[Aubrey N Bruneau]

Lots, Todd....
250+ seat / 470+ open... .508" / .516" lift mechanical ( .014" / .018" lash ).

In my conversation with the fellow from Performance Research, he suggested that my spring pressure may not cure the problem, but rather it could be due to the "frequency" / harmonics.
I'm going to be sending him a complete "package" that runs on my cam. He says they have a spintron / computer setup / program that will identify the issue ( if any ), and provide the info needed to correct it. Variable rate valve springs, with actually LESS pressure.
Less pressure makes me happy !

Like I said.... I will be going to the tool steel parts.
Decided to replace pistons too. At the end of the honing, I will be at .075" over, and WAY too much piston-to-wall ( .012" - .013" ). I like .009"

Thanks Todd