Quote:
2. increased wall thickness is far less effective, only do this when #1 is not possible.
Easy comparo for pushrod wall thickness: it's pretty close (never exactly) to new ÷ old.
.120" ÷ .083" = 45% stiffer
That estimation isn't even close. I'm calculate that with a .375 OD pushrod going from a wall thickness of .083 to .120 (or an ID of .209 to .135) the increase stiffness is just 9%. And considering the additional mass one would be adding to the valve train I would say it isn't worth it!
moment of inertia = pi(OD^4-ID^4)/64. ID^4 is the killer.
Last edited by bwdst6; 11/10/10 02:59 PM.
