You studied this thread real good, didn't you?
Read First: A Novice Guide to Autocross
Originally Posted by Mave
I used low tire pressure (30lbs) front and rear because the higher the pressure the more sliding I did (including a complete 180 with a stall).
30 psi...in the front?
What tires are you on?
I'd roll my RT-615s right off the rim at those low of pressures.
38-40 is the minimum I'll run up front, but more often than not, i'm at 43-45psi cold.
Here's a great discussion we had on the subject:
Alignment and Tire Pressure for Auto-X