Solid roller lifters...

Miszny said

I think the biggest problem is too weak spring, roller gets hammered by the cam and this gets you in trouble. I saw 15% open pressure drop on spring in 3 seasons time. They went from 620lbs installed to 530lbs and killed cam + 3 lifters. Damage was consistent on all the lifters.

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You might really want to look into cryogenic treatment on the springs. I have at minimum my springs and rocker arms treated on all my engines. The harder the intended use the more components I have treated. On my 499" engine I even had the Victor intake treated to relieve the casting stress since I knew it was going to get heavily ported and I didn't want it cracking later.

In the link below you can see a short video from Circle City Cryogenics that has my K-Motion valve springs, a USPS box with my rocker arms hanging out, and my Victor intake getting the -300 degree treatment.


The process makes the valve springs last without loosing pressure over time.

Tom