You need to shorten the intake runners to 18" to 20" engines for more
power with a 2.85:1 PSRU. Take off RPM will be 6500 to 7500 engine
RPM.

Also you will need my cooling book.

Shield the lower left motor mount bushing with ss from the 1500 F
exhaust pipe.

Paul Lamar

Jake, thanks for the pics. It is sad to see such potential in a
project go unfinished. Let's hope you get a good deal on the FWF
package, and get another rotary in the air.

Steve Carlisle

Thanks for the info, what is your cooling book? How would you shorten
the intake runners with the air intake on the right side like it is?
How much power difference would there be? I was planning on wrapping
the exhaust pipes and will plan on a sheild for the motor mount.

Jake

The plenum is unnecessarily large. Move it to the top of the engine
something like this. You will save weight too :)

This is a P port but an optimized side port will work too only about
50 HP less.

With the intake runners as long as they are now you will be about 165
to 180 HP. You should get 200 HP with an optimized side port engine,
2.85:1 PSRU and 18" runners at 6500 to 7500 take off RPM. With a
P-port you would get 250 HP.

There are now better mufflers than that shown in these pictures and
3D's.

http://www.rotaryeng.net/cooling.html

I also sell the book direct for cash $30 + $5 shipping in the US.
More shipping over seas.

Paul Lamar


An admirable project !
BUT why do people constantly negate their efforts by choosing THE worst location
for the cooler and its air intake ?

Lutz Strobel

What location do you have in mind?

Paul Lamar


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