it's a b16 with an aem cold air and the original fuel pressure was 33 psi. it is now set at 35 psi but a friend recommended 37 psi. what do you guys think is good for now??? also, will i notice a difference from one to the other???

 

What modifications do you have?

Higher fuel pressure in general increases fuel atomization, which results in better performance (when looking at just that issue.) However, if you are running rich and you make it even richer you are just going to lose power.

The stock ECU runs rich in several areas as it is (safety), I actually gained HP by turning down my FP by 2psi.

 

33 stock?? that seems low, mine was at 43psi stock on my gsr...is it that big of a diff between b16 and b18c?

 

after i installed the fuel gauge, it read 33 psi with only an aem intake. i think i may take it up to 37 and see how it runs. any other opinions???

 

take it to the dyno