Cam-lifter break in methods....open valve spring pressure
 

OK.......we have done all the necessary pains to not wipe the cam out at break in time....the cam is coated and polished, the tool steel lifters are coated, the open spring pressure is 400 lbs.......is there a minimum spring pressure that requires a light spring break in and then the heavier spring or is changing springs required on any open spring pressure regardless of how low the spring pressure ???

Re: Cam-lifter break in methods....open valve spring pressur
 

My take on it is that running low/OEM type pressures is extra insurance for break in. The tool steel lifters themselves help as well. But personally I have always swapped springs with anything over 300lbs open when I ran conventional lifters. I've been running the Schubeck/Smith lifters for many years now without issues. (Knock on wood!:p ).

With all the variables, it's difficult to but a "safe" minimum/maximum number on the pressures for break in. Opinions may vary too. Play it safe.