07-08-2017, 12:39 AM | #1 |
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Tire pressures for track day
So I'm looking forward to my first track day and was wondering if or how I ought to alter my stock Pirelli summer tire pressures for best performance.
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07-08-2017, 01:29 AM | #2 |
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Believe that if you open the drivers side door it says the right tire pressure for below 100 mph or above. I think it's the yellow sticker.
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07-08-2017, 01:33 AM | #3 |
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07-08-2017, 02:28 AM | #4 | |
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I was particularly wondering if cornering would be improved by going _down_ in pressure a few psi. |
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07-08-2017, 10:54 PM | #5 |
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Good to see you heading out for a track event. I was at PR yesterday with the ACNW group and ran my Bridgestones in the low 30s. If you're running with the BMW club next week, I would ask Jeff Butler who puts on/helps out with the event, his recommendation.
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07-08-2017, 11:01 PM | #6 | |
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07-09-2017, 01:18 AM | #7 |
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Dont worry about it too much. Set them at the OEM pressures and then listen to your instructor. As the day progresses you'll be letting air out as the tires heat up and pressure increases. On your first track day you'll be concerned more with learning the line and learning how to brake than extracting much performance out of the car. If the tires are especially stiff or soft your instructor may advise you to adjust the PSI's accordingly if the sidewalls are rolling on you, but overall just set em to OEM and watch/learn how they behave as they get heat into em.
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07-09-2017, 02:44 AM | #8 | |
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07-10-2017, 07:37 PM | #9 | |
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with my original 225/45/18 and 255/40/18 MPSS tires, i typically dropped my PSI from 34 cold to about 30 cold PSI for my track days they would usually heat up to 37-38 PSI during the actual runs i haven't done a track day with my MP4S 245/40/18 square setup yet but i just did 2 autocross days i started off at 36 PSI all around and eventually let out the air to be 38 PSI when hot when the tires cooled, i was at 30.5-31 PSI
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07-14-2017, 12:22 PM | #10 | ||
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07-17-2017, 02:21 PM | #11 | |
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Figuring out good starting pressures depends on many variables - first and foremost, your specific tires and sizes - but a typical hot tire pressure target is 38psi. So if you're running in hot summer weather, then starting at around 30-32 psi "cold" is a safe bet.
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10-03-2017, 02:39 PM | #12 | |
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There are little triangles along the sidewall. The tire shoulder should roll enough to just clip the tops of the triangles. If the wear is well above the triangle, decrease presure to let the sidewalls roll more, well below increase pressure to stiffen up. |
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