Quote:
Originally Posted by Dragncar
I would not even consider a 325cfm port job on a street 400. It would never run great. Unless you did everything required to make a 400ci engine get the airspeed up in the port with a CSA large enough for 325-330 cfm.
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You need the maximum cross section area at the minimum cross section area to make maximum power at the minimum rpm and it will make good power at the maximum rpm.