SBC engine:If one were to have incorrect pushrods/geometry,how much power would be left on the table?If the block is decked and the heads were cut a bit and the rod length ended up long by 0.060 or so,8-15hp? how about if you used +.100 valves and std length pushrods. Would the lifters in a hyd setup makes up some of the difference?Or is proper geometry more of a durability issue if things are close? I can see and understand a problem if the geometry is way off like .100,but 0.20-0.030? any actual dyno tested data?
Thanks

I wouldn't be so worried about hp loss as I would engine damage. A buddy of mine had the wrong length pushrods on his small block. He drove it a couple years this way. Then he started breaking rocker arm studs. Turns out the wrong lenth studs caused ever so slight a binding at one end of travel. He broke 2 studs before he got things figured out. It didn't hurt any other part of the engine but twice he was changing rocker studs along side the road.

Improper geometry can take it's toll on the valve guides.

Improper geometry can take it's toll on the valve guides.
I understand the wear/sideloading the guide issue.But any real factual data like a back to back dyno test with right and wrong pushrods?

If the geomety is off enough to lose valve life potentially you will lose HP, but it's unlikely anyone's done a back to back test.