ok please specify. Are you talking about a TT setup like the stock TT on a 3rd gen...or are you talking about a TT setup like igy, where they are both bigger turbos. You wouldnt want to run a smaller and larger turbo for a setup like igy's for reasons that would already be mentioned. If you are talking about a TT setup like stock...well i think you might be out of luck there. Nobody really makes a larger stock type setup. your best bet there would be a set of BNR's or M2's, which are a upgraded stock turbos. running in parallel you should be able to hit 380rwhp pretty easily (correct me if im wrong) it just depends on your porting and tuning setup...

 

I'll try to make this quick....



Singles are easy to do. Simplification + Big HP = happy rotary owners.



Twins are not as easy. You COULD do a large twin setup. They are out there. HOWEVER... getting the 1.3L of a rotary to make use of a large twin setup is a little more difficult. I know of a twin TO4S setup in the making. I'm curious to see when full boost is achieved, and when the max power is made..



I'm running a larger bore twin setup. I hope to make 400 HP +... I'm sure I can, but will be nowhere the reliability level of a nice single.



A nice single will flow the same amount at less psi with LOTS less heat and stress to the manifold pluming...



Jeez that was a lot of typing...

 

Where they are both bigger on an FD.

 

Thanks!