I have the same turbo as you 97_gq_lwb and the only way i could see to adjust the gate as on the external thread. Is there a spring or something inside? I am not too familiar with turbos hence doing this for experience. I have worked with pressure relief valves before but they don't work like the wastegates.
I will wind the fuel up a little more and see what it does.
Is it nessesary to adjust the injector timing when running boost or only for more extreme applications?
I have been told the rig blows a teeny tiny amount of black smoke but i need to see it for myself.