stamped steel rocker arm delection

[Alan Roehrich]

Chris, I never said the rocker was not a problem. It is, but there's not a lot you're going to do about it. All we can do in Stock is to work on what they let us.

The calmer you make the pushrod, the less harmonics it transfers to the rest of the valvetrain, especially the rocker. The stiffer you make the pushrod, the less it acts like a spring. The less the pushrod acts like a spring, the less of a beating the rest of the valvetrain takes. If you can stop or reduce the spring effects the pushrod drives into the rocker, you can calm the rocker as well.

[Adger Smith]

To add to what Arnold said: I have found valves that are actually acting like a springboard when they hit the seat. ( close inspection of the valve and valve seats will show it) When the problems start there it is almost impossible to stop. Valve material and design is usually the problem when a valve acts like a springboard.

[Mark Lewis]

Which flexes less, late model rail type rockers or the old style sb rocker? I know a stiffer pushrod helps and guide plates help control also, but you can't use guideplates with rail rockers i believe.

[Alan Roehrich]

Mark, just to hazard a guess, I'd say the premium aftermarket stamped rockers for 7/16" studs are probably the stiffest, due to materials. I really don't much care for the rail rockers, I prefer the guide plates and 3/8" pushrods myself.