that's a minor point. This car takes off
and accelerates so linearly that you don't notice the effort or the speed. The
engine never screams or explodes; it just pulls. As a result it lacks the
visceral experience of any M engine but is hard to fault otherwise. Forcing the
automatic transmission in top gear reminds you that this is not the torquey
muscle car, but it really doesn't matter since the other gears are so
accessible. This new automatic transmission from ZF is probably the most
responsive one I've been in. I still miss the abrupt, lift throttle engine
braking of a true manual transmission, but the upshifts and downshifts are
almost as smooth as VW and Audi's DSG dual clutch boxes. Comparing again to
another M feature, the loved-and-hated SMG gearbox, this automatic is not as
sharp or fast, but neither does it make you think you are about to tear your
drivetrain apart the way the SMG would under load. One thing I did not quite
understand was when hitting the paddle shifters would keep you in manual mode
and when it'd default back to automatic mode after a few seconds. Sometimes I
was caught off guard that I was still in manual mode, while at other times, I
was surprised by a shift when I thought it was already in manual mode.
Perhaps the most amazing quality is the ride, considering this was a sport
package car riding on run flat 18" tires. Despite the somewhat shaky structure
(compared to a sedan or coupe), both the primary (low frequency) ride and
secondary harshness were very minimal. Even over scalloped pavement, it was more
confortable, less abrupt and less head toss than a non-sport version of the
previous E46 generation, which means it's miles ahead of my car's ride. Because
the route was through mostly straight city streets with low speed limits and
even slower zones, I did not get to push the cornering or braking envelopes at
all. But what it feels like is that it still has decent roll stiffness, although
the steering and yaw responses feel a bit slow at city speeds. Perhaps Active
Steering would liven things up. If anything, I think this car could use an even
stiffer suspension setup so that the hard acceleration doesn't make it squat as
much as it does.
Interestingly, there was more than enough grip from the tires which are another
variant of the Bridgestone RE050A's that I'm running on my own car. Even brake
torquing from a stop with traction control disabled, wheelspin was minimal. Out
of corners, the brakes manage the slight wheelspin, and then the car takes off.
I figure much higher cornering forces are required before the inside wheelspin
that's often seen on the promotional videos, become an issue. So this car is
definitely very tractable in fair weather.
The interior was very utilitarian, so much so that I didn't play with it much at
all. Besides, I could not see the radio's display through my polarized
sunglasses unless I tilted my head 45 degrees to the side. The HVAC's unit,
which is mounted lower, shows up fine though. Most of my time was spent
exploring the various ranges of this new engine, but never once did I find a
hint of turbo lag or roughness. Its smoothness, the transmission's seamlessness
and the amazing ride quality makes this car, well, too smooth. I think it just
needs a little more edginess to be really fun. It is also a bit too fast to
safely use the power regularly. I actually think driving might be more rewarding
with the 328i....
X5 3.0si
I thought I'd try something very different for the next car. I don't even
remember if I've driven the first generation X5, so I didn't really have any
particular expectations. This particular sample was an iDrive car but without
the extra chassis controls. The electronic shifter works fine and is easy to get
used to. Going down 40 hp and up 1000 pounds from the 335i, this vehicle felt
quite slow. But what surprised me was how much more poorly it rode on the same
bumpy sections that the convertible had no problems with. Plus, tire noise was
an issue. Maybe the open air of the convertible just covered all that up, but
this X5 is otherwise a quiet car. Once again I couldn't push this car much but
could tell in a couple of instances that even these all season tires had ample
grip, much more so than I had expected from an SUV of this size. The steering
felt a little slow once again though.
The drive in the X5 is pretty uneventful, so I spent a lot of time trying to
crack the iDrive functions. It's actually not too bad, and I think I went
through most of the screens and options. Seeing all the customizable features
(even without the navigation DVD or Bluetooth enabled) makes me realize it's
really a computer on wheels. Two of my HVAC wants for years came true. You can
customize how much air is distributed where, and in auto mode, you have three
flow speed choices (soft, medium and intensive) which is helpful when you want
everything still automated but prefer higher airflow (like I do) or lower
airflow (like my dad does). What I don't think is necessary, and this is perhaps
the core of iDrive, is the haptic force feedback of the dial. The N/S/E/W
directions, the pushbutton and the extra menu button are definitely welcome, but
the display itself is clear enough when you've reached the scroll limits;
increasing the dial's force feedback just makes it feel tacky. One thing I
discovered through the iDrive menu was that the units were set to British
gallons. No wonder the fuel economy displays looked much better than I had
expected.
Another interesting touch is the extra ring around the speedometer which I
thought was just for depth and artistry. It turns out that there's another dial
that comes into view when you turn on cruise control, and it points to your set
speed. This is entirely superfluous especially since the digital display already
tells you exactly what speed you're set at, but the dial coming in and out of
view is kind of neat. The cruise control, when you go in the decel direction,
actually applies the brakes, which I'm not quite used to. But it's something
that I could probably come to appreciate.
Even though this car didn't have the active anti-roll bars, the technical
innovations show. The parking brake is not only electronic, but I believe it
actually activates the booster and then holds the pressure
electro-hydraulically. You can have it apply by pulling up on the lever and
holding it while you're rolling or even on the accelerator, and it'll try to
slow you down, sometimes too much. While it's doing so, the brake pedal becomes
stiff (isolated from the wheels). Let go, and the parking brake will release
entirely, unless you're stopped, in which case it'll hold, presumably with all
four wheels until you push down to release (with foot brake applied). I guess
this all makes sense to eliminate the extra parking brake handle and cables. I
wonder what happens if you really need it as an emergency brake when the
hydraulics or power systems fail though.... Also, quite a few of the buttons and
controls had a split second delay before anything happened though (which got me
confused as to whether I had requested the command or not), almost as if the CAN
bus was being overloaded.
The seats seemed comfortable with too many adjustments, including headrest
extensions that you can fold toward your head to give side support, like on some
airplanes to hold your head up when you fall asleep. There's also the seat
motion/massager which, to me, moves around too much. Perhaps that's a custom
setting in the iDrive that I didn't find. It also looks like it's possible to
turn on both the seat heater and the seat cooling fan, but I didn't leave it
long enough in that setting to figure out what it was really doing in that mode.
Even though it's a better driving vehicle than most SUV's, in the end, nothing
really stood out in this X5 to me except the interior.
My rental car for the last two weeks in Phoenix was a 2005 Toyota Celica GT. I had not paid much attention to this vehicle before and wasn't particularly excited about getting it after I had asked for a Mazda3, but I thought I'd give it a try. But overall, I was pleasantly surprised. I expected the car to be mostly show, but once I sat in it, something felt comfortable. Within a few seconds, while pulling out of the parking lot, I knew it was going to be some fun. It's hard to describe, but it's a connected car. The last Toyotas I've driven--Scion xB, Celica, Camry--had made me lose faith in Toyota, but this Celica is different.
The steering is most memorable for its quick ratio and a very small torque deadband. And the vehicle gains lateral acceleration before much steering torque and with minimal initial roll, meaning that it wants to carve like a go kart, relative to most other vehicles I've been driving anyway. Overall effort is among the highest of any modern car I've driven, which is totally opposite from the other Toyotas. And torque steer, about which I'm very critical, is truly minimal. The suspension is quite firm and well damped. It might still be a bit too much over the broken Michigan pavement...I have doubts about its pitch control, but it certainly works in Phoenix roads. The rear is definitely stiffer and harsher than the front, but somehow the vehicle can fly over speedbumps without much complaint. Except if turning into a ramped entrance under light braking, at which point the ABS buzzes strangely. Which brings me to the brakes, another pleasant surprise. Very little dead travel and just the right amount of grabbiness....
I didn't get to go on enough curvy roads to give a comprehensive impression of the handling, but it certainly feels like it wants to carve corners. I did get a chance to do some gravel driving at our proving ground's parking lot though. I have to say I've never had this much fun in a front wheel drive car. Turn in, pause a second for the front tires to grab, and then the rear will step out...much more than expected. Pull the parking brake (which is very effective since the rears are drums), and the tail will really step out. Strangely, step on the brake during this as well, and, again, the ABS goes crazy, and the car goes round almost too quickly to catch...and this is starting from only 25 mph!
The engine and transmission are not as entertaining. The bottom end is pretty dead, the midrange is acceptable, and the top end is very buzzy. This engine needs a 5th gear. The transmission is fine when driven mildly, but when driven consistently with the rest of the car's character, it can be very abrupt. A 2-1 downshift is just brutal, especially in a corner...the only time when you feel the torque steer, and no manual downshift or upshift is smooth. Around town, I found myself liking to lock the car into 2nd and cruise around in the 3-5k RPM range. Fortunately the engine and transmission can be "fixed" by choosing the GT-S and a manual transmission :)
The half worn Bridgestone RE-92s generate a ton of noise on coarse pavement, no help from the hatchback design. But then, they are utterly quiet on smooth asphalt!
The instrument cluster, with its digital and analog mix is very legible and effective, although the yellow lighting at night is too pale and needs a little more red to it. The front left headlight on this car was way out of whack. I found the bulb not to be installed properly and reseated it, but it wasn't that much better. It took about 10 minutes for me to get the bulb out, with the instruction manual! I remember my dad's old RAV4 having lighting problems too where the socket for the bulb kind of broke so the bulb hung down. Is this a Toyota problem?
The radio is OK, the A/C works (even though the vents are way in front and impossible to reach without bending forward) and, well, there's not that much more to this car, which is just the way I like it. Just enough things to make it livable :) Unfortunately the rear visibility, with the thick B and C pillars, integrated headrests, the near horizontal rear window and a rear wing makes it hard to see out the rear; I think shorter people would really have trouble. It's also impossible to see the leading edge of the vehicle, which can be annoying since it has a large front overhang and low front fascia. However, I noticed that this car does turn heads, even though mine is clothed in innocent white.
Overall, the Celica was a more pleasant experience than I had expected. It's hard to believe that this is from the same manufacturer as some of the other Toyotas which are, in comparison, soul-less.
