How much does car weigh ?...one thing for sure the more Air you can run without blowing them off the faster and more stable the car will be.
Please understand Tire pressure is A fine tunning effort, much like the 4 link..it doesn't take much adjustment either way to see results....so when your experimenting with the pressure..1/2 lbs at a time...is safe...and when you get close 1/4 lbs count...( digital gauges are best for accuracy)
check the pressure while your in stagging just before your Run....DO NOT check them and let it sit there in the SUN...block the tire from the sun.
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "