[bradboy]

I recently installed a custom turbo system on my stock H22a1 but I am convinced my car had more power at higher rpms (5000+) as normally aspirated than with the turbo. I hit full boost(8psi) @ 3000rpms and the car pulls pretty good to just about 5000. Then the power/torque stops rising, and there is a gradual climb to redline. Evenwith this lack of power the boost does not fall much. I first thought it was lack of fuel, and installed additional injectors and controller but this did not help much.

I use a turbonetics t3/t4 turbo (housing's a/r uncertain)
I it possible that the turbine housing could be restricting the exhaust flow too much?