My buddy has a 1978 Datsun 280z. He has a RBs5DET swap, the car should be ready Monday. It has some bolt ons, intake, 3" downpipe, 3" cutout mated to 3" exhaust with a N1 muffler. It has a stock 1JZ supra FMIC....and an MBC...I think stock boost is 7psi? I was wondering how safe it is to go to 12 or so? I know you can turn it up a decent amount, but how much. The car weighs about 2700 lbs.... I am sure it will be quick but I dont think it will be a speed machine, and he may have a hard time beating my POS neon. What do you think it should do? Low 13@104-106?