I tried from 18 lbs to 36 lbs. in the rear tires and my best results were with 30lbs in the dirvers tire and 28 lbs in the passenger. This is with PS2's. Yes, I even tried different pressures on each side. Now I'm running Pilot Sport Cups but I haven't be to the 1/4 mile with them. They spin real easy when cold. When they are hot, they really stick.

Les