A T3 running at 2 bar?
The compressor maps for a T3 55 trim stops at a pressure ratio of 2.8 (26 psi)
The T3 55 trim turbo at that boost is outside any efficiency map. It is just making hot air. Upper useful limit is 21 psi.
I would hate to measure the exhaust back pressure with a .48 turbine running 30 psi boost. Minimum 60 psi backpressure.