ok, so i have a t28 ball bearing off of a r33 skyline. going on my mazda, i know, not a nissan. but i just wonder this, whats the efficiency range of this turbo? the motor in the mx6 is good for over 25 psi with correct fueling, and seeing as the cars getting megasquirt, i dont see this to be a problem. BUT im sure the stock wastegate will be overpowered at that level, and the compressor i would assume would not like it much either. SO what do you guys think would be liveable. 18 psi or so, or 20 maybe? and these mazda 12 valve turbo motors arnt like our sr20s, i really do need to push that kinda boost to make big power.