Was this built to be a bracket race type motor? (It was built to be a hot/street and strip engine.)
I don’t know what the first cam that failed was, but the as supplied springs aren’t suitable for anything hyd roller, other than maybe a stock replacement type cam.
I doubt this had anything to do with the collapsed lifter........ but it would be interesting to know how the conversation went with regards to how the engine would be used.......(The builder knew I was doing a hot street / strip motor for my 73 Roadrunner) and then the thought process behind retaining the as supplied springs when the decision was made to swap to the HR cam. The builder said he would test the springs to make sure they were within the spring pressure guidelines for the hy roller, a few days later he called me and said they were within specs, so I didn't need to change them.
I can’t imagine those little springs would have survived very long trying to maintain control of the now heavier valvetrain with repeated high rpm use.
What was the original cam anyway? The Original can was a Comp cams #20-225-4 .507/510 240/[email protected]
Is the current problem lifter “soft”, or “stuck”? soft
