As you can see from the 4 rotor pictures Ken you don't need a plenum
as your throttles are right up by the rotor housing in each of the two runners.
The plenum is used when you want to use only one throttle body
or a mass airflow sensor as Mazda needs to do on street cars
for various reasons.

Here is a picture of the slide throttle for the 4 rotor.

I expect great things from your peripheral port engine when you get it
running. Did you cut those rotor housings yet?

Paul Lamar

Ken Powell wrote:

I have been building a motor mount jig today.  I designed the jig to work for both my miniMax and my RV-4.  Aren't I lucky, I get to build 2 separate motormounts (for 2 separate types of airplanes).  I guess my oxy / acc technique is going to get better fast!  Truth be told, I am having trouble screwing up the courage to cut those great big holes in my rotor housings.  I plan to 'match' the outside throttle housing to the 'path' of the throttle valve - this will decrease the depth of the cut somewhat.  I'll be sure to let you know when I do the dirty deed.

Ken Powell
kenpowell@aristotle.net

Finn Lassen wrote:

Just out of curiosity, has anyone run an engine with both peripheral ports and side housing ports at the same time? Any reason this wouldn't work?

And how about both side and peripheral ports for exhaust (at the same time)?

Finn

Sounds like it is worth a try to me. 
You might get more than 240 HP at 6000 RPM.

Paul Lamar
 
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