Stock Fuel Pressure 99-04 GT

[Stark77]

Couldn't find the answer to this question via search. I know injector size - 19lbs - but does that mean the total overall fuel pressure is 19lbs? I think my nitrous kit came out of the box - set for 30lbs. If it is 19lbs, I've got some adjustments to do lol. Any help, as always, will be greatly appreciated.

 

[DBMSTNG]

fuel pressure is determined by the fuel pump, not the injectors. the 19lbs/hr is just the flow rate of the injectors. i'm not sure, but i think the stock fuel pressure is 30-60psi at the rail depending on load and throttle position.

 

[Stark77]

K, thanks - reason I asked is because I picked up a load of jets for my NOS kit, so I can get it dialed in exactly how it should be for my fuel pressure. Unfortunately, the kit doesn't explain whether I should base this on idle fuel pressure, or WOT fuel pressure. Do you have experience with this?

 

[DBMSTNG]

i don't have experience with nitrous, but you'll want to dial it in at WOT as you don't want to run nitrous at anything other than WOT above a certain rpm.

 

[2000fordstanggt]

hence the reason for the wot switch, either mechanical or digital

 

[Stark77]

exactly - anyone know what WOT fuel pressure would be on stock fuel system for 4.6 2v?

 

[YelloSchtang001]

i get 45 at idle read through the data logger in the diablosport

 

[blkhorse]

Ford Runs with a 39 psi delta pressure(pressure drop across inj). so at wot,0 manifold press., should be around 39 to 40 psi. at 20" vacuum it should be around 30(every 2" of vac = 1psi, so 40-10=30) and at 10 psi boost should be around 50(40 +10 = 50)with properly sized injectors

 

[Stark77]

awesome - thanks so much for the help guys