I sorta did that - well, actually Tim's Turbos in Virginia did it for me on my OM617 turbo. My turbine side is OEM with a T03 (I think) compressor side with clipped wheels. I can get up to near 20 PSI with an acceptable pressure ratio. As you may be aware, you don't want the exhaust manifold pressure to be more than 1.5 times the intake manifold pressure. If the pressure ratio gets "up there" you'll have to upsize the turbine side.

Dan