What is the purpose of the small rectangular ports (.385"X.775" and .540"X

1.155") that are >just below the main oval intake ports of the engine
housing.  Is it really

required to feed turbo pressure to these smaller ports also or can they be

blocked off?  They >don't appear to feed the combustion chambers or am I
wrong?

Regards,  Chris Gentry

                Glasair (Turbo Rotary)
                 Dragonfly (Turbo Subaru)
                  Grumman Cheetah

I think that is the Exhaust Gas Recirculation  passage on the turbo engine.
You won't need that so block it off.
Paul Lamar

Al Gietzen wrote:

That is correct.  You will also note the small ports below the exhaust
outlets; part of that system.  Block those as well.  Easily done in both
cases by covering them with the manifold flanges.

Al

 
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