Spring Pressures. Solid roller lifter on a hyd roller cam.

yellow rose said
Does Crower have a spintron or do you rent time on one from time to time?

I've been screaming for years about guys letting spring pressures drop. It's a parts killer. I've seen valve locks cracked into mutineers pieces, fretting of the lock and retainer, lock grooves beat senseless, seats beat down, valve faces coined...you know what I'm say. And that's almost always traceable to low spring load.

Its all about the grind.
Some dont need 675-700+ open, some do.
Every cam company under the sun have their own required spring pressures to live according to them. Would love to hear from them as well... that would be interesting ...but look in your catalogs at the rec springs for fun.