I tried 40 psi in front and 35 psi in back and it rotated pretty nice. I am going to try 45 psi in front next time and 37 psi in back, because the shoe polish was showing that the pressures should be slightly higher. Overall the autocross was great fun and I am going to next one as well. I am also going to stay with my same basic setup and develop my driving and get used to the car.