We have this vehicle as a near competitor of the mini-SUV vehicle I am working on. Whereas I happily zip around our prototype--in a way it's one of the most fun Fords I think--going around the cul-de-sac type turnaround that we have on our grounds is no fun in this Chevy, even at low speeds. It just does not feel natural. Its electric power steering is so strangely tuned that its efforts change inexplicably and lacks feel at any speed. To its credit, the transmission shifts smoothly though, and because the 2.2L Ecotec engine is so smooth and makes no noise, it will run to redline all day long, and you won't know it (because it feels like it's hardly moving). But at part throttle, the exhaust is very droning and annoying. The brakes have too much initial travel and don't grab. And although the car is smooth riding, there's a persistent vibration even on the smoothest of roads. But mind you, this car is otherwise quiet. As such, it certainly feels like it's more expensive than a $15k car, especially with the satellite radio, chrome bezels, etc. And interior room, given its shape, is great. I think this is a car that I'd recommend to my grandparents or another old relative. It's slow and smooth and, well, an utter bore to drive.
I finally had a chance to test drive one of my dream cars, the Lotus Elise. I attended the Elise Experience at the Autobahn Country Club in Illinois, which was a track and skills day organized by Fox Valley Motorcars and with former Lotus test drivers/engineers as instructors. The Market Manager for the US was also present. I probably would have enjoyed it more if I had not suffered from a recent back injury, but thank God that I was barely well enough to participate nevertheless (hopping into and out of the Elise and the high G loads didn't help recovery). The events of the day included a no-ABS threshold braking / brake & turn exercise, an unevenly spaced "slalom," an understeer/oversteer skidpad (where I won an award!) and track time at the site's North Circuit.
The Impressions Aside from Driving: I now see the Elise as sort of like a dream/ideal woman. She seems to have all the right qualities, and after getting to know her, you still admire her but you start to think she may just be a bit too much for you and makes you wonder whether what you really want and what you need align or not.... But I can't pinpoint exactly what was wrong. The interior did bother me more than I had expected though, which was surprising since I normally don't pay too much attention to it. The instrument cluster, particularly the telltales and secondary information seemed a bit difficult to read. It's also the first time I've seen a non-linear tachometer (with basically no resolution under 3000 RPM). Ingress/egress was certainly interesting.
The Technical Aside: The Market Manager, when asked about the new available Torsen differential, was of the view that it was offered because of the US market pressure. He mentioned that it was suitable for very specific types of driving, like autocross, but that the vehicle lost much of its fluidity in other driving. I asked if felt the difference only in hard driving or in milder scenarios such as understeer turn-in, and he said that he noticed it most under lift throttle conditions, even in a straight line, the mechanics behind which I do not fully understand. He says the traction control is offered mainly because of the special dynamics associated with the new differential.
Braking Exercise (non-sport Elise): This would be my very first time in an Elise, and I had to learn the braking limits right away. I checked out the static pedal feel, and it felt soft in that the pedal didn't get appreciably harder with travel. I thought I would have difficulty modulating (since I'm used to force feedback), but it was nevertheless relatively easy. One end of the exercise was to stop as quickly as possible with minimal wheel lockup. The other end, if done correctly, involved bringing the car to a near stop, at which point you'd have to swerve to avoid a set of cones, causing inside front wheel lockup, releasing enough pressure to negotiate the turn, and then coming to a full stop. It took a couple times to figure out the start of the braking zone, but after that, it was relatively easy. On my last try, I was surprised with not front wheel lockup but rear wheel lockup. The instructor said that, in this exercise with the repeated stops, the rear brake temps get higher than the fronts, causing this phenomenon occasionally. Because we had to do some 3 point turns to restage for this exercise, I noticed how the non-power assisted steering could get annoying...particularly because I was struggling with my bad back. Slalom Exercise (sport Elise with Stage 2 exhaust): This was different from a standard slalom in that we didn't snake around a central line of cones. Instead, there were pairs of cones marking "gates" to go through. A very helpful instructor's tip was to look at the outside cone; I would have naturally looked at the inside cone, causing me to drive a tighter line than necessary. The Elise was fun here because the course was set up with varying inter-gate distances, allowing us to feather the throttle on and off and making use of steering with the throttle (to which the Elise is very sensitive). But the grip level was high...I never really felt the Elise get eerily loose, but I was focusing on smoothness and technique as opposed to driving at the limit.
Skipdad Exercise (non-sport Elise): I thought this would be difficult with the car's natural tendency to rotate. The circle was on a slight incline, with the uphill side wet. The rear tires were replaced with the skinny fronts to give the car more oversteer. Surprisingly, the car behaved beautifully to me; I found it to be the one of the easiest car to handle lift throttle oversteer with. As you increased speeds, you could feel the front start to lighten and wash out, and then right upon lift throttle, the rear would slide around smoothly, and unwinding the steering wheel corrected this tendency immediately, effectively and almost naturally. I just could not lose it entirely on the skidpad. I asked the instructor how to get more drama, and he told me to keep delaying my corrective steering so that I could attain a larger "drift," in hopes of a spin out, but I never really had to use opposite lock. I guess as a result, I was given the skidpad award for my sensitive to vehicle steering and natural knack for oversteer correction....
Track Exercise (sport Elise with Stage 2 exhaust): We were given a couple of sessions with the instructor by our side. Some random notes: There isn't enough torque, even in the tightest 2nd gear corner to powerslide the car, which was a bit surprising but comforting and allowed me to feel the full output of the engine throughout the rev range. The engine loves to rev, and the variable valve timing was largely unintrusive. I missed the 3-2 shift a couple of times (went to 4th). Rev matching and clutch modulation are surprisingly easy. By far the biggest difference with a "regular" car is in the steering. Efforts build very significantly under lateral loading, and you feel so much information transmitted through. I never felt I truly reached the limit where the front would wash out though. I had reached what I felt comfortable (with my skills and with the loads on my back), but there was lots more grip left. The car never really felt loose, even under trail braking. Even when the instructor did the hot laps (smooth but fast), I could see he was fighting with some understeer, which was surprising to me.
Summary: I wish I had been able to drive this car on normal, bumpy roads. The chassis did not seem unusually stiff, firm or harsh, but it's really hard to tell what it would be like on bad roads when coupled with the short wheelbase. But other than the 3-2 shift that required more effort than I had expected and a brake pedal that was lighter statically than anticipated, I loved the dynamics, as expected. I would have liked to put more sharp inputs to evaluate the transient (albeit partly irrelevant) response. If there's any "complaint," it's the heavier and telepathic steering, but that's more me than the car. What I mean is, the steering overwhelmed me a bit, making it the only thing that would make this car not viable as my almost-daily driver.
BMW Ultimate Drive: X3 3.0i/2.5i, 325i, 530i, 750i, 645Ci
It's my 3rd time participating in the BMW/Susan G. Komen Ultimate Drive for breast cancer research. I was able to make reservations for two X3's, but I scouted the other cars out for the one for a manual transmission. Unfortunately, there were none...looks like BMW learned not to provide any manual or M cars :( Most of these cars have around 25000 miles on them, and the route was a "square" adding up to a 10 mile road. Very few curves or high speed stretches, but lots of good road input (as in bad road surfaces).
X3 3.0i Sport
The interior quality seems to have improved slightly from last year, but there
are still annoying rattles. The ride quality, just as the magazines say, was
really terrible, both over the concrete slabs and the scalloped roads: overly
controlled by damping even though there seems to be sufficient travel. I'm
surprised BMW is not fixing this despite the complaints. On my
first hard braking application, I felt what was like a pedal creak, a slight
noise and vibration that was much faster and softer than ABS. I thought wow, ABS
modulation has become so subtle and near-unnoticeable...until I really got into
it another time. I think the slight creak/vibration is probably the EBD doing
minor adjustments then? I got the DSC stability control light flashing on the
course's only set of curves even though I could feel no intervention. Road noise
was hideous on all surfaces and particularly when braking. The grip of AWD BMW's
have always amazed me. Mash the throttle (or even brake torque it) from any right
hander from a stop, and it'll just haul ahead with no hint of wheelspin, torque
steer or significant sideslip. This X3 3.0i was no exception.
325i Sport
Next up came the 325i with sport package. What a sweet motor. It just zings and sings!
(The tone isn't that exciting, but this engine loves to rev even though it's a
bit dead down low.) I wish the 330i were on this drive.... BMW powertrain soul
is finally back after it went down the flexible, broad-torque route since the
mid-1990's. Other than the pushbutton starter which was different, the other
thing I noticed was when I quickly hit the steering rack stop while backing out.
"Oh, this must have the active steering," I told myself. Yes, it is extremely
quick at low speeds, but if you're just cranking the wheel at low speeds,
there's a bunch of funny noises, some of which you feel as quivers through the
steering wheel. It makes it a lower quality feel, but it seems to work for the
most part on the road, except for what feels like delayed force feedback. The
electronically timed turn-signals also take a bit of getting used to. There were
also other whistles and noises at standstill that I don't think would have made
it through even for the Explorer that I am working on. Again, road noise was
more than expected. Although the spirit of the 3 series lives on in this car,
its character has changed somewhat. The steering is quicker and tighter overall
and, somewhat disappointingly, it seems to have lost some of its isolation in
terms of hard inputs, almost as if the tires themselves are underdamped or the
structure is less damped. This just feels different from the outgoing 3 series,
Z3 and X3. I guess that's understandable given that it has a new front and rear
suspension. The suspension tuning is also a bit different with less rebound damping and
making better use of available travel than what my memory tells me.
X3 2.5i
This car was available next. It felt rather rather anemic, but hey, the ride quality
is probably where it should be. If I got an X3, I would not get the sport
suspension/tire setup.... The brakes on this car were particularly touchy; very
low effort for initial decel. Everything else is, well, as expected. One thing
is certain. This car makes you forget you're in an SUV (except for the greater
visibility).
530i Sport
Yes! Somehow this car and I connected, although I can't explain it. It still has
a little quirky active steering, but maybe I'm getting used to it. Force buildup
seems a bit delayed. I wonder if it's because I'm giving it very rapid inputs
that you typically won't do in normal driving. The trans
calibration seems to work well. The whole car not quite as eager or lively as the new 3 series, but it
seems a little more obedient and with much better NVH control. Yet, there is
still an after-ring on the rippled roads that did not seem to be around in older
BMW's. Does the high aluminum content in the unsprung parts have something to do
with it? Nevertheless, I love the turn-in on this car. The sideslip phasing is just nice, with a
bit of a give from the rear tires (barely noticeable) to make the car rotate, but no wallowy,
squirmy feel. Unless you're really paying attention to the nuances, the car just
feels like it will slice zig-zags along the road. The sliding armrest is a little annoying because pulling back the parkbrake pushes the armrest out of the way.... This car, along with the new 6,
have a very pretty melody to let you know your keys are still in the ignition if
you open the door.
