Trick flow

moper said

Totally missed the mark on this one RRR. Volume is huge when designing the engine and top end specifically. All engines have personalities, and the port volume has a lot to do with it. Power curves, peaks, shift recovery, pretty much everything is affected by the head’s port volume to one degree or another. It’s only marketing if you don’t understand what it represents.

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That's the way I understand it but I'm just a self-taught head porter. To make the perfect port would require filling the void (slow) area's and adding metal on the outside of the port so you have material to remove in the fast area's. Every-time I flow a head I check air speed throughout the port. Still testing and still learning. I used to keep a piece of paper and a pen on my nightstand at night and would sometimes wake-up and make a sketch of something that popped into my head so I didn't forget it. Now when I get a port the way I like it I take a "port mold' so I can take it in the house with me and look at the whole port in 3D.