MasterPower turbo's are not junk by any parameter.
They are however, less expensive than many others. (Not a bad deal if you ask me.)
Having acutually used his "T-70" turbo now, it spools up fine, hits hard, and appears to be a good deal for the money.
I'm looking at swapping out the exhaust housing in the future to a divided .81 from LIPP in stainless, and adding the SP valve.
This would make the turbo spool even faster in theory, and yet flow better on top for more upper end power than the .63, or is it .68 housing that I have now?
The final goal is 600+ on pump gas with 30% toulene added in for a total octane of about 98 for the fuel. The old turbo was quite happy at 18 to 21 psi on pump gas with some toulene added in for safety. (It was fine at 18psi on pump only.)
It was making 420rwhp at 18psi... Never could get the waste gate and controller to cooperate on the dyno to pull 21psi.. but it did it fine on the street. Figure it was high 400hp setup on the 60-1 bolt on T4.
Just boosting 11psi on the waste gate, this T-70 feels stronger than the old 18psi setup, but I have some tuning to do before any boost is added over the 11 that the waste gate will allow for now. (Plan is to run 18 to 21 psi as before, now with more fuel, it should be fine, and not hit boost cut like before where the 550's were into the 1500hz rate.)