Paul, you are picking on me.  I meant 3 ports per rotor for a total of 6
ports.
We tried larger diameter runners, it made very little difference. The
breathing is limited by the surface area of the intake ducts within the
side-housings, at least that's what I think.
Francois

Francois,
I don't know if this helps, but I agree with you on the side ports, I also
think they are restrictive and not just for the reason of surface area,
That's why I like the P-Port 'direct inlet' - better breathing.

I'm not trying to convince you of anything - just a suggestion!
George (down under)

I agree with George on this Francois. You are building your own rotor housings
and end housings why mess with side ports? Aluminum end housings are much
easier to make if you don't have ports in them. Here is an Everett Hatch engine
with aluminum end housings and P-ports. Super simple. 200 HP is absolutely no problem
at all and the intake manifold is simpler and cheaper.

Paul Lamar
 
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