Tight lash cams, .020 or tighter when hot, can not be ran safely with NO more than 25% tighter lash when hot. I use the old rule that if the motor likes less lash at the track on back to back runs then it needs a bigger camshaft work
I've seen tighter lash work better as well as not working as good on engines on the dyno and at the track also, it depends on the combination normally shruggy

Last edited by Cab_Burge; 12/10/19 06:54 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)