hey whats up , i just wanted to know how reliable is nitrous on a 2.5rs motor.

 

It depends. If you (or the shop you have design it for you) are knowledgable, you can make a 50 shot work fine. But even a 25 shot can blow your motor if it isn't properly tuned. At a minimum, you need a wet kit, fuel pressure riser, and AFC. Better still would be real engine management. The short answer is, if you just buy a kit, bolt it on and go, you'll probably break a piston or rod, or blow your head gasket.

 

i have the safc which still has to be installed other then that, the fuel pressure riser, how much is that, and what does that do

 

The fuel pressure riser... raises fuel pressure.

Other than that, make sure you get a 'wet' kit. This means it adds extra fuel with the nitrous to prevent it from running lean. Better still, find a good shop with a lot of experience to tune it for you if you aren't comfortable with it.