In autox-ing the courses are short and mostly tight. It take around under 1 minute mostly. Not enough time for tires to get up to working temperature.
Eg usually the ideal working temp for 16" AD07 are 32-34 psi. From cold they would increase 2-3 psi over say a lap of SIC (5.56km)
So the ideal setting during autocross is to pump it from cold at the working temperature that suits the driver.
For me in a Satria R3 I'd pump it 33 front and 40 rear(easier around those tight hairpins and for hand brake turns.