Pulling it back into the parking spot surprised me because the brakes felt like
they suddenly grabbed and the steering suddenly quickened up.
750i Sport
The classical music that the previous driver put on put me in a totally
different mood. I spent most of the first few minutes playing with the controls (including iDrive)
as opposed to driving it. Finally, road noise from the cheaper 3 and 5 series is gone, although wind noise is very evident if you
don't close the moonroof's sunshade. The steering seems sooo slow, especially on
turn-in. It's good that the car does not feel big, but it's almost as if it
doesn't really want to turn-in. However, this is the first car of the day where power
oversteer out of a corner is easily attained even though I had to go through the iDrive to turn off the DSC and DTC. The annoying thing is that even with the
transmission in manual mode, once you start lighting up the rears in a corner,
it'll shift into 2nd, which does a good job of substituting for the traction
control which I wanted off! :( Surprisingly, the throttle and transmission calibration,
when driven hard is very weird. In a forced low gear at high RPM's, the throttle is way
too touchy, especially when combined with a delayed rubber-band effect in the
driveline. Shifting through the gears at a stoplight also puts thunks through
the body. But this car is ultrasmooth when driven mildly. It's almost as if the
development guys thought it was unnecessary to tune out the bugs for spirited
driving, since most people would not be pushing this car as hard anyway....
645Ci Convertible
Sport
The last car of the day for me was the 645Ci Convertible. This car finally had
enough power to make it fun, but, yawn...it's a cruiser, unfortunately, not a
sports car. It's not
exciting in ways other than straightline acceleration. The suspension is way softer than the other cars (other
than the 750i) so the hard impacts are less noticeable, but the body quivers
instead. Everytime I drive a convertible, I am surprised at how much difference there is.
Maybe I'd like the coupe, but if I wanted a fun convertible, I'd use the money
and take two Z4's anyday. Conveniently, a Z4 3.0i was following me, and it
appeared to be able to keep up easily, right off the line at least. And why did
the engine bounce off the rev limiter and then shift after a split second?!
Overall, I think BMW is growing up and offering more stuff for more people, whereas I am not growing up, at least not with cars. I'm looking for a car that listens and plays with you. I'd rather have one that complains occasionally and messes up sometimes when you're not quite careful but brings a smile to your face at other times, not one that is Miss submissive and do-it-all :) Next weekend is Grattan track school for me...I have a feeling my car in its current state is going to be a bit of a handful (loose) on the higher speed corners...
2005 Hyundai Sonata, 2004 and 2005 Ford Focus, and other rental cars
I had written most of this a long time ago but never sent it out... Most of my work rental cars were the Mercury Sable, Mazda 6i and the Hyundai Sonata V6. The Sable was not memorable other than what feels like a lot of lateral compliance from the tires or rear suspension (similar to when I had coilovers with Yokohama ES100 tires); the Mazda 6 has steering that's way too light in my opinion but could still be driven spiritedly with fun, and the turn-in and yaw gain was much better on this 4 cylinder with 16" steel wheels than my friend's sport hatchback which felt out of phase and a front that would want to tuck under.
Hyundai Sonata V6 (2005):
I spent the most time with the Sonata and actually found it to be quite memorable. The engine is dead down low but comes to live in the midrange and up which means I always have to reduce throttle significantly as the speed picks up to maintain a constant rate of acceleration. The manumatic works pretty well...it will actually let you start in 2nd gear unlike some others, and it won't downshift with a kickdown, which is my preferred mode of operation. The brakes need work. It is extremely light in the beginning and then starts to bite without a change in feedback force. As a result, it took me quite a while to "memorize" how much pedal travel I would need as I could not rely on the force feedback. But then once it grabs, you need quite a bit more effort to get a hard stop. I was trying it out on a high mu surface and was amazed how much effort I needed to apply to get the wheels to lock up. And when I finally did, it was the rears that locked first?! I do not know of any other car that does that.
The handling is a mixed bag. I like it but only because it's a good "training car." Even in mild cornering (0.2 G or so), you can feel the car change line as you get on and off the throttle (such as an on ramp). And although it's still steady state understeer, the rear would actually swing out significantly if you lift. Even more amazingly, once you touch the brakes, the rear would come around even more. Typically I like some oversteer on lift throttle but expect the compliances and brake distribution to cause understeer on brake apply for safety reasons. So this is not the car I would want for my grandparents, for example, even though it's fun and predictable. The ride feels just about right to me, but in the slaloms, this car could use a lot more damping as it feels like it wants to get tail happy on each turn. Coupled with the lift throttle and brake response, this is not a car that I would want to do an emergency manueuver in! Torque steer is well managed (except when you get single wheel hop in corners!) although the feel is too simulated for me, coming more from the geometry than from the road input.
The HVAC is fully automatic, which is a bit of a pleasant surprise, and it works quite well, clearly indicating what distribution, circulation and A/C mode it's in. The stereo actually uses a power antenna which kind of delays reception until the antenna is at least slightly up. Ergonomically, all I can say is that it's weird. I find that I sit too high (and the two height adjustments pivot around strange axes), my knees are close to the steering column, and yet I still can't get the steering wheel close enough.
Ford Focus (2004 and 2005):
I got tired of getting the same mid-sized cars and so decided to do a compact instead (even though it's only about $2 less). I don't actually have that much to say about this car because I like it as a whole. The powertrain NVH is a bit rough, and I wish it had more top end, but the ride and handling are really pretty good. The tires lack ultimate grip, but the handling balance, precision and predictability make it much more fun to drive than any of my other rental cars. Sensitivity to throttle, braking and steering inputs is just about right. The steering is a bit heavy for me, especially on center, but that's better than being too light. Brake feel is grabby enough yet easily modulated and firm too. My friend at work did the tuning for the 2005, and, yes, it is noticeably better :)
This is the 550 hp mid-engined supercar formerly known as the GT40 (http://www.fordvehicles.com/fordgt) . I got a chance to drive this as they needed drivers to drive the car relatively briskly/hard on an autocross like course to prove out some new parts. It turns out that I'm certified for this type of driving, and the track happens to be the same one that I did the same my certification on, except that was in the wet and with cars with much less power. No street time in this car although I wish I had since I find I learn a lot about the car on the streets, but of course I'm ecstatic about being able to drive this car on a "track!" First, it's kind of cool that, as long as the door is open, you can put on your helmet after you've sat down.... This is probably the only ergonomically nice thing about part of the roof being part of the door :) However, after the drive, the top of my red helmet was all scuffed up due to the lack of headroom in this car (can't imagine what the 6' + people experience) and also because this car had no headliner. So I had to sit a bit more reclined than I would like to maximize the headroom. Fortunately the steering wheel tilts and telescopes. And even though my head is as high as it can be, visibility is still not that great, which makes it a little more challenging navigating around short cones. And rear visibility is pretty much limited to a nice view of the supercharger pulley :) The pedals are a bit too far to the right for my taste, but you soon forget about that so that means it can't be that far off.
The course was done all in 2nd gear (as instructed) although I think I would have liked 1st in some of the corners. Yes, that means I found it a bit slow! I can't believe this...I must be spoiled now. Well, the motor is very linear, but the course, being designed for use in the wet, was a bit too tight for a car of this size, and 1st would have been fun to rotate the rear, but it probably would have been difficult to drive too. As others commented, this particular old, beat up prototype with tires that were nearly gone by the time I drove, understeered. In fact, in the tight corners, it understeers even more than my car, which was a bit of a disappointment. On the slightly faster corners, it wasn't as bad, partly because there was enough torque to loosen up the rear. Where I really found this car to be a blast was in the transitions and slalom section (which we were told to skip, but I just had too much fun in it). The car really rotates and responds faster than I have ever experienced. A few times I thought I was way too late to turn in, but the car still co-operated. I guess that comes partly from the mid-engined nature of the car. What I found also was that the car's balance was extremely sensitive to throttle position. Whereas most cars would understeer pretty heavily if you went into a slalom slightly on the gas, I felt that this car needed some throttle just to plant the rear...unless I was late in which case closed throttle would quicken up the reaction even more, but then I'd need to get back on the gas slightly afterwards to prevent the car from overrotating. Overall, it was a blast, even though I think I would still prefer a smaller, lighter car. Power oversteer was amazingly easy to catch (and also maintain), which is a nice surprise from some of the cars I've driven recently :)
The brakes are really very strong, and because the car is so tied down, it feels particularly confident under braking, even though I personally would like an even harder pedal. The brakes slow the car down so quickly that I often feel I have slowed a bit too much for the turn whereas I'd rather have carried some brake into the turn to help the front end stick (since this car was understeering in steady state). I triggered the ABS numerous times, but I never quite figured out whether that slight uneasiness in the front was the ABS or something else. It almost felt like the front suspension was binding a bit or too hard to absorb the minor disturbances under hard braking. Not sure....
200x Ford Falcon Fairmont Ghia
This is an Australian (right hand drive) large family sedan, except that this one is fitted with a 5.4L modular 3 valve/cylinder V8. I got to drive this car over the weekend because this is a poolcar for my housemate's department...he works for Ford Powertrain. So I'll start with the engine...which is very smooth in power delivery and NVH...soooo quiet. The idle right after start and on revving just over idle in neutral is a little unstable though. In neutral, the highest that one can rev is 3000 rpm. In hard acceleration, the manumatic fuelcut is around 5500 rpm, and once you execute the upshift, the throttle opens up again and you get this surge as you get a bunch more torque...interesting feeling. There's enough torque and a high enough stall speed for the rear tires to chirp for a second or two when launching.
Ride wise, this car is quite good for bounce/pitch and also secondary impacts. Everything feels nicely rounded. Some aftershake shows that the structure is still not quite there, but Michigan roads really point out this type of weak spot. The Goodyear Eagle RS-A tires give a nice ride, but transmit a lot of audio feedback of the expansion strips that you don't even feel...you just hear it, especially from the rear, probably a result of the solid mounted subframe? By the way, this car uses the trailing blade suspension that was supposed to be common with the new Mustang until the latter switched to solid axle :( Overall, the car feels very undersprung and slightly underdamped. In other words, even though it's fast in a straight line, it's not very confidence inspiring in the corners; the outside front just feels like it's tucking under. I started getting used to it, but still don't like it. I think it's part geometry, part the low rates and part the tires. And because there's a lot of body motion, you really feel the car change direction under throttle on and off, not just from the tire slip angles but from the roll steer geometry. Didn't get to push this car hard in steady state corners, but this car can really get tail happy, not really under power, but under closed throttle snappy transitions! This car is also difficult to accelerate smoothly if you want to do it briskly because the transmission gets a bit confused on slight changes in throttle, and the soft springing makes the car pitch :( One nice feature of the transmission is that once you put it into manual/sport mode, it downshifts one gear if you are already in 4th, so it's easy to do a slight engine braking.
