Intake Runner Length

[Greg Hermann]

>   The D port is from what "chev" has done with the exhaust port,
>probably some else did it first, it's just they are so common......
>Bruce

IIRC, the exhaust ports on the Ford 427 FE "cammer" were the first to be D
shaped---with the flat on the short side of the curve. In other words,
round, except for where the flow would separate anywayz. Believe it was
claimed to help keep velocity up, and more importantly, turbulence down.

Regards, Greg

>> Thanks for all the inputs.....Tim.
>>