hi guys,
the question might have been answered before, but if you don't mind answering it here again
i'm auto-xing this weekend, and need to know the right tire pressure for my car. the tire is bridgestone s-03, 205-50-15, and the stock size is actually 195-55-15. Last time I ran, I just left it at 35 in front, and 33 back (or the other way around, can't remember), but basically i left it at street pressure. I did pretty well for a first timer, but wondering if changing tire pressure would improve my time ?

thanks alot

 

What kind of car?

 

it's an ITR

 

You might want to try putting some shoe polish on your tires to check how much they are rolling over (especially the fronts). I have the same size S03s on my GS-R, and I just autoxed on them for the first time. Just as a guess I ran 38 front, 34 rear (cold). When hot they were about 40/36. They felt good and were wearing pretty evenly from the looks of it, although I never checked it with polish.

--buji

 

My brother has a 99GSR and at the autocross we ran yesterday he his S03s at 40fr/42r cold. First thing he said we he finished was that he found his pressures finally. He has a Type R rear sway bar, slightly stiffer springs and Bilstein HDs.