986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Another First Auto-X & Tire pres questions

jb92563 · 12-01-2012, 10:33 PM

Did my first Autocross recently, it was blast!.

The instuctor mentioned that the rear tires were not "Locking Up" and said I might want to adjust the tire pressure.

We did not get a chance to make adjustments so i never found out how.

Any guidlines on how to adjust tire pressures when they could use some tweaking to get better perfomance?

I was running 32psi front and 36psi rear on Hankook V12's with 215mm wide front and 265mm wide in the rear.

Seems my rears where breaking away a bit too early so I could not take full advantage of my manueverabilty and speed in the curves and had to slow up too much.

I guess I need a bigger contact patch in the rear to help it stay attached to the ground.....more or less psi?

12-01-2012, 10:33 PM	#1
jb92563 Registered User Join Date: Apr 2012 Location: Riverside, CA Posts: 1,665	Another First Auto-X & Tire pres questions Did my first Autocross recently, it was blast!. The instuctor mentioned that the rear tires were not "Locking Up" and said I might want to adjust the tire pressure. We did not get a chance to make adjustments so i never found out how. Any guidlines on how to adjust tire pressures when they could use some tweaking to get better perfomance? I was running 32psi front and 36psi rear on Hankook V12's with 215mm wide front and 265mm wide in the rear. Seems my rears where breaking away a bit too early so I could not take full advantage of my manueverabilty and speed in the curves and had to slow up too much. I guess I need a bigger contact patch in the rear to help it stay attached to the ground.....more or less psi? __________________ "It broke because it wants to be Upgraded " 2012 Porsche Performance Driving School - SanDiego region 2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP, Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)