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?
I got 1.71 using those numbers.
Only your big runners are 1.75" from the looks of this pictures.
Your small runners look to be considerable less area.

Paul Lamar

Paul, I think for Al's 3 rotor you would need to use something like 360
cubic inches and 9? cylinders.

Ed Andeson

Not true. Statements like this indicate a lack of fundamental
understanding of how the rotary really works. This is also
why you are confused on the intake manifold.

A three rotor is a three cylinder 2 cycle
or a six cylinder four cycle. Forget the three faces on the rotors.  
The ONLY thing that counts is the intake, firing and exhaust events 
per revolution of the e-shaft. Think of it as a mysterious black 
box with air pulses going in and exhaust gas pulses and HP pulses
coming out.

What is confusing is the fact of the timing of the pulses in the
individual pipes. A three rotor has only three exhaust pipes but
the volume of exhaust gas coming out is the same as the six pipes
of a six cylinder four cycle engine. The number of side port intake
pipes is exactly the same however and so too the total volume of air 
going in. It just goes in the pipes at different times. 
You need to get some of the early books on the Wankel
such as Yamamoto's Rotary Engine and the Norbye or Ansdale books.

Paul Lamar
 
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