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View Full Version : ZHP: track day + clear corners on Imola


adc
08-11-2003, 01:51 PM
Allright, for all of you that really wanted to know what a ZHP can do at the track :), here are my impressions after yesterday's driving school at Summit Point.

First of all I'll say I don't consider myself a hotshot (used to, but now I'm older and know better). I did a track day last year in an E36 M3 and so I'll run some comparisons with that.

- It's more understeery than the old M3, courtesy of an even more staggered setup (225/255). That of course makes it more forgiving since you can always scrub some speed if you let it do its thing. But it also means you need to coax it a little more to cause it to rotate nicely through some corners. Bottom line: I didn't care.

- It has a little more pitch, roll and lean due to softer springs. I was not bothered by it, since the upshot is a more comfortable street ride and excellent bump absorbtion.

- Excellent brakes. At my skill level they were perfect and I could not say they were better or worse than the M3. Not sure at a higher skill level...

- Less low end torque, but a murderous upper range. From 6k RPM on up it moves absolutely brilliantly. The 00 M Coupe I was chasing would walk away initially, only to be reeled in at around 90 mph. For rapid progress, downshifting is a must.

- Less snappy transition to oversteer. This made the car easier to control. Maybe experienced track hounds would be bored to tears by the slowness of its responses, but I liked this trait better.

- Badly needs a LSD. When really scooting I could hear the tires chirping in some corner exits which never happened with the M. I might look into one later on. Oh BTW I disabled the first level of DSC, but not the second (I thought the second one acts like some electronic version of LSD).

All in all, I had a blast. The no-braking exercise was a real eye opener, spoiled only by that tense moment when the annoying S4 in front of me screwed up and hit the brakes :). Skidpad was a blast - I am now starting to get the hang of controlled oversteer (of course I can only control it for 2-3 seconds right now :), but it was great fun anyway).

I chose to drive the course in 3rd gear because the engine is fairly new and I didn't want to have some nasty surprises. Even driving in 3rd, in a car that's likely somewhat slower, I was able to gain about 2-3 seconds compared to last year. I attribute this to the extra track time and the less edgier responses of the ZHP which for average guys like me makes it easier to control.

Next time I'll pump up the front tires a little more: at 35/40 I thought they were a little soft.

Cars that I passed included M Coupe, modified Audi S4, modified RX-7, modified 2002. Cars that passed me included WRX, Evo 8, M5, highly modified Golf VR6 and a lightly modified Audi A4 (!). This taught me that driver matters a great deal (the A4 was down in power and maybe handling but still faster) but only up to a point: the M5 was passing me on sheer power/grip alone even though his line was extremely bad.

If I were to pick a track/fun car today, it would be the Evo 8. That car was WAY faster than everything else in my group, fact confirmed by my instructor as well. I was very impressed.

These are my honest opinions here: I am not saying they are undisputed fact. I ask those of you with more track experience to look upon these statements with patience and kindness :).

That's all I can think of right now, but if you have specific questions ask away...

adc
03 330 ZHP

PS: Some people wanted pictures of clears on Imola: sorry I don't have better pics, I didn't have time to take others...

Jeff_DML
08-11-2003, 01:59 PM
sounds like fun. :thumbup:

Oh BTW I disabled the first level of DSC, but not the second (I thought the second one acts like some electronic version of LSD).


I turn off the electronic LSD when I track. I uses your brakes to emulate a LSD which I dont think is good :thumbdwn:

mbr129
08-11-2003, 02:01 PM
NICE!

Good to see an Imola ZHP in action! :thumbup: :D

I will be taking my first driving school in October. I can't wait. My shifting has improved tremendously in only 6 weeks, so another couple of months should help out (this is my 1st stick-shift car).

I will be going to an Autox event this Saturday to just check it out and see what it is like but I wont drive in it (registration had closed by the time I felt comfortable enough to sign up).

Just curious... how many miles on your car? Call me a wuss, but I just crossed over 4000 miles and I am yet to rev past 6000. I am just afraid my commute is not long enough to get my car warmed up enough. :eeps:

adc
08-11-2003, 02:12 PM
Here is the extra lean that I felt in the corners. The transitions were very nice though.

Forgot to mention: the friend who bought the M3 from me a couple of months ago was there too, his first track day. He had a blast and apparently did very well in the novice group.

Mystikal
08-11-2003, 02:16 PM
As much as you defend the understeer, an increase of tire pressure to at least what's in the back will help you out immensely. If you still need further balancing, go for a set of adjustable sways.

You may know all that already, but just throwing out some suggestions. I hate understeer. :D Oh, and the car looks incredible. Great writeup, too. :thumbup:

adc
08-11-2003, 02:24 PM
As much as you defend the understeer, an increase of tire pressure to at least what's in the back will help you out immensely. If you still need further balancing, go for a set of adjustable sways.


No, no, I get it :). I guess I was describing 2 different things:
1. The suspension is a little softer, more street oriented. This makes the transition to oversteer very smooth and predictable. (of course, it also has other disadvantages on track).

2. The car undesteers more by default, which helped me fix some badly managed corners. I know understeer never helps an experienced driver, it just helped me on this particular day (and especially for the no-braking exercise).

