silverpain

looking for some solid info on primary port sizing , the secondaries are already huge so i've just poished them but the primaries are tiny! both in duration and flow volume.. I've matched a mazdatrix 6port streetport template to it and they are about the same duration ( start and finish of opening) but the depth of the port is @ 65% of the NA streetport size.

Any info on changinging the size for volume and duration would be gretly welcome, I am using a T70 P trim with a .83 turbine..

thanks.