As much as you can get and still hook. I run 10.53 SLR with 10.5Wx31 tire. Car has 54% on the nose. Mid 1.2x 60ft foot braking. it took awhile but it is pretty consistent. Doug
I would agree with this but add "and not go on the back bumper "!
Really depends on weight and power. Power adder combos can and need to run lower SLR's to manage the car at the hit.
