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Thread: Fuel pump for HO with 30lb injectors?

  1. #1

    Default Fuel pump for HO with 30lb injectors?

    I'm guessing my stock Lopo fuel pump will not carry the mail with a mild HO with 30lb injectors.

    What fuel pumps have you guys gone with and what works best for going to an HO engine?

  2. #2
    The Brown Blob 87gtVIC's Avatar
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    I have been running a Walbro 190 lph Fuel Pump in my car. 24 lb injectors in my set up. No issues.
    ~David~

    My 1987 Crown Victoria Coupe: The Brown Blob
    My 2004 Mercedes Benz E320:The Benz

    Quote Originally Posted by DerekTheGreat View Post
    But, that's just coming from me, this site's biggest pessimist. Best of luck

  3. #3
    Member of the Orb Alliance packman's Avatar
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    Holley/Walbro 255lph pump in mine; but haven't done the 1st start yet to say how it works (or not).

  4. #4

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    Quote Originally Posted by 87gtVIC View Post
    I have been running a Walbro 190 lph Fuel Pump in my car. 24 lb injectors in my set up. No issues.

    Quote Originally Posted by packman View Post
    Holley/Walbro 255lph pump in mine; but haven't done the 1st start yet to say how it works (or not).
    So end up somewhere around 200+lph and I'll likely be okay?

  5. #5
    Member of the Orb Alliance packman's Avatar
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    I would go large; just in case you get tired of the hi-po engine (judging by the "SpeedyEFI" thread) and decide to put something larger in there. At the least; you won't have to switch out the fuel pump when that time comes.

  6. #6
    The Brown Blob 87gtVIC's Avatar
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    I would go large as well if I were to do things again. Same with the injector size..though I am not reaching their duty cycle according to the datalogs.
    ~David~

    My 1987 Crown Victoria Coupe: The Brown Blob
    My 2004 Mercedes Benz E320:The Benz

    Quote Originally Posted by DerekTheGreat View Post
    But, that's just coming from me, this site's biggest pessimist. Best of luck

  7. #7

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    Quote Originally Posted by packman View Post
    I would go large; just in case you get tired of the hi-po engine (judging by the "SpeedyEFI" thread) and decide to put something larger in there. At the least; you won't have to switch out the fuel pump when that time comes.
    Quote Originally Posted by 87gtVIC View Post
    I would go large as well if I were to do things again. Same with the injector size..though I am not reaching their duty cycle according to the datalogs.
    Noted, and yeah, I may (will) get bored later on. But for the first iteration of a 'built' engine in this car, this should be plenty.

    Any aftermarket fuel pumps that won't require me using zip ties or something to hold it on the bracket properly?

  8. #8
    Member of the Orb Alliance packman's Avatar
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    There is a Sticky thread (Fuel Pump Upgrade) in this forum that outlines what's needed to fit aftermarket pumps into pre-1990 tanks. Sorry, I forgot what year your car is?

    Also, when reading that thread, skip down to the bottom of page 1; I initially used radiator hose to fill the boot; and discovered that it was the wrong hose to use. I later (bottom of the page) replaced that with fuel filler/neck hose instead.
    Last edited by packman; 04-15-2021 at 12:11 PM.

  9. #9

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    Quote Originally Posted by packman View Post
    There is a Sticky thread (Fuel Pump Upgrade) in this forum that outlines what's needed to fit aftermarket pumps into pre-1990 tanks. Sorry, I forgot what year your car is?

    Also, when reading that thread, skip down to the bottom of page 1; I initially used radiator hose to fill the boot; and discovered that it was the wrong hose to use. I later (bottom of the page) replaced that with fuel filler/neck hose instead.
    Gave it a look and it makes sense.

    Will I have too much fuel pressure if I run too much fuel pump? Or is there a return system on our cars to account for this? Because my current fuel system is fine as far as condition of the lines and such goes.

  10. #10
    Member of the Orb Alliance packman's Avatar
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    Fuel pressure regulator (FPR) adjusts your fuel pressure; regardless of your fuel pump volume. Stock FPR is located on the driver side fuel rail.

  11. #11

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    Quote Originally Posted by packman View Post
    Fuel pressure regulator (FPR) adjusts your fuel pressure; regardless of your fuel pump volume. Stock FPR is located on the driver side fuel rail.
    I gotcha. Wasn't sure about that.

    Does your Walbro plug in to your factory harness or did you need a wiring "kit"

    Looking at possibly getting these three pieces if needed then:
    https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1

    https://www.amazon.com/gp/product/B0...152QQOHM&psc=1

    https://www.amazon.com/Walbro-400-84...HYDAN4H0FY0FWC

  12. #12
    Member of the Orb Alliance packman's Avatar
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    I cut the Holley pump wires and spliced them onto the pump leads because the Holley pump had a plug on both ends; whereas the Panther pump wires has a plug on one end and is held in place by studs on the pump housing (on the other end). I bought a stock pump just for the housing; which has the appropriate connections on the outside of the pump. One of the pictures on the bottom of page 1 shows leads on the outlet of the pump housing. All I had to do was use the stock connectors at that point.

    My challenge was putting the tank back up. I had to buy threaded rod to cut my own studs for that.
    Last edited by packman; 04-16-2021 at 04:16 PM.

  13. #13

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    Quote Originally Posted by packman View Post
    I cut the Holley pump wires and spliced them onto the pump leads because the Holley pump had a plug on both ends; whereas the Panther pump wires has a plug on one end and is held in place by studs on the pump housing (on the other end). I bought a stock pump just for the housing; which has the appropriate connections on the outside of the pump. One of the pictures on the bottom of page 1 shows leads on the outlet of the pump housing. All I had to do was use the stock connectors at that point.

    My challenge was putting the tank back up. I had to buy threaded rod to cut my own studs for that.
    Ah, heard that. I didn't know if that was gonna be the same or if this was a different iteration of the car with the 255 installed.

    So, for the sake of being prepared, I'll probably get those three things then and see how it turns out.

  14. #14
    Member of the Orb Alliance packman's Avatar
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    That’s basically what I did. I did the fuel pump upgrade and the throttle body modification long before I parked the car.

  15. #15

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    Quote Originally Posted by packman View Post
    That’s basically what I did. I did the fuel pump upgrade and the throttle body modification long before I parked the car.
    Oh, awesome. Thank you!

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