A thoughtful touch that most people probably won't even care about is the parking brake...how it beeps if you apply it while driving (as most modern cars do), but if you do it a second time, it doesn't beep anymore...which suggests to me that the programmers expect you to do some parking brake turns :) Speaking of brakes, I think the feel is quite good, except that I really couldn't evaluate it because this car has one or more awfully warped rotors noticeable when braking at any speed and downright scary when above 40 mph, and you're trying to do anything more than regular light braking!
Misc stuff: For some reason, this car not only lets you go into reverse without the brake on, but you don't even need to press the release lever on the gearshift! So you can knock the lever from park all the way to drive at any time?! If you hold the driver's side window button down for a while, the power doesn't cut; The relay just keeps clicking. The HVAC and audio system share the same color LCD display, except that it goes blank within about 2 seconds of idle, so I can never check the status of the HVAC or CD track without doing something else to wake it up. Maybe there is a special config feature. The headrests' highest position is about one inch off the top of the seat?!
Some quirks with driving a right hand
drive car (especially on streets designed for left hand drive):
You can't get the ticket out of parking ticket dispenser, and you can't pay the
cashier...
But you can throw a cup of ice-cream into a curbside garbage can!
Parallel parking is easy because you can see the curb and car in front of you :)
Left turns are the most awkward because you're at the outside edge of your car,
trying to do a large radius turn. Overall, the roll feel is just awkward and
would take getting used to.
The driver in the lane to the right of you is right next to you...which is
convenient when you want to speak to the mechanic driving the Ford GT next to
you, but annoying when kids roll down their windows and stare at the car
wondering what the heck it is, especially since this car was bright yellow with
a touch of green similar to the M3's color.
You accidentally move the wipers when you want to turn on a turn indicator, and
when they turn on, they sweep in a different direction :)
The angled/dipped lowbeams point the wrong way...shines into oncoming traffic
and leaves a darkspot along the edge of the road.
To enter manual mode, you push the shifter to the left, which makes it way too
far to do manual shifting ergonomically.
The Valentine One radar detector's display is hard to see because it faces the
left side seat.
The www.3acrossamerica.com event hit Detroit today. They had, on display, a 2002tii, E21 320i, E30 325is, E36 M3 Lightweight and an E46 325i. And of course, a new E90 325i and 330i. It was amazing to me how I could sit in even the late-70's, early 80's E21 320i and still felt right at home. The switchgear like the turn indicator stalks, gearshift, even the controls for the HVAC felt familiar! The 2002tii was quite a bit different though, and I think I'd need time to acclimate. The E36 M3 Lightweight unfortunately had the wrong wheels on...the polished ones that really were the E36 M3 convertible wheels in Europe (instead of the painted ones with the BMW Motorsport text).
Because we weren't given a chance to drive the new 3er, there's not much for me to add beyond what has already been published. The 325i is really a 3L engine with a less sophisticated intake system, and both cars post a 21/30 city/highway MPG fuel consumption. Both cars had the sport package and I think the premium too. Interestingly, the 325i sport package now has V rated tires (instead of W), even though both the 325i and the 330i use near identical runflat Bridgestone Potenza RE050A's. Well, the 325i one is the RE050A II, while the 330i is just the RE050A. The unexpected interior touch is that the rear passengers not only have their HVAC vent from the center, but they also get to adjust the temperature slightly with a dial marked with red and blue :)
The person who gave the intro to the cars was the M Brand Manager. When asked about safety, he noted that the front side airbags have now moved into the door, and the rear ones have been eliminated because there was no need. I asked later about the new 5 link rear suspension to see what his feel for its improvements were. I had tried to crawl under the car, but because the car was so low, I could only find 4 out of the 5 links...a trailing/diagonal link, an upper link and two lateral links. Interestingly, the two lateral links have joints basically one on top of the other. The response from the M Brand Manager wasn't very exciting. I was hinting that I wanted to know how the kinematics of compliance characteristics improved, but he basically told me that the old 3 link setup was good but couldn't handle the stresses of larger wheels and tires, and so they added the links to make it stiffer and prevent compliance induced toe change.
2005 Chevrolet Corvette (C6) Z51
Today was my last day at SVT. On my way out, the chief engineer said to me today that I left my mark behind because I can just look at the rear tires of the car when it comes out and can say that I made those tires work. In fact, the latest Motor Trend eluded to the work I was leading: "A clay model we inspected sat on 255/45ZR18 tires, but rolling-stock choices are still being finalized."
I also managed to get hold of our 2005 (C6) Corvette Z51 today and took it around town. And, fittingly for my last day, I was asked if I could drive the Ford GT this weekend on the track because they need certified "limit handling" drivers to do a 12 hour durability on it. So I'm looking forward to that unless the car breaks before I get to go in it :) Anyway, impressions on the C6 Z51 from a brief drive:
Very linear motor. Doesn't feel that strong at the low speeds but keeps building forever! I'm not fond of the sound though. The intake/exhaust seems too muted, so the primary noise is a cacophony of mechanical noise like valves, injectors, etc. The clutch grabs pretty quickly, so it takes some delicacy. And there's a lot of high frequency buzz coming through that can get annoying. Same with the shifter, which is even worse. It feels directly connected to the transaxle or something. The 1->4 force shift can be overcome with force, but overall the shifter doesn't feel snickety or buttery smooth.
Unfortunately, being on city roads, I didn't get a chance to really push the car handling wise. But it's one of those cars that seem to like it the harder you push it, so it should be very tossable on the track. This car is very easy to launch of the line. Little wheel spin or lots, you choose, as long as the traction control is off :) One thing I found quite unacceptable is that you can feel the toe change (crabbing) in the rear axle as you got onto the throttle hard (and then would change back as you lifted to shift). It feels like the subframe is shifting or one of the toe control bushings was out. But this car has been beat on very hard. The stability/yaw control does work! I gave it a lot of gas coming out of a bumpy corner, the car rotated until it tightened up the line and stapped rotating, with little reduction of exit speed unlike some systems that totally shut you down for a couple of seconds after pushing it too hard. I was in "competitive driving mode" though. Then I took it to our parking lot try to do a donut. Got started, but it shut me down. So I turned it off and had fun :) Brakes are just right in terms of feel and grabbiness for me. Didn't do any hard stops though, but those who have taken it to the track said they really held up well. Steering is precise and responsive but the feel is rubbery and slightly artificial. Now I know what my coworkers meant when they drove it before and said, "typical GM." Mustang is much better...even if it may be a bit too quick to yaw. The ride was certainly acceptable, and rolling plushness (smoothness feel of the tire as it rolls) was quite amazing given the road conditions and run flat tires. The rear impact harshness is definitely worse than the front, and the hatch could boom over certain surfaces to annoy me in Michigan.
The interior plastics do seem cheap and not up to par with the mechanical excellence. The heads up display works, but only if I slouch more than I normally would...or else I'd miss the display. Sorry this is short, but I only had a short drive! This car is not as refined as I thought it would be, but I hear that it comes alive on the track, so...that's where I'd need to take it before I can decide if I'd want it.
2005 Ford Mustang GT vs. 2004 Ford Mustang SVT Cobra
Over the past few weeks, I've spent
some time with these cars both the new Mustang and the old Cobra on the track
doing limit handling and as daily drivers, so thought I'd share some of my
thoughts. In ways, these are very different cars. It's like comparing a 1980's
E30 M3 with a 1990's E36 325is. Dimensionally much larger and heavier, the '05
Mustang GT (hereafter referred to as the "S197") is the next generation of the
mainstream muscle car, while the '04 SVT Mustang Cobra (referred to as the
"SN95") is a high performance, trackworthy version of the outgoing muscle car.
And since the S197 is now out for public sale, and the SN95 is now out of
production, I can talk about both :) I am currently working on the new Cobra
slated for 2007, and although I can't talk about that, it won't be a surprise
that it'll have the DNA of both these cars.
The new S197 is the much better daily driver. With more interior room and
precisely tuned suspension and steering, this car is able to handle. It still
feels large and slightly heavy, and visibility and ergonomics are not the
greatest, but I could ride and drive it around everywhere, with the only
complaint being some driveline noise (rear axle courtesy of Visteon and gearbox
courtesy of Tremec). The powertrain note is relatively pleasant but is never
quiet either. The aggressive electronic throttle mapping means that you can get
it to roar at almost any engine speed and even get a bit of that close throttle
popping from the exhaust manifolds. The clutch action is light, the shifter
snickety and the steering, although precise, a little bit light for my personal
taste. Controls are close by although some, such as the stalks that extend from
the steering column, are a bit flimsy feeling. The steering column gets a little
close to my knee. And why does the headlight dial force you to push forward to
turn off the foglights before turning off all the lights? Almost every other car
will shut off the fogs for you. The Shaker stereo system whose subwoofer takes
up about a fifth of the trunk space has so much bass that most people would want
to turn down the parametric bass setting well below nominal...the problem is
that the control affects mid-bass as opposed to what the subwoofer is putting
out. Disconnect the subwoofer and the boom goes away, but it still lacks the
mid-bass that gives the warmth. The rear seats give sufficient legroom but not
headroom due to the rear window, but I find the fact that the seatback does not
remember its recline position quite unacceptable. Maybe most Mustang drivers
don't use the rear seats, but when we're testing with equipment and riding
4-pass, we certainly do! The ride is composed, and the handling well balanced,
although in the wet this car can get entertaining (though not unsafe) with the
traction control off. The front suspension is a la BMW 3 series with an "L"
lower arm and a McPherson Strut onto which the anti-roll bar attaches. The rear
is the infamous solid axle which doesn't really make itself known other than the
occasional mid-corner bump that affect ride and handling more than expected.
