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Discussion Starter · #1 ·
I have a 1990 5.0 that I'm going to be adding more power to in the near future. The question I have is I want to get about 425-450 hp out of it and right now in somewhat stock form the fuel pump seems to be giving in to age. Can I replace it with a larger lph pump until I get my engine hp in the range I'm looking at or do I have to replace it with a stock unit? I just don't want to do this twice.
 

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You can upgrade.Same installation process as the stock unit.There are many pumps out there.Perhaps a 255 lph would fit your needs.
 

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G ahead and get a 255 lph. No worries after that.
 

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"I have a 1990 5.0 that I'm going to be adding more power to in the near future. The question I have is I want to get about 425-450 hp out of it and right now in somewhat stock form the fuel pump seems to be giving in to age. Can I replace it with a larger lph pump until I get my engine hp in the range I'm looking at or do I have to replace it with a stock unit? I just don't want to do this twice."

In the responses to the question, the recommendations given are to go with a 255lph in tank fuel pump for the stock 5.0 Mustang that eventually will be modified to produce 425+ Horsepower. Should the 255lph Fuel Pump be a "High Pressure" in tank pump or a "Low Pressure" in tank pump?
 

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im confused

i thought a 255 was hi pressure, we domestic's just call them lph instead of cc's per minute, but correct me if i'm wrong, i know the stock pump pushes like 40 psi 2.3l and 5.0, but the 5.0 has a higher lph.
 

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make me think..

has anyone experienced a failing f/p? i'm having cruising issues,and i cant see a pressure drop at idle, and cant test rolling cause my guage is'nt long enough.
 
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