Quote: ... closed pressure is 275#... open... just over 700#... 3/8"x0.089" wall pushrods.
Also wanted to mention that everything I've seen and heard re: pushrods these days is that yours aren't beefy enough for that much spring pressure / RPM / aggressive lobes.
It probably has nothing to do w/ breaking the shaft pedestals, but could definitely have an impact on valve train longevity. I think most engine builders I deal with would be suggesting at least .120" walls in a 3/8" diam. pushrod.
The pushrods seem OK I have not bent one, but they may be flexing? I was thinking of going to the 0.120 wall pushrods. Since I have the engine out, I am thinking of having deeper valve reliefs put in the pistons, re-balance it, and get a slightly larger cam like I originally planed. I went to a smaller cam when I noticed I would run into P-V clearance problems with the bigger cam.