Gone is the taxi cab feeling where it feels like the rear axle is so compliant
laterally that you think it's dancing underneath your seat. The engine is
interesting, rated at 300 hp @ 5750 RPM and 320 lb-ft @ 4500 RPM. I would have
expected a traditional low end stormer, but it's not. Peak torque fairly high up
so it does rev quite willingly even though it loses some steam right before the
6000 rpm redline. It has a nice hump of torque in the mid-range making it quite
a fun car to drive. First gear is low enough for an effortless launch, but 5th
is just super tall for anything below 100 mph.
In comparison, the old SN95 is an interesting beast. I wouldn't say it's loud,
but it's certainly noisy. Windnoise, supercharger noise, gearbox noise (courtesy
of Tremec again), tire noise, you name it. It's just a cacophonous machine!
Steering is a little sloppy, and the clutch pedal is the heaviest of any
production car I've been in since it's a cable operated single disc unit
clamping down 390 hp and 390 lb-ft. The brake pedal is also the stiffest and
highest of any car in my memory, which is great for feel, although it's
impossible to heel-and-toe in regular driving. Fortunately you don't have to
downshift much. This monster has so much torque that you can get going in 6th
gear without touching the accelerator pedal. And at 40 mph, you can choose any
of the 6 forward gears...what's your favorite number? :) In 6th gear at 70 mph,
it has passing power well above my car in 4th gear (I can't go into 3rd because
I will be at fuel cutoff hehe). The traction control is lame. In the dry it
works OK for the most part because it allows enough wheelspin and lets you go
sideways even, but once it decides it needs to protect you, the cut in torque is
so shocking that it's like slamming on the brakes. In this car I'm more afraid
of the traction control kicking in than the impending powerslide. In the wet,
you can get severe wheelhop before it comes into play. Surprisingly, the stereo
system in this car is much better to me...the warmth is there without being
overwhelming.
On the track, these cars are even more different. The new S197 is quite
responsive to steering inputs with progressive mild understeer, but it allows
you to play with the throttle. It doesn't quite have the torque to blast out of
the corners, but as long as you're smooth with it, it rewards and communicates.
The track that we have has huge elevation changes over a short span, including
ones that make you catch air, land and hop sideways, but the one that I'm least
comfortable with is a large sweeper with a crest in mid-corner and then goes off
camber after the crest. Here, the rear end of the car is never quite secure, and
because the road drops away from you not only downward but also sloped outward,
if you don't get the car turned in before you hit the crest, off the track you
go after the crest! None of us really lost the car here but it's not the corner
that you'd want to play with. The shifter, brakes. pedal placement and throttle
calibration allowed for easy, thoughtless heel-and-toe shifting.
The old SN95 is at home on the track, but in a very different way. Its cramped
cabin makes you feel more in touch with the car. And you can actually
heel-and-toe (sort of) because you're much harder on the brakes. It has enough
torque to blast out of the corners and puts a grin on your face doing it because
where as the S197 is a little nervous sliding sideways and going forward at the
same time, the SN95 allows you to put large sideslip angles and lets you feel
the bushings working without being nervous. This means you can slowly rotate the
car with power, and even when you're going quite sideways, it's comfortable
doing it. And that mid-corner, off-camber crest? Almost a non-event with this
car. Credit the independent rear suspension for this (double A-arms + toe link
on an isolated steel subframe) and also the 275/40ZR17 (which tramline like
crazy by the way) vs. the 235/55R17's of the S197. The front end of the SN95 is,
well, not very responsive. In mid-corners, your steering inputs are replied by a
rubbery feel, and quick transients just make the front end wash out without much
feedback. The modified McPherson Struts where the springs are mounted inboard of
the struts as opposed to being coilover are an interesting design. Overall, I
know was much faster and much more comfortable with the old SN95 on this track,
so this venerable beast would be my choice here, although I wish I could get my
feedback and response from the steering.
As a daily driver, however, the improved NVH and refinement of the new S197 gets
my pick. The only problem is that this car gets so many stares, thumbs up,
street racing threats and comments by import drivers and Mustang fans alike that
remind me that I can't go blasting around without being seen...
It's my last day at work for the year,
and what a better way to finish it off than driving a $140k Ferrari class Ford
GT(40)! I see these all the time in our garage, but the majority of my coworkers
haven't even driven it. Somehow it got around to me today!
Unfortunately it was raining, so it was hard to make use of the 550 hp, and there was no way to get the 3.x second 0-60 MPH time on wet ground :) But I did discover that you only need 1st gear to get to 60! I've driven this engine, slightly detuned, in other cars and found a lack of low end torque, but here it isn't even noticeable except below 1000 RPM if you just slip out the clutch and pull right from idle.
http://www.fordvehicles.com/fordgt/home.asp
Anyway, I only had about 15 minutes
with the car, so no complete review here.... But became immediately obvious what
that the car was so liveable, even as a daily driver. You feel everything, but
just slightly. The abruptness and choppiness were better than many "regular"
cars out there in my opinion. Impact harshness was quite audible (especially at
the front), but not very disturbing at all in terms of feel. Obviously I didn't
push this car hard in the corners like I normally would, but I got just enough
speed to get a feel of the mid-corner throttle change effects. And I did an ABS
stop at low speeds just to give it a shot. Just rolling moderartely into the
throttle in first gear will spin the rear wheels. And before you know it, you've
hit 80 MPH. And it feels like half that.
The worst part is probably the ergonomics and vision. Much of the roof opens up
with the door, so you think you're going to chop your head off when you close
it! The exterior rearview mirrors are tiny, and the interior mirror just gives a
good view of the engine behind you. Even though the supercharger pulley is right
behind my right shoulder, it really wasn't that audible. The sound (which is
awesome by the way, especially at high revs) just surrounds you instead of
seemingly from right behind you. The steering wheel is tiny, but there's nothing
wrong with that, other than it blocks the top of the tachometer for me. Some
complained of high friction, but I actually like that feel as it allows you to
keep a slightly off-center angle without much effort. It doesn't feel extremely
quick (it's about 3 turns lock to lock), but the feel is there obviously. It
just turns right away, without lag and without being overly quick (which I've
found to be the case in some Fords once you get past the initial delay.) The gas
and brake pedals are close enough to do heel and toe, but the brake pedal is a
bit high relatively; it'd probably be perfect on the track. The clutch is light
and progressive (but too far to the right for me), and the gas pedal is slightly
on the heavy side for me, which is probably a good thing to keep all the horses
in check. The shifter on this 38000 mile car felt sticky left to right. This car
had a pretty looking McIntosh head unit instead of the terrible Rockford Fosgate
one (I only know it's terrible because I have a similar one in my car!)
Interestingly, the wiper and turn signal stalks are out of the Focus, and even
the click-clack sound is the same :) Door latches are fully electronic, so when
you lock and unlock the door, instead of hearing the mechanicals, you get a beep
(or two) instead :)
That's about it for now. Rather short for my standards, but I'd need to spend
more time with the car to say more!
I got a chance to spend about 300 km in an ML350 on Vancouver city roads. Some disclaimers first. The cars I've driven recently are almost all performance sports car, other than the SVT Lightning, so my baseline and expectations for a luxury SUV may be way off :) Also, this car only had about 250 km on the odometer when I tried it, so I didn't push it as hard (especially the engine) as I normally would.
Overall, I was very unimpressed :( Funny that the version I drove was the Special Edition, since there really was nothing special about this vehicle. I was expecting equipment level similar to that of the E Class, but it wasn't even close. No headlight washers (and this is an SUV in Canada!), no seat memory which means no curb setting for the right side rearview mirror, no steering wheel buttons/controls, no telescoping steering wheel (although it does have a telltale for when the tilt wheel is unlocked), not even a locking glove box. And the homelink garage opening buttons are mounted on a flimsy piece of plastic that leaks light from the dome light. The trip computer is on the overhead console, and supplies minimal information. It's clearly an afterthought and attempt to keep up with the competition because it's hard to use and hard to see. And why does the interior have redundant map lights, both in the overhead console and under the rearview mirror? Perhaps the mirror is carryover equipment from another vehicle and just happens to have a map lights. The xenon low beams don't seem that great at all, and neither the high beams nor fogs do much to help. Well, at least the Special Edition has the Dunlop SP5000 255/55VR17 tires from the ML500.
This is a 4800 lb truck! And although overall grip was quite impressive (in both the dry and the rain...these tires aren't bad), it does not like to play. It is understeer all the way, in seemingly every condition. It doesn't even feel like it wants to rotate or yaw. Mind you, I was limiting myself in how much I could upset the car since I didn't want to overstress the new engine. The overall steering ratio is the slowest I've ever experienced I think (meaning that you need to turn the wheel very far), and there's pump catch (where the steering loses power assist when you steer quickly at a low speed so it becomes really hard to turn the wheel anymore). I think I must tend to give really quick steering inputs since the Mercedes E Class was a huge problem for me (that one has electric power steering), and it took several reviews before a journalist pointed it out. The Mazda 3 also exhibited this when I was driving it through an emergency lane change setup. The steering efforts overall were fine, but the self-centering at center +/- 90 was the most mimimal of any vehicle I've been in. I do like having to recenter the wheel myself the last 15 degrees or so, but not the last 90! This happened several times going up/down parking lot ramps: I accelerate out and find that I have to yank the wheel back to center, and because there is pump catch, I can't get the wheel back to center :( In case you're wondering why I talk so much about steering now, I'm the engineer for part of the steering system on the Mustang Cobra :) Oh yeah, although the optional tires may be grippy, this truck has an unacceptable tendency to wander across ruts/grooves and does not track straight when the road is anything but perfectly horizontal. My car is pretty bad for this in comparison to the majority of cars on the road, and so is the old Mustang Cobra, but at least these cars give good road feel through the steering.
