apex2k

I have my second autocross coming up on Sunday and I am curious about tire pressures. Many an autocross guide suggests 40 p.s.i. (which I ran last time with what I consider decent results for a first-timer) but I assume Honda recommends 32 p.s.i. for a reason. I am doing autocross to get a feel for the road-going stock setup, more than anything else, so R-compound tires are not an issue. That being said, I would still like to be competitive as possible. Any input would be appreciated.

glagola1

Just run 32 to 36. Tire pressures don't matter that much when you are novice anway. Just concentrate on the driving... not the fooling around with the air guage.

FWIW, I run 34 on the street and I noticed a dramatic loss in grip going up to 37.

apex2k

glagola1,
I will be running A-Stock at Turner Field for the first time on Sunday and will give it a try. I am sure I will see you there?

Thanks,
Jeff (ConkerS2K)

TubeDriver

Run 33 rear and 36-37 front (cold psi). Honda's rec. is for typical street driving and comfort. The front s02s will roll over at 32. 40 is too high, you are just reducing your tread patch contact at that psi.

glagola1

He may be right about the higher pressures up front. I never got the chance to push those bicycle wheels we have up front before I switched to R-comps.

I do know that the rears like 32-34.

Yeah, I'll be there as always.

mikegarrison

Are you guys talking hot or cold? (Or does it not matter in the autox world, because the tires don't get hot?)

TubeDriver

cold psi for me (usually they tires have some heat by the third run).

33 rear and 36-37 front (COLD)

apex2k

This sounds logical and I am looking forward to having a go at it as the weather is supposed to be great. There will be several S2000s running OEM rubber so it should be a pretty level playing field. Of course, then there are those damn Kumhos messing up everything. Thanks all.

1989 Chevrolet Corvette
Kuhmo 275/45-17

2000 Honda S2000
Kumho 225 F 225 R

2004 Honda S2000
Bridgestone 215/45/17f, 245/40/17r

2001 Honda S2000
Bridgestone SO2s 225/16

2003 Honda S2000
Bridgestone P225/50R-16

Cragspider

When I do run the S-02's I typically shoot for 37 up front and 35 in the rears to start off with. But I also mark the tires with paint to see if they roll at all then adjust the pressure as needed. It takes a little while for the stock tires to heat up, not as fast as R compounds but they do heat up.
Bryan

youngjun91

Anyone have recommendations for 2004+ RE050's? I ran last weekend with 36 front, 34 rear and was plowing like a farmer. My technique probably had something to do with it (didn't brake like I should have in some tighter corners), and the event was strangely shut down before I got a chance to readjust pressures. I think I will start with 35's all around this time and maybe even decrease the fronts if I need a little more rotation.

BTW, in the 2 autoxes I've participated in, I've not spun out once, although I got close once. I'm guessing it's a combination of not pushing hard enough and the 04 geometry.