Here's why port volume doesn't matter that much. Well, first, I think it does matter as you get closer to the valve. If you have a big valve and a small port (bowl) that's no good. And too big a bowl is no good, either. So we can say bowl volume, and shape, it pretty significant
In any case, the volume of a port is measurement that stops at the intake face (on the intake side) and the exhaust face on the other side. From engine to engine, that configuration can change greatly. If you think my engine is a dog because the port volume is too small, I'll mill 1/2" off the intake manifold and add 1/2" to the port and you'll love it then, right?
