Paul,

Here are some dyno results of a 13b "P" port engine at lower rpm.

48mm "P" port rotor housing, 18" intake runner, 33"X2" exhaust

Carb. n/a

4,000 = 122.4 hp

4700 = 160hp

I have numbers all the way down to 3,000 and as high as 7,500

Skip

Hi Skip,

I would like to see numbers from 2000 rpm - 4000 rpm if possible..

1) Would anyone know how much better these numbers would be
    if the intake runner was 24"??

2) What was the best idle RPM?

The reason I ask is that I only need 120+hp and was thinking direct drive...

3) What would be the best prop for direct drive, and red-line RPM for that prop?

Regards Keith

The rotary is a small displacement high RPM engine.
Even at 3000 RPM where the prop is rather inefficient
HP is not much. The power to weight ratio would be bad.
You would be better off with a O-200.

Using a thing called a dynamic chamber to enhance the
low RPM torque you would be lucky to see 80 HP at 3000 RPM.

Best Idle RPM with a gear box is 2000. Without a gear box 600.

Here is the data for the P-Port intake runner length.
To calculate the HP = Torqe X RPM/5252.


Paul Lamar


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