how many fuel pumps

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Mar 30, 2009 | 06:50 PM

colorsink

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how many fuel pumps

90 f150 4.9 one gas tank in back does this just have the intank pump or is there another pump on the frame rail

Mar 30, 2009 | 06:53 PM

subford

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From: Easton,Ks

Just the pump in the tank.

Mar 30, 2009 | 07:26 PM

1966Tbird

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i have an 89 5.0 aod with a pump in the tank and one on the frame for what it's worth

Mar 30, 2009 | 08:02 PM

subford

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From: Easton,Ks

Quote:

Originally Posted by 1966Tbird

i have an 89 5.0 aod with a pump in the tank and one on the frame for what it's worth

If you have an 89 you sure do.

Mar 30, 2009 | 08:37 PM

1966Tbird

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didn't know that 90 was when they made the switch to just single intank pumps

Mar 30, 2009 | 08:40 PM

superduty79

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From: stratton vermont

myself once a pump goes i go aftermaket.....

Mar 30, 2009 | 09:17 PM

1966Tbird

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i doubt you can make enough power with a 300 to use more fuel that the stock pumps can provide, with a 5.8 5.0 or 460 then yeah it's not too hard to do

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Mar 31, 2009 | 08:14 AM

subford

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From: Easton,Ks

Quote:

Originally Posted by 1966Tbird

didn't know that 90 was when they made the switch to just single in-tank pumps

In 1990 Ford F-series gas trucks went to just the in-tank pumps, the E-series did it in 1991.

Quote:

Originally Posted by 1966Tbird

i doubt you can make enough power with a 300 to use more fuel that the stock pumps can provide, with a 5.8 5.0 or 460 then yeah it's not too hard to do

The in-tank 1990+ pumps put out about 100 PSI against a blocked head.
They are rated at 125 LPH (33 GPH) @ 310 KPA (45 PSI) so the stock pumps can put out more than enough fuel for the 460.

A 460, 351 & 302 have a top fuel pressure of 45 PSI (310 KPA) and a 300 engine 60 PSI (415 KPA) so there is no problem. If you want more than you would have to go with an adjustable fuel pressure regulator.

The Injectors Flow #/HR are for the 300 = 14#/HR, 302 & 351 = 19#HR and the 460 at 24#HR.

So the injectors @42 PSI for the 14#HR = 2.45 GPH, 19#HR = 3.3 GPH & 24#HR = 4.2 GPH.

So a 460 at WOT = 33.6 GPH @ 42 PSI and that would be enough fuel with a 33 GPH @ 45 PSI as the pump would put out more GPH at 42 PSI.

Any engine under the 460 would have more than enough fuel.

Sorry I do not have information on the 1989 an older fuel pumps ratings but would think Ford would have put large enough pumps on them also.