What have you seen for velocity change with a perfectly matched port? I'm assuming zero? And what would you expect the power difference to be between these two scenarios?
If the intake is bigger than the port, there is some reduction in air speed right at the mismatch, but it was minimal. When the intake is smaller, you can see 280-300 FPS at .500 in the port. At the flange I have seen zero.
I didn't spend nearly enough time sorting stuff out for velocity and I wish I had. Thinking of buying another bench so I don't have to drive 3 hours to test anything. If I do, I will certainly spend more time with air speed measurement, because IMHO, controlling air speed and direction is 90% of the battle.