OK, so the engine is interesting. I only went up to about 5000 rpm since it's still a newbie, and I discovered that it really comes alive over 3000 rpm. I looked up the torque spec, and it's no surprise that its torque peak is a plateau from 3000-4500 rpm. So this car can gain some speed quickly, but the torque hump is almost too abrupt and, depending on what the unexplored top end is like, seems more suited for a manual transmission. Fortunately the first 2 gears are very low, so it still feels OK off the line. The transmission shift logic is really pretty good. It finds the right gear most of the time and clearly looks at how quickly you change throttle position and not just the position itself. It is prompt to do 4-to-3 downshifts, but very reluctant in doing 3-to-2, probably because 2nd gear is soooo low. This is the first time I've been in a vehicle with the manual override on the left/right of D as opposed to being in a different fore/aft. And it works, ergonomically because whenever you want to go back to regular D, you just hold the shifter to the right for a second, and you're there. There's no need to switch to a different gate. And although it will downshift when you pull left and upshift when you push right, it actually doesn't hold that gear forever. In the end, an indication of "3" means that it will use the first 3 gears, like a regular automatic. So this is a weird system. It's not the true manual override but looks like one. It works for the most part. I did try the low range for a little bit. Lots of gear whine, but I guess it's acceptable since it is for off-road use. It will not shift out of low range even in neutral at speed. I need to be near stopped, which meant that I was driving on this small highway for a while stuck in low range. The manual also mentions that the electronics are calibrated differently in low range so that's good :)
OK, here's the worst part of the car. The primary ride (that is, over low frequency waves and inputs) is fine; there is no pitching or weird stuff. But the secondary ride (response to sharper, smaller impacts) is unacceptable. First you realize that this must be a body on frame car because there is so little structural damping. Various parts of the car quiver and wiggle after the bump, very atypical of Mercedes. It's on the borderline where I'd say that the springs, tires and shocks are too stiff for the body to handle properly. And despite being stiff, there is still a lot of vertical body motion (both float and abruptness coming through from the bumps). I guess it's a good thing that Mercedes advertises that it has 200 mm of total suspension travel because it seems to need it! By the way, even the Mustang can come pretty close to that number! The terrible overall ride really reveals the age of this design. And there seems to be quite a bit of lateral and vertical coupling of the motions in the rear. Feels like a high roll center or some funny compliance/bump steer there.
The foot controls....The accelerator pedal is sticky, which is hard to believe considering I'm just stepping on a lever actuating a potentiometer. The cruise control stalk feels like it's going to fall off since it's teeny and has a whole bunch of bends. And the brake pedal...yikes...worst initial brake feel. Not only is there a lot of travel before anything happens, the effort initially is a little high, and I feel like I'm stepping on a spring pendulum. It's an all artificial feel. I did not attempt to invoke the ABS on these fresh pads, rotors and tires. Fortunately the anti-dive/lift is sufficient. In this area it's a lot better than the E Class which dives a whole bunch and feels like it either has super soft front springs or pro-dive for improving impact harshness!
Now the minor things. The ventilation system can be run in fully automatic mode and works quite well (the rear has its override controls), but in the chilly fall weather, I found that, although the temperature was about right, there was too little flow so parts of my body wasn't warm enough. Anyway, that's a small gripe compared to some of the others I've already mentioned. The door closing sound is not typical Mercedes. It's not entirely cheap sounding, but it just sounds weird :) However, the rear seat fold/tumble system is nice and solid. And the fact that you could add two more seats is pretty cool. I didn't check on the spare tire/wheel, but it looks like it's not going to be a lot of fun based on the instructions from the owner's manual :(
I had this car over the weekend and for a few laps on the track at Gingerman Raceway. I also drove the BMW M5 on the track (see below) and a prototype of the '07 Cobra (but I'm not going to write about that because I don't think I should)!
The '04 Cobra though is more fun than I had expected. The torque and power are incredible. 3rd gear is like my 1st, 6th is like my 3rd.... And even though people say the suspension is hard and not a daily driver, I don't mind it at all. In fact, it has significantly less rebound damping than my current setup, and there is much less roll. Sure, the driveline clunks and the clutch pedal is heavier than any street car I've been in, and there seems to be a lot of axle/driveshaft noise, but it's still a blast. There is less pitching and vertical movement than in my car, and even though the soft platform is made known over some of the bigger bumps, overall it's not a huge problem. This is still miles ahead of the base convertible that I rented before. I never thought I'd like torque this much. The brake pedal is very firm and grab quickly, even though they are known to be a weak point in terms of durability. My supervisor came to the end of the 2nd long straight with sparks flying from the brakes, but to me it looked more like fire. We all waved to tell him to take it easy :) Once the ABS comes in, it seems to cut back a bit too much pressure though.
The stereo takes a while to power up, and the display doesn't takes the same length of time to change, so several times I kept pressing the power button thinking that I didn't press it hard enough. And when the soudn comes on, the tweeter comes on first, which sounds really bad. Squeaks and rattles were few, although there was a clear noise leak from the right frameless window. You have to press and release the rear defogger button before the indicator lamp comes on. But for the traction control button, the indicator changes once you depress. Speaking of traction control, it allows a pleasant amount of wheelspin, enough that you could leave it on and still kick the rear out a bit. But once it comes in, it's quite abrupt, and it upsets the whole car. The system is necessary because it's possible to spin the wheels in 3rd gear at high speed in the wet. Thus I was able to practice donuts and burnouts...briefly in the wet...because the car was to be used as the baseline car on the track.
I enjoyed the balance of this car. It's more neutral than almost any other car I've driven. And unless you go into a corner way hot, you always have enough reserve to rotate the car with the throttle. It's sure a funny feeling to get on the gas moderately on an on ramp and get the line to *tighten* instead of widen with more throttle. The wide front tires (275/40ZR17) don't do that well in the wet though. And the steering, although not terrible in transmitting disturbances, really gets affected by road crown. On the track, it feels too light and doesn't give you the feedback of cornering load by increasing centering torque. But without the extra load, it's easy to flick around with not too much effort. The car seems to respond nicely to lift throttle and light braking...not totally unresponsive and not scarily quick to rotate either.
The suede seats are awesome. You can adjust the width of the lateral bolsters (both the leg ones and the torson ones), but the controls are in a funny location (at the front edge). And to move the seat fore/aft, you move the lever left/right. I can't believe there is no way to select a bi-level air distribution either :(
This was the first car I took onto Gingerman Raceway. Having driven an '04 SVT Cobra the whole weekend, this car felt really awkward. The clutch pedal seemed so light in comparsion, and the brake pedal had so much travel that I thought I was pressing on air! And in comparison, this car has no torque, even though I'm running right around redline. And it has a ton of understeer. The other guys said they could only get it to oversteer if they gunned it in a low gear in a tight corner. For me, it was in a S-section of the track, mixed with lifting the throttle. The shifter feels a bit light and sloppy in the fore/aft plane, but the steering builds force nicely. In fact, it gets a bit too heavy at maximum lateral G's. The feedback is good, but I think it'd get tiring after a while. This is not my idea of a track car, but considering that it seats 5 relatively comfortably and can run all day with the sports cars and come within a couple percent in terms of lap times, that's not bad! Here's a photo of me driving it.

I didn't get a chance to drive this car :( But I rode in it at least, and that was a blast in itself. It allows you to leave the active handling (stability control) on but turn off the traction control, which is pretty cool because that means you can get the rear tires spinning a bit and the car going sideways, and as long as you do it smoothly, it'll be happy. But once you start gaining a lot of yaw, then the binders come in and restore you to the proper angle as dictated by your steering wheel position.
According to the drivers, the steering wheel was unfortunately numb. The rear end is also quite jarring on the streets (especially in comparison to the fronts). But take it on the track, and the car comes alive. Being in the low 3000 lb range compared to the heavier M5 and Cobra, this car was a lot more nimble. Even sitting in the car I could tell that the front end gripped much better, and it was a blast to feel a few degrees of sideslip (going sideways) predictably. The normally aspirated and not so peaky engine was fun in its own way. The brakes are glass smooth, whereas the other cars you could feel, even as a passenger, some of the grittiness coming through. And very effective, time after time. This car is about fun! The heads-up display was supposedly quite cool, but I couldn't see it from the passenger's seat :)
SVT got a surprise R32 this week with
the DSG dual clutch sequential manual :) This is the $29k Golf with the 18"
performance tires, Haldex AWD, 240 hp VR6, fully independent rear suspension...
http://www.vw.com/r32/flash/flash.htm
Some brief comments...too lazy to write in paragraphs now...
-Stiff ride (choppy in rear where I sat through one drive as expected) but not
harsh at all. Reminds me of my car when I had coilovers, with better harshness
control. But when I started driving, I felt that the structure was less stiff
than I had expected compared to just riding in it. Some disconnect between
steering wheel and body. I think it needs stiffer bushings at the rear of the
front control arm, or the brace that you have, Andrew. A very mild version of
the out-of-phase shake that disturbs me a lot on convertibles...and the Windstar...Some
unnecessary secondary ride high frequency input that is evident again, only from
the driver's seat. Feels like shocks could use less high speed damping. Overall
ride is close to my car with the coilovers on, but not quite as stiff over the
big bumps.
-Front suspension is basically the same design as the other Golfs. Blue springs
say VW racing or something like that on them. Rear suspension is unique trailing
link with two lateral links. Spring sits on the trailing arm. Very similar to
the Mini Cooper and Ford Escape / Mazda Tribute, all of which are similar to the
BMW 3 series design. Rear bar and shock shares a single fastening point on the
trailing arm end. Shocks are inclined to the rear about 30+ degrees from
vertical, probably to allow the rear halfshafts to pass through?!
-Tires (Pilot Sports) like to make noise, even in the sublimit linear range, it
starts to make light noise to give feedback of cornering force.
-Brakes a bit soft/long travel initially, given class of car. Huge front brakes
though.
-Not enough power to get the car into trouble in the dry. Almost no torque steer
(a big plus). Probably best steering of a non-RWD car I've driven, except for
some of the AWD BMWs (but they don't have enough torque to make much disturbance
anyway).
-Rear end can be adjusted under lift throttle once front end nears
saturation...nice. Didn't try to get it to rotate in brake and turn.
-Downshifts are amazingly fast and smooth. I guess that's the benefit of the
dual clutch. Upshifts are comparatively slow, surprisingly, but very smooth.
Feels smoother than an automatic on an upshift, unlike BMW's SMG where it feels
like a hard manual shift. Shifts are so smooth that I would probably just shift
for the fun of it. Torque to the wheels remain exactly the same as long as you
hold the throttle the same. So shifting gears is basically like changing musical
notes. Upshifts especially slow if you rev a bit too high on the 1-2. The gentle
rev limiter comes in, and it won't upshift for you until the RPM drops enough
(slowly). Very annoying.
-Will downshift upon WOT even in full manual mode. Will not allow starts in
anything other than 1st gear from what we could tell.
-Regular automatic mode will go into 6th ASAP. Sport automatic mode likes to
hold the lowest possible gear, even when it's totally unnecessary. In either
auto mode, a flick of the lever will put it into manual mode and remain that
way.
