360 magnum max safe valve spring pressure

Print Thread

360 magnum max safe valve spring pressure #2567469 10/21/18 09:00 PM 10/21/18 09:00 PM
Joined: Jan 2003 Posts: 1,908 Nebraska 4 4406bbl OP top fuel
4406bbl OP top fuel 4 Joined: Jan 2003 Posts: 1,908 Nebraska	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? Last edited by 4406bbl; 10/21/18 09:01 PM.

Re: 360 magnum max safe valve spring pressure [Re: 4406bbl] #2567543 10/21/18 11:31 PM 10/21/18 11:31 PM
Joined: Jan 2005 Posts: 3,635 Oakland, MI D dizuster master
dizuster master D Joined: Jan 2005 Posts: 3,635 Oakland, MI	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.

Hop To