Interesting.
When I had this turbo in my GN (which has all the go-fast goodies), Job Spetter and I tuned the car at 28psi (per his instruction) and it seemed to love it. When I went with a Q trim 70 in the GN, I slapped the Stage 4 in the T-Type which had a TA49 in it at the time. What a difference. Got even better when I dumped the stock D5 and installed a 9" n/l converter. The 9" really woke the turbo up, especially since it has a .82a/r turbine housing.