I agree with Roadkill, they are not a drag tire. Any tire will work with good track prep, don't confuse Kumhos on a prepped track as the tire providing the traction.
I have run kumhos at around 20 to 22 psi, 3 to 4 sec burnout, depends on the track though, i have run 2.0 60' launching at 2500 rpm at some tracks and, i have run 1.7 60' launching at 4000 rpm, i do not suggest launching at 4000 unless car is hooking up, that particular day i was not spinning at all and the car was bogging down off the line.
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