We autocrossed in Boise, Id. this weekend. The first day the morn temp was 40 warming to 65 in the aft. The car worked very well, I only had to soften the rear shocks two clicks because of a little wheel spin on excelleration.

We finished 8th overall fastest time out of 93 drivers and 9th in Pacs.

The 2nd Day morn temp was 20 deg and aft only got to 35. We couldn't even roll the throttle on without wheel spin and had severe oversteer on high speed turns and slight understeer on slower turns ( maybe driver error).

I softened the shocks 4 clicks frt & Rear. lowered air press frt & rear 2 lbs and then tried raising tire press 2lbs from our starting pressures. I only managed to eliminate the understeer at slow turns ( maybe driver adjustment). Tried traction control on but settled on Comp mode with a smoooooth steering and throttle imput. Ran the whole course in 2nd gear.
All Corvettes and high hp cars were having problems with rear whl traction, but we were the worst!!

We have a 04 ZO6 w/Phaft shocks and SS Sway bar. If I would of had the time I would of filled the fuel tank all the way, we were running 1/2 t0 1/3 tank.

We dropped to 35 in overall time and worse in pacs. Of course the all whl dr cars did well and also the low hp stockers.

What should I of done? even more air press?, even Less air press?

Was running 295 710"s frt with 32psi and 315 710"s with 28psi The car has comp alignment and cross weighted

Any sugestions?

Thanks
DGoetz