360 magnum max safe valve spring pressure

Posted By: 4406bbl

360 magnum max safe valve spring pressure - 10/22/18 01:00 AM

What is safe with new original hydraulic roller lifters? Mild cam
550 lift, I have heard 350-360 pounds max. Anyone run more with no problems, or run less and had problems?

Posted By: dizuster

Re: 360 magnum max safe valve spring pressure - 10/22/18 03:31 AM

I ran mine at 370lbs and .550" lift. It wouldn't make as much RPM as I had hoped. So I shimmied the lifters to near solid (ONLY .025" of plunger travel), and put 440lbs springs on it. Didn't change a damn thing with the RPM...

That to me was a true test, meaning at 370lbs it wasn't floating a valve or collapsing the lifter.