between 7-8psi.
35 psi with stock turbo or 49 psi with stock head gasket.
14 PSI
It varies between cars. For the gs-t it'll be around 9-12 psi.
The stock boost of a 1987 Toyota Supra Turbo is 6.8 psi/0.46884349504 bar.
I think around 14-16 psi
7 psi is safe to boost on a stock d-series motor
145 hp and 195 ft-lb torque from factory at 7 psi boost.
You can put a turbo on your nissan but have the psi turn down to 5 psi if everything is stock, you should be fine. Then you'll have more pick up but the problem is you'll have to make room for your turbo by removing your fans in front or find a place to mount your turbo.
I believe it is in the ball park of 14 to 15 psi of boost. That is what my turbo talon run. Edit: A stock 1g DSM (Talon eclipse laser) has it set at 9-12 PSI. while the stock gauge says 14 sometimes it should not be trusted. get a aftermarket boost gauge and find out yourself
it is usually running about 8 or 9 pounds stock but if you get a boost control the most you can push is 15 pounds
You need more information to find out how much horse power there would be. There would be a variety of horse power concerning what engine the turbo was on.
A Z31 turbo with the boost on about 11-12 psi and intercooled will make around 250-275whp, which is about 75-100 more whp then a z32 na makes at the wheels. Z32 NA makes 220hp stock while a Z31 Turbo makes 200hp stock.