nissan2787 wrote:ok guys i have a nice and quick question. i ust got and sr clip now here is the question what setup is better t25 or t3 t4 top mount.
Depends what are you looking for? If you are looking for a cheap route keep the t25, or upgrade to at t28, and keep the stock manifold. If you want more power then upgrade to the t3/t4 and get a new manifold, turbo elbow and dp, ecu flash/ stand alone ecu, injectors, frontmount yadda yadda yadda.
nissan2787 wrote: also if t25 what is good psi to run and what power to expect and if t3 t4 what is good psi and power to expect with all stock injectors and maf for now. and the only upgrade is walboro 255lph fuel pump
t25 maxes out at 15 psi, well you can go higher but theres no point, so anywhere below that should be fine. I suggest if upgrading to a t3/t4 to ugrade everthing else as well since you are there, like injectors, ecu flash/standalone etc, to make more reliable power.
If i were you I would start with the engine stock or mostly stock get used to that then upgrade the turbo and everything else.