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microsuck
03-15-2003, 12:32 PM
anyone know the FLOWING fuel pressure for a L with stock pumps. I am trying to tune my nitrous, and I need the flowing pressure. I am pretty sure this isnt what my fuel pressure gauge shows, is it? NOS website says a normal car is arround 5-7 psi. my gauge shows upwards of 45psi under full boost with the nitrous off. anyone know?
Andrew

f150freak
03-15-2003, 01:35 PM
Can't say whats normal for a Lightning but 5-7PSI is a carburated pressure. Almost all fuel injected Fords I have seen have been in the low 40s

L8 APEX
03-15-2003, 09:52 PM
He is close with his desc. 5-7 is carburated pressure and L's have two pressures cruise is around 35psi and full throttle is around 45. The computer regulates the voltage to the pumps per demand.

microsuck
03-15-2003, 10:26 PM
so I should jet for 45 psi?
Andrew

L8 APEX
03-16-2003, 12:16 PM
Most kits have an application chart to jet from? NX does what are you using? I like to start off fat about two #'s larger recomended and then finish it up on a dyno w/ AF readings.:tu: