Factor in gonna chew through tires at a lower pressure.
Dunlop, 21 cold, 23 hot is what I run on track.
I run 20 psi on our B King using a Shinko Hook up tire with zero spin on a properly prepped track running mid 9 sec passes.
Chassis setup will play into it also, we are 5" over wheelbase/lowering links and strapped front end.