I want SExxx
10+ year member
BOOOM
For the programs that calculate the port length you enter in all usable airspace in the box (take away sub disp.) It calculates the length for the starting airspce....you can't calculate port disp if you don't know the length yet...the only thing it doesn't account for is the disp. of the wood/plastic/ect used to make the port....but unless the length is very long it won't affect the final tuning much....not an exact science. Whether it ends up 28,29,30,31, or 32 your not gunna hear much difference at all.
