[jim_howard_pdx]

ABSOLUTELY RIGHT.

You get a prize my friend. If I were answering my post I would say Jim ol boy, we are not recommending pop up pistons any longer. We build an efficient wedge combustion chamber that swirls good, we get the spark plug as near the center of the cylinder as humanly possible and we run flat tops to get the best flame propogation.

This is all current motor building theory 102. Old racers like me used pop ups because we were convinced that reducing the area between the piston top and the combustion chamber would make for a better more powerful burn and it does.

Racers went to flat tops because they did not want to take the time and effort to smooth the pop up top so the flame could travel without bumping, dodging, or skipping. This is why my race engines won trophies. Because I did not buy into engine building 102, I improved the burn cycle of 101.

Now for a zero deck height, that is fine with a copper gasket with .049 compressed thickness with forged steel rods and aluminum pistons you are good to go.

Play with a piston or two as I described and see if you want to try it. It is easy enough to switch pistons during a season to test what delivers the best ET's.

I promise you mine will do better in a NOS classification.

But you try it and tell me what you find out.....