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A hemi port does not have to be huge to flow like crazy, look at the new version hemi for proof, ports are no bigger than a SB head but can easily flow way over 300cfm like a heavily ported W2.
Huh? A factory Hemi port is 1.84" x 2.00", thats 3.68 in^2. My fullly ported w9's are only 1.4" x 2.2" that's 3.08 in^2. My heads are 20% less port size then the hemi, and they flow about the same if not better...
(stock hemi port we're talking of course...)
The hemi head probably has the biggest port ever produced aside from the ford tunnel port stuff or a Ram Air 5...
Funny I said "new hemi and W2" and you come up with "old hemi and W9" I don't know if a max ported W2 can flow 400 CFM but a ported 6.1 hemi head will and there not too far different in size, as best info as I can find on port size the W2 port is bigger. A more apropriate comparo would be the Max effort 6.1 Vs a max effort W8 assumeing you can get an aproprite displacement and or valve train for high RPM the hemi will make more power.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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