RustyRatRod said

Ed I really think you can do what you're wantin to on a .903 lifter. You just aint found the right company yet. You call Howards?

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frosty_the_punk said

Performance trends has a program called "Engine Analyzer PRO" which has a theoretical minimum tappet diameter calculator that seems to be consistent (+ or - .001") with lobe grinds from several different cam manufacturers catalogues.

It takes into consideration the following.
Duration at any two of three lift specs (seat to seat, .050" or .200")
Max lift
Lash

I wish I knew the formula it uses to come up with these calculations.

Unfortunately the program itself is marketed at commercial businesses and is VERY expensive to buy legitimately.

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frosty_the_punk said

Agreed, obviously measuring cranking pressure is not a good way to estimate the power output of an engine.

I was just trying to point out that if you have two motors. the one which has LESS cylinder pressure at cranking speeds *may* actually have MORE pressure at high RPM due to inertia tuning.

To my knowledge. In race engines, this is the case more often than not.

It's exactly the same as why a "big" cam makes less horsepower at idle than a factory cam.

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