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My 60' time got worse when I lowered my pressure from 15 to 12, 15 psi seemed to be the optimum pressure for the track and as far as the street goes, I just ran them at 35 psi cold.
You guys run pretty low though I have heard of lower. Is that 15 -17lbs hot or cold ? I usually run 20lbs hot at the track. I'll have to give those lower pressures a try.
I run 15-17 hot. I was running at 20 till someone recommended I 15/16... I tried it dropped my 60's about .05 fairly consistantly so I've stuck with it.
geez i run 25 psi and have no spin launching around 3k. I cut low 1.7 60's w/o much of an effort and no spin. run as much psi as u can w/o spnning. You will trap higher.
dave