Yes it does, thanks. At lifter swap time I will look for the longer lifters, and go with shorter pushrods. We've seen evidence in my stuff of significant pushrod flex with the std Comp 5/16" pushrods that are common, thus the 3/8" HD wall thickness Smith Bros this time around. In fact the pushrods had been divoting the head gaskets pretty hard, over a 1/4" away lol. That's pretty bendy I'd say. It seemed to be mainly the exhaust side doing it. I've run wot cylinder pressure tests that show the cyl pressure to still be around the 200-300 psi or so range at EVO. Taking the area of the EV head times that pressure (minus the exh backpressure on the other side of the head) gives the net "holding" force on the valve, holding it closed due to gas pressure. Add in the spring seat pressure, multiply that sum by the rocker ratio of 1.65 in my case and the force required to pop the EV off it's seat at that point is well into the 1000 lbs neighborhood. No wonder they want to flex, lol...
PS do you do anything special with the washer, extra hardened or whatever to make sure it does not get "crushed" after a few heat cycles and thus lose bolt clamping force on the stackup assy?
Speaking of rockers, I have a cherry set of 1.75 ratio T&D rockers for the GN1 individual shafts/cyl setup. Anyone here want to trade for a cherry set of 1.55 ratio? I used them on a flat tappet setup; it's roller from here out so no longer need them.
TurboTR
PS do you do anything special with the washer, extra hardened or whatever to make sure it does not get "crushed" after a few heat cycles and thus lose bolt clamping force on the stackup assy?
Speaking of rockers, I have a cherry set of 1.75 ratio T&D rockers for the GN1 individual shafts/cyl setup. Anyone here want to trade for a cherry set of 1.55 ratio? I used them on a flat tappet setup; it's roller from here out so no longer need them.
TurboTR
