The Official 370Z Autocross Thread

[redline10000]

Hi guys I need some help. I just got a set of Re71r 18/275/35 tires on 18x 9.5 and 18x10 rims. I have -2.7 camber up front with -2 in rear. One thing that I am seeing is that I am not getting the tires to roll all the way over to the edge in the front or rear. I have my fonts at about 33psi and rears at 27. Question is can I keep going lower in pressure to get roll over? Or will my contact patch suffer from too low psi? I dont have a pyrometer to help me at the moment.

[gomer_110]

Originally Posted by redline10000

Hi guys I need some help. I just got a set of Re71r 18/275/35 tires on 18x 9.5 and 18x10 rims. I have -2.7 camber up front with -2 in rear. One thing that I am seeing is that I am not getting the tires to roll all the way over to the edge in the front or rear. I have my fonts at about 33psi and rears at 27. Question is can I keep going lower in pressure to get roll over? Or will my contact patch suffer from too low psi? I dont have a pyrometer to help me at the moment.

Tires with really stiff sidewalls can sometimes mask rollover. I probably would't go any lower than you are already. fwiw I run ~34 front and 28 rear on Hoosiers

Your best bet would be to get you hands on a tire pyrometer.

[redline10000]

Originally Posted by gomer_110

Tires with really stiff sidewalls can sometimes mask rollover. I probably would't go any lower than you are already. fwiw I run ~34 front and 28 rear on Hoosiers

Your best bet would be to get you hands on a tire pyrometer.

Thanks for the advice there. I will try using my infrared thermometer. I know its not ideal but it was free :-).