How much is too much

[forever4]

Originally Posted by Dick Steinkamp

I supplied links to quality cam grinders who claim they can regrind a stock cam to the same stock profile...and that they can even grind a higher lift and longer duration than stock on a stock cam. I also provided illustrations of how this is done by reducing the base circle.

This conversation has been on fordbarn and ahooga 25 times over the years, and the facts are still unchanged.

Your illustrations from Marco / Bob Johnson are correct. Your understanding of them is not.

"OR", versus "AND" and the limits of the physics are key points. This is real life, not a theoretical abstraction.

Also what really matters is the integration of the area under the curve representing valve height and duration off seat, which is the real life breathing and the charge.

Based on the many discussions preceding on the boards, I don't expect to convince you of anything. That is your job. Or not.

As a practical matter, why do you suppose that new repro stock cams outperform all the 'stock/touring' regrinds available for the last 50 years, and that everyone wants to use and recommend a Stipe 330 or clone, when a regrind is a third the cost?