-Engine note is droning at low RPMs (up to 2500) with moderate throttle
openings. I would avoid that range in my driving, which means you can't leave it
in auto mode either.
-Power delivery is very linear. Would like more top end though.
-Seats are nice. Side bolsters are very large. So large that my elbow interferes
with it when using a lot of steering lock. The folding forward folds on 2 (or
was it 3) dimensions. If you push it back wrong, the integrated headrest would
get stuck on the visor. The recline and lumbar knobs are on the door side. I'd
rather have it on the inboard side because there's not enough room between the
door knobs to turn them properly.
[Part of BMW Ultimate Driving Experience.]
I had a bit of time before the event, and this car was available for the Susan G. Komen Breast Cancer Drive for the Cure, so I took it out. A 10 mile route is described on a piece of paper in the car. I wasn't particularly excited about this car, but I thought it'd be a good comparison as I've driven my mom's 325xiT (the all wheel drive wagon version which just has way too much grip to be exciting). So I thought that this car, being traditional RWD should serve as a good comparison. I walk up to it, but I notice it has the Michelin Pilot Sport Cup tires. Why does this car have racing/competition tires?! First impressions. Heavier steering, much better than the 2001 330Ci I drove a couple of weekends ago. And a firm, quick biting brake pedal. I come to the first corner (left hander at a traffic light), and I floor it in 1st gear. Get a hint of understeer, expect the rear to come around slightly as it goes over the same bump, but it doesn't, and the line tightens. Oops. Forgot to turn off stability control. At least there was no squealing...these tires are nice for grip. Turned it off entirely (including the traction control) and continued with the drive. Looked for the paper with directions...it had fallen off the seat from the cornering. This car has too much cowl shake. Nothing like the coupe. After about 8 miles and going through some bumpy roads in the area, I've had enough. The open air experience isn't enough for me to forgive the lack of rigidity. Miles ahead of the Mustang convertible that I rented at Disneyland, but this still isn't a performance car. And the grippy tires make the car very darty. I'm constantly correcting the steering. Feels like too much toe-out. On the final turn back, a right hander, I floor it to try to get the rear to come out. Stability control didn't kick in (it was off), but just where I thought it was about the slide, the transmission shifts to 2nd. Oops. I had depressed the gas too much (activated the kickdown which took gave automatic control). It was a hard shift, harder than I've ever felt in an automatic. I don't think it was good. A fun ride but not the driver's car I remember BMWs to be.
[Part of BMW Ultimate Driving Experience.]
The intro session/chalk talk was quite well done. Apparently someone had stolen one of the cars after a drive in LA and went all the way to Florida. But instead of jail, he was given the choice to give a donation to Susan G. Komen instead :) The worst part about this car is its interior. Not only does it look inferior to other BMWs, it squeaks and rattles all over, particularly in the door panel and window area, constantly! But, it drives nicely. This is the hardest I've ever pushed any car with the stability control on. And it can be fun with it on. The corners were faster than most autocrosses I've been on. The Michelin Pilot HX MXM4s squeal a ton, but the car responds nicely. The instructor said I was very smooth and asked if I did ski racing (or was it race skiing), but I felt it difficult to be smooth on the throttle. We were running the Steptronic in 2nd gear, but most of the time I was in the 5000 rpm range, and the throttle is still more sensitive than my car with its nice torque. The xDrive is seemless. No hint of torque steer or much understeer under power when driven smoothly. I'm actually surprised at how easily the rear end will sidestep slightly under lift throttle, just like my car does. But the stability control comes in gently. As the instructor said, we'll leave the 4 Germans under the car to do their work :) There is quite a bit of roll, but this car is definitely well balanced. I can't seem to throw the rear around under power, but it's smooth and quick.
[Part of BMW Ultimate Driving Experience.]
I was waiting for the 2.5 with SMG
(sequential manual gearbox) or the 545i manual, but both were "booked." In any
case, two guys took the 2.5 SMG out for over an hour, so it became MIA. This 3.0
would be my second convertible of the day, and I didn't want to be disappointed
again. I move the steering wheel and it's very light. Uh oh. I blip the
throttle. It has a nice burble when the throttle is closed. Once I start moving,
I realize this was going to be much more fun than the 325Ci convertible. Best
automatic I've been in. Very fast, very smooth. I think if I wanted
someone/thing to shift for me, I'd take this over the SMG. I do that first left
hander again, and it's uneventful, but significant tire squeal. Despite the
steering being light at a standstill, it firms up with speed. I think its
weighting and precision is better than any car I've driven lately. The ratio is
quick too, as I flicked it on a straight and got the Michelin Pilots to squeal.
I tried it again. These tires squeal a lot for the max performance category! But
at least the they don't make the front end dart around. Lots of bounce,
especially from thee rear axle. This is much more of a performance car. It makes
me want to drive it hard. The structure is pretty good. Not great but not
annoying like the 3 series convertible. I turn on sport mode. The throttle
response is much better, but it doesn't make the car suddenly lurch ahead like
it does in the M3. I don't think it's really a necessary feature though. At a
faster right hander, I get on the gas early hoping that the power would send the
rear out slightly. But again, the front tires squeal. I think BMW built too much
understeer in to deal with the power. Oh well. I do that last right hander as I
did in the 325Ci, but again, I pressed the pedal down too far to activate the
kickdown/automatic mode (these cars have less pedal travel than my car). Again,
it upshifted just as I was expecting the rear to come around slightly. But at
least the shift was smooth.
Overall, I would get the Z4 3.0, but in manual of course. The X3 3.0 is a fun
car if I only could have one car and it had to be practical. The 325Ci
convertible I would not get. I go back to my 318is. Wow, the structure is a lot
better than these convertibles. And, despite having much less torque, I can
actually snap the rear end around if I set it up properly. Looking forward to
the 1 series...
Drove a manual 330Ci coupe (sport
pack) briefly yesterday, and here are some unorganized thoughts.
Low end of the engine feels a little soft. Didn't spend enough time to figure
out if it was the throttle response or the engine. Mid and high end are nice.
More fun than a 328Ci automatic and much more fun than a 325xiA automatic which
doesn't have enough torque to the rear wheels to make the car come alive under
throttle. Much nicer exhaust note than either car, probably helped by the K&N
cone filter.
Switched off the DSC stability control and the ADB differential braking
(traction control) as well. Kicked the tail out in 1st gear at a Michigan left
(U-turn). Still don't think I could like FWD because RWD is just too much fun :)
I don't think I need this much power for daily driving, but I like the ability
to be able to throw the rear out without planning for it with a trail brake
entry or waiting for foul weather.
Found that I had to lift off the throttle completely between shifts to get the
revs to match, whereas in my car I actually need to hold the throttle open
slightly or else the revs would drop too quickly. Noticeably less total travel
than the E36.
Shifter is a little long and light but fairly typical BMW.
Steering is definitely light. I think this is one of the first 2001s with the
lightened steering that people didn't like. I don't think feel is diminished
that much, and the lightness is acceptable, just not preferred for me.
Secondary ride from harsh inputs feels too filtered for me, coming from my car.
I don't think I'm feeling the road texture as well as I'd like. It's not the
tires because the car was shod with the "hard" S-03s. I'm sure it works well on
the roads here, but I'd like more input and feedback. Abuptness from heavy
damping was also absent.
Brake pedal initial travel was about the same as mine...meaning it's more so
than other E46s I've driven.
I know what people mean by the clutch hydraulic delay valve now. I didn't do any
hard starts, so it didn't bother me there. But in my faster shifts...well it
wasn't very fast. And I couldn't get it to jerk like in an M5 or M3 SMG. Seems
like the clutch was grabbing slightly more gradually than my foot was dictating.
Overall a fun car that's filtered nicely for daily fast driving (goes fast
without really knowing it), but lacks the directness and liveliness of the E36
platform or the urgency (that makes you want to push it to redline everytime)
and directness of the E46 M3.
[Short review from brief drive at
Tail of the Dragon]
Got a brief drive in this car, not in the twistiest section and not pushing it
that hard, but this is one beast! When the turbo comes on, it's a serious
"concave up" type of feel. Wish it had more anti-lift/squat though. I'm not used
to the behavior at all. In tight corners, the torque steer pulls the car hard
into the corner, requiring me to center the wheel manually. Self-centering
torque builds up really quickly off center. Brake feel is awesome: firm and no
deadband. A variety of strange driveline and road noises permeate the cabin.
Incredible mid-range pull. This is not an easy car to drive fast until you learn
all its chassis and powertrain traits.
[Short review from brief drive at
Tail of the Dragon]
Despite being similarly powered as the STi, this car feels like it can be driven
fast quite nicely. Superb top end pull. SMG is super fast when pushed,
accompanied by a hard thunk through the driveline that just can't be good. Some
light shifts feel kind of slow though, especially the downshifts where it takes
its time to match the revs instead of a quick blip. It's a totally different
experience. I think some of the shifts are not actually slow but feel a bit slow
because I'm expecting the near-seamless torque delivery of an automatic based
shift. Instead, I pull the paddle, and there's some time (when I'd be doing my
shifting on a normal transmission) before the power comes back on. I guess we
need to ask the passenger for a fairer comparison. On the large throttle shifts,
however, these are just amazingly fast. I'm happy that BMW kept the rapid
throttle response on lift throttle to actually get true lift throttle oversteer
instead of a damped closing like on the non-M cars.
