it's not the turbo that determines the psi. It's the wastegate spring. psi is not what makes power anyway! the size of the turbo is what makes the power ex. the sizes of the inlet and outlet on the wheels. so to answer your question in full, you would need a waste gate that has a spring that will hold your desired psi. a t3 turbo with a .48a/r is supposedly good for 400 hp. but then again it also depends on what your supporting modifications are going to be. www.treadstoneperformance.com has everything you will need! and the Garrett website has alot of good turbo information and everything youll need to know!
a BoV is always a bad idea with stock ECU/tuning, you will in fact lose alot of horsepower just throwing a BoV on your GST... FInd a good BPV for your car and recirculate it back into the intake. Also, your front mount/BoV has nothing to do with how much boost you run, in running more boost you need to get better forged rods,piston heads, etc. Also your stock T25 turbo can only push up to about 15psi safely but you shouldn't surpass the stock setting of 12 psi. YOU WANT TO INCREASE BOOST? Bigger turbo, better rods, fmic (front mount), external wastegate, a good piggyback (DSMLINK), or a true Standalone engine management system with extensive TUNING. ---All necessities.
carb: 4 to 6 psi tbi: 9 to 13 psi mpfi turbo: 26 to 32 psi mpfi non turbo: 41 to 47 psi
Non-turbo: 14.5 psi Turbo: 55 psi
35 psi with stock turbo or 49 psi with stock head gasket.
you have to get the turbo, manifold, down pipe, boost controller, turbo oil lines and probably a pump. you also need a different cylinder head, or a thicker head gasket. any means of dropping the compression ratio or else your going to blow the head gasket. also need a BOV (blow off valve) and a waste gate. weather it be a internal or external, its up to you. that should cover all bases. you can run a non turbo engine at 6(safe) to 8 (max) PSI and you should be fine, but any higher you need to drop the compression ratio. the L series engines are high compression engines, running 150+ compression, and your putting more pressurized air into it.
between 7-8psi.
12 psi in both ranges
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.
psi stands for pounds per square inch. A turbo builds up pressure (measured in PSI) in an engine's intake manifold which means that more air and and fuel are taken into the cylinders at each stroke thus producing an increase in power.
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.
output is 2 to 7 psi.