Quote:
Originally Posted by automotivebreath
Does anybody have knowledge or experience with this style piston? It has a
concave dish leaving a small squish band around the circumference. I have
heard they are sometimes used in cup engines. What is the theory behind them?
What does the cylinder head combustion chamber used with these look like?
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On the other hand, Judson hoped to eek out a few extra ponies by running concave dish pistons instead of the more common reverse domes. "A concave dish sacrifices some quench compared to a reverse dome, but the Nextel Cup guys have been using them for years and say they're good for an extra 3-4 hp."
A quote made by Judson Massingill that is in the paper version of the mag. Article bit does not appear on line is.
“Some people swear that a concave dish piston is worth some power over a reverse dome, but when five guys that finished ahead of you have reverse domes, it makes you think twice.”
Small Block Ford - Popular Hot Rodding Magazine