Ruined cam - how?

[txarkitekt]

Coil bind or excessive spring pressure can cause that type of failure.

First thought...

....that is what leads me to believe it is a lubrication issue.
Could be like RED said.....regrind cam....along with incorrect pushrods and coil binding. Let us know what you determine!

Second thought...dammit guys--got to this post before I could say something--but good advice! Yes, on a regrind, the heat treat on the lobes make it harder--and with it being ground off in certain sections, it makes it susceptible to ruining the roller on the lifter. I saw this happen to Alan's cam when we tore down his motor...the cam lobe got flattened out because of oil starvation (because the lifter was not articulating up and down properly) and the roller from the lifter just sat on the cam lobe and it mushroomed the lifter.

This was a soft cam and the wear broke the lifter.

Exactly. Regrind cam...ruined lifters. Also a possibility of lubrication starvation at some point. I now honestly don't think there was excessive bind from the valve springs or wrong sized pushrods. It has all to do with a soft cam (and it having the XER lobes which = high ramp rates) and ended up messing up the lifters. You are going at it the right way Allen... If you are doing an LS6 cam, the P springs may be too much...good call on the LS6 springs or 918s...