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Old 08-12-2017, 03:00 PM   #103
Atom D&D
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Quote:
Originally Posted by M.H. Yount View Post
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
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