Quote:
Originally Posted by M.H. Yount
Can you share more about assumptions for the runner length calculations  did it solve for peak torque rpm or did you input that number? Seems higher than I would imagine....of course I'm making up all of it....

It first has a formula to calculate peak RPM. I used the runner area where it enters the head as that seems to be a fairly consistent cross section. It probably is higher than actual value, but I figured if I use their calculator for each step the end result should be close. I know that other E30 ITB kits use around a 12" length valve to runner end
http://www.wallaceracing.com/runnertorquecalc.php