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Thread: F90000274 416LPH walbro E85 pump

  1. #1
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    F90000274 416LPH walbro E85 pump

    Has anyone run one of these in a turbo mopar? Looks like it will provide enough headroom for comfortable E85 use at 450hp/35psi boost at 44psi base pressure.



    https://www.summitracing.com/parts/v...hlSBoC9xHw_wcB
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    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

  2. #2
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    Re: F90000274 416LPH walbro E85 pump

    A friend ran one and it was enough for a cammed LS 6L with 15 psi and E85. Odd thing is, that GM drivetrain was installed in a Crown Victoria...
    “If the people of the nation understood our banking and monetary system, I believe there would be a revolution before tomorrow morning.” -Henry Ford

  3. #3
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    Re: F90000274 416LPH walbro E85 pump

    dang, I cant believe how bad it falls off at higher pressure, really makes you think...

  4. #4
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    Re: F90000274 416LPH walbro E85 pump

    Looking that the size of the rotor on the bottom it would require lots of torque to keep that thing spinning at high head pressure.
    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

  5. #5
    Moderator Turbo Mopar Staff Vigo's Avatar
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    Re: F90000274 416LPH walbro E85 pump

    What becomes interesting about that drastic decrease with higher pressures is that it isn't nearly as bad with two pumps in series. You see a lot of parallel pump setups on high hp cars, but if you are trying to run high fuel pressure without actually making a ton of power, you are better off with two pumps in series.

    Dont push the red button.You hear me?

  6. #6
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: F90000274 416LPH walbro E85 pump

    I think when you're at the point where you're worried that your high fuel pressure is going to over-tax your fuel pump, you are past the point of needing larger fuel injectors.
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  7. #7
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    Re: F90000274 416LPH walbro E85 pump

    I have 1100cc injectors. The goal is 450 crank hp with E85. I figured a max of 30-35psi, at 43.5 base fuel pressure which brings me to 75-80psi fuel pump pressure. With injectors that big I would need roughly 300Lph at 80 psi to handle full flow. With line losses and real world expectations I wanted something that could outflow my injectors. This pump popped up in my searches and I figured I would look into it.
    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

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    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: F90000274 416LPH walbro E85 pump

    Why not start with a lower base fuel pressure?
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  9. #9
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    Re: F90000274 416LPH walbro E85 pump

    If I drop to a base pressure of 35 psi (986cc) and figure fuel flow requirements for those injectors at 70psi (35lb boost) I still need a 240lph pump. A walbro 255 only flows 209 at 70 psi so still under my expected requirements especially when you factor in about 2psi drop for 10 feet of 5/16 fuel line.
    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

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    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: F90000274 416LPH walbro E85 pump

    Quote Originally Posted by shackwrrr View Post
    If I drop to a base pressure of 35 psi (986cc) and figure fuel flow requirements for those injectors at 70psi (35lb boost) I still need a 240lph pump. A walbro 255 only flows 209 at 70 psi so still under my expected requirements especially when you factor in about 2psi drop for 10 feet of 5/16 fuel line.

    Lower fuel pressure would help assuming you could use larger injectors to meet the demand.
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  11. #11
    Moderator Turbo Mopar Staff Vigo's Avatar
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    Re: F90000274 416LPH walbro E85 pump

    I agree that using high fuel pressure to bandaid too small of injectors is not usually a money saver unless you just have stuff laying around (besides bigger injectors!) which, at least in my version of the TM world, is often true.

    Dont push the red button.You hear me?

  12. #12
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    Re: F90000274 416LPH walbro E85 pump

    Lower fuel pressure would help assuming you could use larger injectors to meet the demand
    but what I worry about, that with large/high flowing injectors at low static pressure is how much loss of atomization occurs at idle and cruz? because if you set them at 35psi static, wouldn't that be at around 25psi under vacuum at idle?

  13. #13
    Moderator Turbo Mopar Staff Vigo's Avatar
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    Re: F90000274 416LPH walbro E85 pump

    Getting idle quality is a big concern when trying to run huge injectors at low pressure and tiny pulsewidths, especially if you are guessing on latency differences vs stock. But there are not many of us making enough power to run 'huge' injectors anyway.

    Dont push the red button.You hear me?

  14. #14
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: F90000274 416LPH walbro E85 pump

    If you're using modern injectors and engine management, you can get good idle quality with some pretty big CC's.

    I haven't yet, but I have seen it done. lol
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  15. #15
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    Re: F90000274 416LPH walbro E85 pump

    Cold starts with the 1100cc injectors are rough but once it's warmed up the idle is smooth as stock. I am running a flex fuel rail and regulator for the 43.5psi base pressure.

    The injectors I have have a minimum pressure of 30. https://www.rceng.com/Peak-Hold-Inje...200-P18C5.aspx
    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

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