Originally Posted By polyspheric
At that lift, the rocker arm is pointing nearly up & down every rotation (this is a function of lever length vs. lift, nothing to do with ratio).
Life expectancy...?


Very good point. I mentioned to Jack that when you turn the motor over to check lash it looks like your falling off a cliff at that lift on 59 degree deal. Like he said, lift is more like 740 after deflection.
For reference, i ran a 700 roller 7500 pm for years( and often) and never had issue with anything. Ultra bulletproof stuff( Jesel, etc, etc) but valvetrain was never broken.... never spit a pushrod, adj backed off, lash issue. Quiet as a church mouse

Last edited by B3422W5; 09/25/18 09:35 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8