WTF!
How many have you seen?
I plan to hit 300+rwkw, using a GT30R, with a 0.82 rear housing.
Hell i have already made 270rwkw, on run in tune, with the vacuum/boost line for the actuator running straight off the comp cover; no restrictors, solenoids or ebc's. Once run in is complete we'll be adding and extra 5psi (20psi max), more timing, better tune, adjustment of cam gears, boost controller, and an extra 1000rpm.
Here in my run-in dyno graph:
This turbo would come in hard by about 3500rpm, on a well set-up engine, and keep pulling hard up to redline. I would be very surprised if it didn't make 350+rwkw.