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Old 01-13-2014, 02:35 PM   #9
Purdy Swoft
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Join Date: May 2010
Location: Alabama
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Default Re: A vs B Intake Manifold

Quote:
Originally Posted by Fred A View Post
It is hard to imagine why the Ford engineers changed the shape of the intake. The offset angle and the vacuum tap relocation were needed, but the flat top is a wonder to me. Could the B intake flow better than a bored A? Interested: Fred A
Fred, free tip here!!! The inside of the B intake is larger, not just the runner from the flange but all the way to the intake ports on the block. The flat top on the B intake better breaks up and distributes the mix to all cylinders rather than mostly to the front two cylinders. The flat top B manifold is one of the reasons that the B engines run smoother, Better fuel distribution to all of the cylinders.
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