David Vizard - Which to prioritize - PORT FLOW or PORT VELOCITY?

RustyRatRod said
If you have reversion then you have the wrong camshaft.

71GSSDemon said
I can hope he is meaning the sound/flow wave naturally created when the valve closes and the intake charge reverses??? Time that reversion with the next intake and you can overfill the cylinder. So choosing intake runner length, port velocity/size and cam shaft profile.

Yes. And Calvin Elston points out his (frustration) that the exhaust ports are often ignored, but the same could and should be done there. While he can't control that, he chooses the exhaust tubing diameters and lengths to keep the flow moving away from the port even as the ex. valve is shutting. Larry Meaux's Pipemax gets us pretty close especially with 4 into 1 headers.