This method is where you select the push rod length so that the tip of
the rocker rolls from one side of the center of the valve stem to the
other as the valve goes from fully closed to fully open. You try to
select a push rod that gives you a tip travel that is symmetrical about
the center of the stem for the two extremes of valve position.
Unfortunately I only have a little over 1/4" of the threads of the
rocker stud engaged when everything is correctly adjusted. I can't
understand what could be wrong here. One of the pieces of this puzzle
must be incorrectly manufactured or the .25" must be in tolerance. I
guess I'll be calling Comp Cams tomorrow to see what they have to say
about this.
Frank
> -----Original Message-----
> From: Bob Palmer [mailto:rpalmer@ucsd.edu]
> Subject: RE: Poly lock grip question
> Frank,
>
> The rule I've been taught is that you achieve full strength
> when the threaded depth of a bolt is equal to its diameter.
> That would mean either 3/8" or 7/16" in your case. This
> assumes the threads are in good shape of course. I'd
> recommend about 1/2" just to be safe.
>
> So, what is the "roll over symmetry method"? Does this means
> that the rocker arm is at the 90-degree point half way
> between fully opened and fully closed?
> Bob Palmer
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