Right....

Say I have a S2 with a T28 turbo using 16psi of boost, and I have 200 bhp with this setup. I then change to a T34 and am using the same amount of boost, can I expect to see an increase in power or still the same 200bhp ?

 

you could se an increase as the T34 flows more exahust gas and also the volume of air into the engine is much more than a t28 at the same pressure.

 

But your power will come in higher up the rev range due to more lag, just found this out from converting my small turbo esc cos to t35.