Solid rollers with off set push rod hole issue.

gg408 said
Thank you all for the replies.
The damage on the lifter is on the opening side of the ramp just before the top. The lifter bores where bushed for flat tappet solid lifers that measured .904"and these BAM lifters measure .903", so the clearance is about .0028" atm with the BAM's.
Spring pressure are 255 lbs on seat and 560lbs over the nose.
Cam specs are 255/262 deg @ .050", 112 lobe sep, lobe lift .399'intake .409'exhaust with 1.5 rockers.
All intake lobes have same wear pattern , runs on one side lobe , runs flat across the top then runs on the opposite side of the lobe going down. its as if its trying to turn twist the lifter.
This has me stumped

That’s not that low of spring load, but RPM and valve train weight matter.

Every time I’ve seen that the valve train is not happy. And the heat treat was off. Of course, the cam grinders will never say the core was heat treated wrong.

You have to send it to a 3rd party and have them test it if you really want to know.

Sometimes something as simple as lowering or raising spring pressure will clean it up. Or a stiffer pushrod. Or even a different retainer.