[Too Many Projects]

Originally Posted by 169indy

My Solid lifter motor builder performed Cam break in with reduced valve springs as a measure to assure free spining lifters during the critical break in period on the dyno. The n installed the inner springs to perform power pulls.

That IS the recommended procedure by some cam manufacturers too. The guy I've had build a few engines does that too. He has a very low cam failure rate and usually it happens after the first oil change when the owner fails to head his instructions on what oil to use.