Quote:
Originally Posted by Stan Weiss
Does anyone know what the Pontiac "D" port intake port center line length is? The number I have is 5.0" which would be shorter than a SBC or BBC. For reference the number I have for a CV-1 intake port is 5.5".
Stan
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5” sounds close to correct on a standard d port. A SBC is about 5.3”, but also the intake manifold angle is different (10*) and makes it even more misleading. I think a BBC is about 6”. The modern LS has an even more shallow intake maniflold face angle and cathedral ports throw the port length comparison way off. It is not like comparing Apples and Oranges. It is closer to comparing Apples and Carrots. LOL