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06-21-2021, 09:32 AM | #1 |
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trackday setup question
Hi all,
as posted i have following setup on my Z4M Coupe: KW Suspension with ~500/600 lbs (linear) F: ~3° R: ~2° camber F: ~0°2' R: ~0°6' toe (sum) original anti rollbars the car is good on corner entrance and exit but the midcorner speed is not at an optimum ... on different semislicks ... (e.g. R888R, Cup2 ...) what could be the problem ? is it recommended to change der anti rollbar when you change the springrates ? thx for help vom Austria (no kangaroo ) Enzo |
06-22-2021, 12:28 AM | #3 |
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07-07-2021, 07:31 AM | #5 | |
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Drives: 08 Z4 M Coupe
Join Date: Apr 2019
Location: Greenville, SC
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At your next track day ask around with the instructors and see if someone can help you dial in your setup. If you're happy with corner entry and corner exit, then you're likely down to fine tuning the dampeners.
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'08 Z4M Coupe | Space Grey/Imola Red Extended/Carbon Leather | Eventuri Intake | Strömung Exhaust | Strong Strut Front/Rear Braces | 19" E46 M3 ZCP Wheels
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07-23-2021, 09:30 AM | #6 | |
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Note that this means that if it is cold or raining (basically a normal summer day in central Europe), that you are going to have to INCREASE your pressures to guarantee the target hot temperature. I might have run across your buddy. She has since moved on, but AFAIK, my younger sister has been Michelin's only female test driver in NA. |
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07-27-2021, 12:18 AM | #7 |
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Very stupid question... Do you have traction control on?
And separate to my above question... (39 psi?? Wait.. what????... This is absolutely waaaaay to high..) Nothing wrong with Kangaroos Enzo, as long as you dont get them on your hood. Last edited by Vanne; 07-27-2021 at 12:27 AM.. |
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07-27-2021, 04:02 PM | #8 | |
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The reason that the manufacturers are specifying a hot pressure are as follows: 1. Hot temperatures are the operating temperature. This is the temperature which optimizes the contact patch, sidewall roll-over and the compound's ability to grip. 2. Setting your cold pressures to 32psi on a freezing day is going to yield a different hot pressure than 32psi on a 90deg day. 3. Hot pressures will be affected by driving style, course material and temperature and whether it's wet or not. |
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07-29-2021, 03:13 PM | #9 |
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You should be deflating again after coming off the track a few laps, pull in and deflate again to around 28-29, do this twice and then get on it. Unless you have a real time tpms system your not going to know your running hot psi values. 28 is a great starting point.
If your running with traction control on, you won't be getting ANY mid corner performance, or any corner performance for that matter. |
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