I have noticed that port theory dictates that as a port gets bigger in diam it's length must also get longer. And as it gets smaller, it gets shorter. No puns please !
Question: why does one need to use a port that is 4" in diameter when a 2" would work and be a lot shorter and hence easier to work with.
I know that the small port won't move as much air, but there has to be more to it ?