Stock Fuel Pressure 99-04 GT

Stark77

Member

Jun 11, 2008

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Tallahassee, FL

Jun 21, 2008

#1

• Jun 21, 2008

• #1

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

I fantasize about it being BIG!

Founding Member

Apr 23, 2002

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Jun 22, 2008

#2

• Jun 22, 2008

• #2

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

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Jun 11, 2008

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Tallahassee, FL

Jun 22, 2008

#3

• Jun 22, 2008

• #3

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 fantasize about it being BIG!

Founding Member

Apr 23, 2002

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Jun 22, 2008

#4

• Jun 22, 2008

• #4

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

Member

Sep 6, 2005

404

1

16

Westland, MI

Jun 22, 2008

#5

• Jun 22, 2008

• #5

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

 

Stark77

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Jun 11, 2008

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Tallahassee, FL

Jun 22, 2008

#6

• Jun 22, 2008

• #6

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

 

Y

YelloSchtang001

New Member

Apr 26, 2005

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Jun 22, 2008

#7

• Jun 22, 2008

• #7

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

 

blkhorse

Founding Member

Oct 30, 1999

345

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18

Jun 22, 2008

#8

• Jun 22, 2008

• #8

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

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Jun 11, 2008

501

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Tallahassee, FL

Jun 22, 2008

#9

• Jun 22, 2008

• #9

awesome - thanks so much for the help guys