First off i drive a 1995 M3 Now for the turbo i have laying around in my garage. This things a beast. Heres the specs:

Cold Side:

T-62mm, 54 Trim Compressor Wheel -2.430 in. (62mm), Inducer, 3.307 in. (84mm) Major

0.55 A/R Compressor Housing

3.5 in. Inlet and 3 in Outlet

Hot Side:

Big-Shaft 75 Trim TA45 Turbine Wheel- 3.240 in. (82mm) Major, 2.813 in. (71mm) Exducer

1.22 A/R Turbine Housing w/Tangential Divided Scroll, 4 in. Outlet.

Standard Large-Frame (Thumper) inlet, bolt spacing about 4.5 in. x 2.75 in.

Bearing Section

Oil Lubricated and Cooled

Garrett Model TB4501

The TB45-54 trim compressor wheel is a larger trim version of the T58/TS04 wheel (TA45 48 Trim).

Any help on whether ya think i can spool this would be appreciated.
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Based on the size of the exhaust side alone, it's going to be pretty lazy.

You would be better off selling that turbo and getting something like a Garrett GT30 which moves about 500HP worth of air and spools pretty quick.

The turbine TA45 is the non ball bearing version of the GT42R series. So it's massive and going to lag like buggery on a 3.2 litre six cylinder. Not a good match for a street car, especialy the S52US with it's low redline.

perhaps you could just buy a smaller turbine housing.

That thing is BIG for a 3L engine. A 1.22 A/R T4 turbine and an 82mm turbine wheel are just huge for an engine of this size driven on the street. Let's just say you could probably flow an easy 800-900rwhp out of something like that(don't think that compressor wheel can quite get there).

Without looking at the maps, I'm going to go out on a limb and say the compressor probably isn't a good match for an S50 given how the big T series tend to favor higher pressure ratios rather than wide differences in massflow(i.e. they were originally designed for things like big diesels running really high 25+psi of boost and low redlines). The turbine wheel looks really freakin' big for an engine of this size, and a smaller turbine housing isn't really going to fix that. A really big wheel in a small housing is still going to be lazy, and the small housing is still going to choke it up top.