I got a chance to rent a 2004 Mazda 6i (inline 4, auto) in San Francisco. I didn't drive it as hard as I normally would, but I did get to take it on a few twisty roads. Again, this is a brief review only. I think the car needs more rebound damping. It's better than the other cars in the class, and the overall feel is good; in fact, it is quite confidence inspiring in the corners, but it's over highway undulations that the car tends to float a bit, and the steering is light enough that my vertical motion causes me to input some steering. But fortunately the steering is not too sensitive on center, so the car doesn't actually wander as a result. If the steering were very quick, then this could be a problem. Understeer dominates of course, but wheelspin coming out of tight corners is actually quite mild, and torque steer is not much of an issue. It was definitely more annoying in the 6s (V6) version that I had driven before. The semi-automatic transmission works quite well. It can be a bit jerky at times, but it shifts quickly. I wish it displayed the selected gear even in automatic mode, but it doesn't. Strangely, it does in the Mazda 3. Perhaps the best thing is that the transmission does not upshift. Instead, you bounce off the rev limiter. It's not a soft cut either. It just bounces at the limiter. That's great, but it can also catch you by surprise of course. Turn-in is OK. There's a little bit too much initial roll I feel, but I'm not sure if that's actual springs and sidewalls deflecting, or if it's just from the high caster and diagonal weight transfer. Basically, the steering has quite a strong on centerness to it that anytime you go off center, you also feel the car rolling with it. I like the brake feel on this car. It grabs early and firmly. However, there's no ABS as I tested on purpose coming down on a steep San Francisco hill :)
DSC-X traction/stability control update (2003 BMW 325xi Touring Wagon)
I had already written a review of this car but I found out a lot more about it when I drove it over Christmas break and when there was lots of snow. In general, this stability control system with AWD is quite awesome. Actually, what's more amazing is how little the car needs to invoke it. Like I wrote before, in the dry and wet, you could floor it around the tightest corners, and the car would just pull itself through without any fuss. In the snow you finally get into the system, but it manages the tires' traction well. Initially, under hard throttle, whether in a corner or not, you sense the rear sidestep a little bit (probably from the initial torque bias), but then the electronics take over and it pulls itself straight (not that it really went sideways initially, but it's just a slight twitch that gets corrected). And it's a system that allows for some slight drifting in the snow, but if you open the throttle too much, and the system senses that it needs to reign you in, it will cut the throttle so much that you end up just slowing down a lot. So the trick is to stay on the verge to have the system help you but not let it take full control. It's been a while since I drove this car, so I've forgotten a lot already. But I do remember too problems with the system. One is if you're entering a 90 degree snowy corner a bit too fast, and you start to get understeer. Enough understeer to make you realize you're understeering, but the corner is so tight and relatively slow anyway, the sensors don't seem to pick up the seriousness of the understeer. I think it's probably relying on integrating the error in this case, and since the yaw rate is relatively low anyway, it doesn't do much. So it's still possible to enter a slow corner a bit too fast, and if you're hoping that the system will pick up the understeer, it doesn't always. Perhaps the trick is to add a lot of steering lock once you feel the understeer in order to get the control system to kick in abruptly. The other problem, which may actually be a loophole for fun in the system is if you start a tight turn from a stop and increase speed slowly. At some point you can add more throttle. As long as you don't add it too abruptly, you can have tons of fun. Somehow the system will get confused and allow for serious drifting basically pivoting on its front tires. I'm not sure why, but I was able to repeat it as long as I started off slowly and didn't hit any understeer. If I hit understeer first, then the throttle will get cut. The system also allows for a different winter driving technique. Basically you can turn in a bit earlier and a bit extra, punch the throttle to kick the rear out. And it will seem to allow the rear to kick out enough to straighten the car, and it will apply the outside front brake and cut ignition timing briefly to stop the rear end from rotating further, and the car will blast out straight. I guess it's sort of the electronic version of the viscous center diffs. Basically the system is great fun as long as you don't get it too paranoid by going all out crazy initially.
I recently drove on a weekend at home my mom's new 2003 325xi automatic touring wagon. The last E46 I drove was the 2000 328CiA coupe that I wrote about in July. This won't be as complete or as coherent a review as normal as I don't really feel up to it.
I love the rain sensor! It's not perfect, but it does make things a lot easier in the rain. Only when I returned to my non-rain sensor car did I realize how annoying it was to adjust wiper speed. Rear wiper intermittent timing is programmable. But because the rate at which the rear window fills up changes so much depending on speed, there's not much point in programming it. If anything, a rear rain sensor would be most beneficial.
Xenon headlights still aren't as great as I read about. It is certainly better, but it's nowhere near a night and day difference that people rave about. The auto-levelling is nice, but it gives sort of a disconnectedness. I never realized how much the headlight projection was a feedback in night driving for me as to the pitch of the vehicle. In this car, as I accelerate hard, I see the headlight point up and then adjust back, which throws off my perception of vehicle pitch a bit.
The engine is quite nice. I like it much better than the M52s, even the 328 engine, because it still has something more to offer at the high end. It doesn't scream away at the top end as I would like, but it does still keep pumping instead of giving it all in the midrange.
The car actually feels quite fast off the line. But after a while you realize that a lot of it is because of the electronic throttle. Other than a very small deadband (much less than the 328), it is very sensitive. So you really don't need much more than the first 1/3 of the throttle. The rest of it is good for inducing a downshift. So even though the engine doesn't give you everything it's got at by the mid-range, it seems like the throttle almost does! Whereas the 328 feels sort of sluggish to start and then comes to life when driven hard, this car comes to life right a way. It doesn't die at the top either. It's just so smooth.
I got used to the swapped + (aft) / - (forward) buttons more easily than I thought I would. The sport mode actually works pretty well. It will hold a lower gear and make use of the higher rpms. In general, this transmission will make use of the engine revs a lot more, and they work together well. I still love the way the power is briefly interrupted under large throttle openings. It seems so perfectly timed, so smooth yet so efficient. Downshifts come very easily, unlike the 328 where it took a lot of work.
The exhaust note at startup and low rpms is actually quite noticeable. Maybe too much so for this car.
The biggest disappointment actually is the tranmission of cabin boom and rumble. It is not terrible, but much worse than any other BMW I've been in. I'm sure the open wagon is the source here, but maybe different tires would help. This car has the MXV4 Energy (205/55/16). I'm sure a subwoofer would sound fabulous in this wagon!
I still don't like how there's a slight delay between the cancellation of the turn signal and when it actually does cancel. I still can't get used to the auto dimming rearview mirror. It's always too dim at night.
The steering feels a bit different. Can't say exactly what. Perhaps it's a slight loss of feel for the high frequency bumps. Yet the big bumps still come through. Maybe it's just the lower profile tires. But at near full lock, the steering does lose its ability to self-center, which I don't care for. There is a tiny, tiny bit of torque steer. I wouldn't really even call it torque steer. It's more like just a minor disturbance in the wheel that comes just upon hard throttle tip-in.
I still am amazed at how all E46s I've driven handle single-rear wheel bumps and dips. Considering that it's a very similar setup and geometry as the E36, the E46s just handle them amazingly better than any E36 I've driven.
The most amazing part about the car is its traction under acceleration. Even with DSC off, I can mash the throttle through a tight corner at all semi-sane city speeds in the wet without anything happening. I know that the ABD-X torque distribution is supposedly still active, but I don't feel anything at all. I wonder if it's really doing anything or if the standard torque split is just perfect! This is a car that I wouldn't be scared up going full throttle from a standing start in any corner. If anything, it will understeer a bit, or a lot, and I can just ease off. However, this gives false confidence in the car's overall grip. In jerky slaloms, the rear will start to loosen, and the slip angles are much larger than what I'm used to. Fortunately the yaw rate builds up smoothly...unlike those ES100 tires that I loathe. I am surprised at how much it can loosen before the DSC kicks in. It does have a very high threshold. I find myself correcting way before the DSC even catches it. I guess that means I can drive with the DSC all the time without getting annoyed at it. To induce oversteer, I really have to prevent myself from trying to correct. But when it does correct, it comes in hard as you feel the tug of the correcting moment, not just hear the brakes working. I've not had it correct for understeer yet though, even though I wish it did because with the AWD, I definitely get understeer under power. The problem I find with the DSC is that it gives a feel of understeer. It's not that it's really understeer, but it feels that way. I think this is why: I give a sharp input to get the rear to step out. What happens is that the DSC kicks in, but I correct the wheel too. And the combination of our inputs just makes the car run wider. So the DSC is thinking for me, but I'm also thinking for myself! It's all about trust. To make the best use of the DSC, I really have to resist correcting and trust the DSC.
Anyway, this car seems so forgiving with the throttle without giving you the torque steer and severe understeer that's characterstic of some other AWD/4WD systems that I've driven that it's actually quite amazing. Now it's time for me to try some purely mechanical Torsen setup :) Even without that much power and with an automatic, this car has a passion that I've found lacking in the M52s. Yet it is so well behaved under power that you start to think you won't have that much fun and that it's just too good of a car for you to flog around. You feel bad doing it. But then you give the car sharp inputs and find that, hey, this car does want to have fun. You just need to know how to get it turned on :) It's a trustworthy car that still has a fun side to it. Hey, sounds like the perfect family car to me...
I am driving a friend's 2000 328CiA with sport package for a couple of days. So here are some observations...
*Disclaimer: I haven't driven my car for about a week and a half now...so I've been driving our Pathfinder.
Everything feels a bit too isolated for me, particularly the powertrain. The throttle tip-in is soft and the first couple thousand RPMs, there doesn't seem to be much life. But maybe it's the transmission or electronic throttle...hard to tell with an automatic. So in leisurely driving, this car doesn't feel fast at all. Even driving moderately, the car still doesn't feel that spirited because the mid-range RPM torque curve is pretty flat. Only driving hard...as in beyond 2/3 throttle does the car come to life. Even then, it's without any drama. The powertrain is so silent that you don't feel like the car is rushing anywhere, even though it picks up speed. The car at 6000 RPM is quieter than my car at 3000!
The brakes are a little softer than I had expected. I remember some E46s had a very strong initial bite, but this one doesn't. There's also a bit of play laterally in the brake pedal as in the E36, which I don't care for.
The ride is quite nice, with adequate damping and much better suppleness over large bumps than my car with coilovers. But some small bumps do make it through more than expected, just as with my original suspension. The stiff tire sidewalls are nice and lend to quick response unlike my current tires. Road noise is louder though, especially since wind and engine noise is so low in this car. The noise over textured pavement doesn't change much in volume or in pitch as the car picks up speed, which is kind of strange to me.
The handling reminds me of my E36 before the suspension modification. It's still a lot easier to get understeer on throttle; if you do things smoothly, you feel the front end wash a bit before the rear comes out. But, with a lot more torque on hand, the rear can snap away fairly readily in the wet. The Contis squeal slightly at the limit just like my old Contis, but the response is linear and immediate unlike my current Yokos. The stiffer sidewall also gives a more immediate turn-in than the Yokos which allow the car to lean a bit onto the sidewalls. In mild to moderate cornering, the car feels as composed as my car. But as the forces build, particularly in quick transitions, the extra body roll and weight are evident.
As with other BMWs, the transmission programming in Drive is pretty good. The best part of the transmission is how it communicates with the engine during hard driving. You can feel and hear a brief holdback on the power just before the shift. For some reason, this aspect r