Against my better judgment, I'm considering taking autocross vaguely seriously this year. Weather permitting ("vaguely seriously" means, among other things, that I will avoid events where rain is likely, which happens a lot around here), tomorrow's my first event this year.

I can't remember correct tire pressures, so I'm asking for experience folks to chime in, if they would.

Car: 2004 S2000
Class: B Stock
Setup: Koni Yellows revalved for the S2000; Gendron middle bar, at middle stiffness; otherwise completely stock. Camber should be approximately -1.75 front; -2.5 rear.
Tires: Kumho V710, 245/45-17 front; 275/40-17 rear.

My memory is that I found last year that lower pressures work better than I had thought, and I had worked my way down to about 29 psi. But I don't keep written notes for autox like I do for real racing, so I am not at all sure.

Thanks!

 

Wow 29psi is low! I don't think I ran it that low and especially up front where the higher pressures give better feedback.

b-stock will be interesting this year. All the top drivers dropped it in favor of STR in our region.

 

In cooler weather (50 deg and cooler) ive been runnin 28r 29f on my 255 dunlops on my STR car... so that may not be off by much, It has been my experience that the s2k seems to like low pressures.