I was planning in making 2" primaries that lead up to the turbo flange. With a 3" downpipe. Is that freeflowing enough or do I have to make it bigger? The motor is streetported.

 

It should be enough, but without measuring pressure levels, you can just guess. Or you can drive around with open dump and then do buttdyno guess how much you lost with mufflers etc

 

Lol I love how rotaries go against everything you ever learned about reciprocating piston engines. Even tho I think there's no replacement for displacement. And that beautiful v8 rumble is irreplaceable. The only v8 I hate is the chevys. Sure it's cheap but they suck *** lol. Sounds very sloppy and power per cubic inch is terrible in comparison to ford or Chrysler.