we got one guy sayin 5, another 7, another 9...ok...

run 35+ psi


everymotor is different. You 100k mile manual tranny motor might let go at 7 psi where as a easy driven automatic H22 might last longer. It's a guessing game. I say start off at 5. get it tuned see where ur numbers are. Might be able to go to 7 thats about it.