Hi all, just wondering, what boost do standard saph 4x4's run? I think mine is pretty standard holding 9psi, what boost pressures do they run at different stages? Can they run stage 3 dark greens etc on a standard turbo? And lastly, my last cos, a 2wd was running a T34 and stage 3, the sound of the car was completly different to my current car it sounded awesome, loud and harsh, this one has a similar exh' system yet sounds quiet, pretty similar to any other sierra ive herd, all be it with a little wastegate chatter, is this due to the turbos?
Old car was a 89 2wd 350bhp stage 3, current is 90 4x4 standard.

Sorry for the daft questions