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Dynoed the Wife's all-motor GT:
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[QUOTE]Originally posted by AaronC: [QB] [QUOTE]Originally posted by 2stangs69-91: [qb] maybe somebody forgot to tell the 347 it was carbed instead of EFI? Or the air flow of the heads, intake,longer stroke and compresion ratio dictates the cam grind more than just the air flow of the intake. [/qb][/QUOTE]EFI manifolds are much more restrictive and the runner lengths are different. Hence the reason of a different size stick. You'll never see EFI crack 400 with a 224 duration intake lobe. Typcally it'd take at least a 240 duration intake lobe to crack 400 with EFI. Which was my point because there are several 347's with the same parts but EFI (AFR's, 11:1 compression, with same stroke etc). So the overall flow is the same on the bulk of the parts except the type of manifold, which is why it only needed that small of a camshaft to bust 400. [/QB][/QUOTE]
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