And yes, next time I'll increase the pressure up front and hope for a smaller helping of understeer. I was even thinking of bigger sways if that doesn't have a great effect, glad to see others have the same ideas.

Thanks for your suggestions...

adc

Akakubi
08-11-2003, 03:26 PM
Sounds like fun! Thanks for sharing! :thumbup:

Put more air in the fronts compared to the rears. That should neutralize the effect of understeer a bit. But in the future, get wider fronts to compensate. :D

Tanin
08-11-2003, 04:59 PM
No, no, I get it :). . I was even thinking of bigger sways if that doesn't have a great effect
adc

I just ordered a ZHP.

I currently drive a 330i SP and I put RD Sways that help alot. I was going to take them off and sell them. In your opinon does the ZHP need them also.

If so, I might as well hold onto them.

Mystikal
08-11-2003, 05:27 PM
I just ordered a ZHP.

I currently drive a 330i SP and I put RD Sways that help alot. I was going to take them off and sell them. In your opinon does the ZHP need them also.

If so, I might as well hold onto them.

I don't see them depreciating much in time. Keep them for now.

Tanin
08-11-2003, 11:39 PM
I don't see them depreciating much in time. Keep them for now.


Good point.

Andy
08-12-2003, 07:01 AM
adc,

Thank you for your post. I really enjoyed reading it. I have never autocrossed before... but I am sooooo wanting to now!!

KU Ned
08-12-2003, 08:24 AM
- It's more understeery than the old M3, courtesy of an even more staggered setup (225/255). That of course makes it more forgiving since you can always scrub some speed if you let it do its thing. But it also means you need to coax it a little more to cause it to rotate nicely through some corners. Bottom line: I didn't care.
The understeer is why I use 235's on 17 inch wheels on all 4 corners. In the one auto-X and one drivers's school that I have driven in the understeer was virtually non-existent. It also allows me to rotate the tires to save rubber. If you decide to buy an extra set of rims for the track and/or snow, go with the same size front and rear. - It has a little more pitch, roll and lean due to softer springs. I was not bothered by it, since the upshot is a more comfortable street ride and excellent bump absorbtion.
I am considering getting a stiffer set of springs to reduce lean. But even with the lean, the car is much better than 90% of the cars at the drivers' event I attended. - Excellent brakes. At my skill level they were perfect and I could not say they were better or worse than the M3. Not sure at a higher skill level...I always think BMW owners that "upgrade" their brakes are crazy. Very few of us need the extra 2-3 feet that a bigger brake kit might get entering a corner. - Less low end torque, but a murderous upper range. From 6k RPM on up it moves absolutely brilliantly. The 00 M Coupe I was chasing would walk away initially, only to be reeled in at around 90 mph. For rapid progress, downshifting is a must.
I had the exact same experience chasing an M Coupe. - Badly needs a LSD. When really scooting I could hear the tires chirping in some corner exits which never happened with the M. I might look into one later on. Oh BTW I disabled the first level of DSC, but not the second (I thought the second one acts like some electronic version of LSD).
Next time turn DSC completely off. It still limits your cornering speed.

All in all I agree with you. The ZHP is a great daily driver that is a blast on the track. I am more and more happy with my decision to get the ZHP everyday!!

adc
08-12-2003, 09:23 AM
The understeer is why I use 235's on 17 inch wheels on all 4 corners. In the one auto-X and one drivers's school that I have driven in the understeer was virtually non-existent. It also allows me to rotate the tires to save rubber. If you decide to buy an extra set of rims for the track and/or snow, go with the same size front and rear.


Got it. I'm not quite there yet to commit to a set of track wheels and tires, but might be in a couple of years. In the meantime I'll try to play with tire pressures and see where it gets me...

I am considering getting a stiffer set of springs to reduce lean.
Have you considered slightly bigger sways? I think the combination of shocks and springs is very well matched and was wondering if stiffer springs would upset this.

But even with the lean, the car is much better than 90% of the cars at the drivers' event I attended.

Absolutely agree with you. I am painfully aware how much better I have to become before needing a better car.

Next time turn DSC completely off. It still limits your cornering speed.

I'll try that. I feel a little more confident now so I'll try experimenting more next time. Tire pressures and DSC will be the first ones to play with.

All in all I agree with you. The ZHP is a great daily driver that is a blast on the track. I am more and more happy with my decision to get the ZHP everyday!!

Yes, it's a fabulous car. All in all a little softer than an M, but soooo close in capabilities as to make no difference for my track prowess. The added comfort (not to mention the extra 2 doors!) just makes it all sweeter.

Thanks for your comments and insights, they helped me a lot.

adc
03 330 ZHP

KU Ned
08-12-2003, 11:14 AM
adc

I should consider larger sways. I played around with an instructor in a 330Ci with R&D springs that was really flat around the turns.

You will like running with DSC off alot better than just 1/2 off. You will not bog down in tight turns and you can fine tune your turns with throttle imput much easier.

Here is the link to a thread I started about my ZHP on the track:

http://www.bimmerfest.com/forums/showthread.php?t=36848