Looking in to the turbo rotary world as an N/A outsider... have a few questions.

Would it be worthwhile to go bridge ported (secondaries only) for a car that runs a fairly quiet exhaust system and a turbo sized to make good boost from about 3000 on up? I want an evil midrangey engine that is quiet enough to have fun on the street, so no N1 exhausts or straight pipes or anything like that. (Willing to sacrifice ultimate peak HP for a BROAD torque curve and moderate boost. Yes high revs are fun, but that's what my peaky-bitch N/A is for)

Possible to run 3-piece seals if the bridge is left wide enough, or would that make the new port too small to be worthwhile?

If it matters any... this is all in consideration for a Series IV, fully loaded GXL model getting converted to S4 T2 engine, preferably retaining the automatic transmission if it can handle that much more torque, just to be different. (If nobody knows, willing to be the guinea pig!)

 

nobody?

 

Bridge port is a high RPM power adder, and a low RPM power robber. If you want midrange, don't do a bridge, or even a half bridge. The exhaust setup on a bridge is very important (at least with NA engines... not to sure on turbo engines). Usually with a turbo'd engine, you want the biggest, least back pressure exhaust that you can find... so quiet is not possible.

Get a street port with a to4e 60-1 .70 on the intake side and a .70 or .81 divided exhaust housing with a P-trim wheel, there's some good midrange power for you...

any other takers on this?

 

A Bridge port will make more TORQUE and HP than a "street port" will make at all rpm above 4500 or 5000rpm