RE: I need help with my tc3 with a turbo nova rosi .12 motor
There should be no issue w/r/t the turbo head.
How rich are you running? Sometimes you aren't getting enough fuel if it's too lean. If it's too rich, it will gurgle at full throttle as well.
What are your engine temps? How much is it "bogging down"? Does it just hesitate, or does it actually slow the car down?
Have you checked for airleaks? Could be sucking some bubbles. Could be getting air around the carb if the o-rings are shot.
The point here is that it's real hard to pinpoint without actually hearing/seeing it run. Could be a number of things. Start with tuning, and go from there...