I have a very similar turbo on my SE.... custom.55a/r .58trim t3 turbine w/ .60a/r .50 trim t04e compressor...
http://www.glcforum.com/ukesprit/forums/in...&MID=148&CID=70
On a track car, the 50trim cold side is just perfect, because you are practically on the cam all of the time. However, I would not want this setup on a street car due to the lack of low end (at least compared to the factory turbo). I don't drive her much on the street though, and when I do, I drive like a granny. If I were looking for a turbo for the street, I'd look at a smaller GT series Garrett. Also, be very careful with clipped turbine wheels...effieciency goes out the window quickly when you clip the hot side.
Craig
90SE