http://www.newcovenant.com/speedcrafter/calculators/intake.htm

Here is an interesting Spreadsheet for calculating Torque peak.

Lynn E. Hanover.

Thats pretty amazing Lynn. Thanks for finding that.

Paul Lamar

It is pretty amazing, because it computes that for my engine my port
(1.75" dia) is optimum for peak torque at 5770 rpm.

Al

<Did you use 212 cubic inches and six cylinders Al?

No, I used 240 and 6 cylinders.  When comparing to a four stroke, the
2-rotor is 160 and the 3-rotor is 240 (approximately); no?

<Only your big runners are 1.75" from the looks of this pictures.
<Your small runners look to be considerable less area.

Those runners are two in parallel to each cylinder (rotor).   I'm sure
the little program assumes one runner/cylinder.  Effectively, my runner
is the Throttle Body.

<Paul Lamar

Yes but a three rotor is equivalent to a six cylinder four cycle engine.
That engine has six intake runners and not three. Your engine has effectively
six runners. They just happened to be joined into three.
The equation on the web site  was derived on the six cylinder four cycle basis.

Paul Lamar
 
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