[Steve C.]

"To calculate the true CD at the above listed flanges, one would need to know what the corner radius are"

Good point and one often overlooked. I'm guilty of just doing height x width when figureing a port area.

Similar situation as forgetting the ring area when calculating a compression ratio.
Often overlooked. That tiny, hidden space between the top piston ring, the cylinder wall, and the top of the piston.

Thanks Stan.


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[Stan Weiss]

Originally Posted by Steve C.

"To calculate the true CD at the above listed flanges, one would need to know what the corner radius are"

Good point and one often overlooked. I'm guilty of just doing height x width when figureing a port area.

Similar situation as forgetting the ring area when calculating a compression ratio.
Often overlooked. That tiny, hidden space between the top piston ring, the cylinder wall, and the top of the piston.

Thanks Stan.


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Steve,
You are welcome.

A good example would be a round port. Let use 2".

2 * 2 = 4 sq in

(2 / 2)^2 * pi = 3.14159 sq in or only about 78.5% of the raw calculation

Stan