I was wanting to know how everyone was jetting there nitrous kits on a boosted app. How exatly do you determine the fuel jet. My truck has 58psi FP @ 0vac. Now when it goes up into boost my FP jumps to 72psi when the 2nd pump kicks on and thats on 12#. Question restated is what FP do I base my fuel jet off of, 58 or 72?

 

You would base your calculations on the referenced WOT fuel pressure as that is the pressure the jet will be seeing.

 

I used the jets for 60psi.. it richened up at higher boost, which is sorta good it went from 11.2 to 11.0 on the kit..
You cant do a COS5 can ya? That would be your ticket..

You planning on spraying it out of the hole or out of the hole to the traps?