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Thread: Holley 12-1800 PWM

  1. #1

    Default Holley 12-1800 PWM

    I have a first generation Dominator pump that I want to run in open loop. What frequency range does a 12-1800 need? Anyone using a Ford FPDM? Caravan cooling fan module?

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    19,275

    Default

    I don't think those fuel pumps are designed for PWM operation. If fuel pump output must be decreased, use one of these:
    https://www.holley.com/products/fuel...ess_fuel_pump/ (Brushless 2-Speed Fuel Pumps & Controller)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

    Default

    Thanks for your reply Danny. I will likely go with twin in-tank Aeromotive 340s. I hate the fact that the early pump will not last on pump gas. I was hoping that slowing it down would make them live. I have no plans to run anything but E85, but also drive my car everywhere. I should probably sell it, and not have to worry about getting caught out without E85. Does anyone know why pump gas kills these pumps, and other fuels don't?

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    19,275

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    Quote Originally Posted by brianj5600 View Post
    Does anyone know why pump gas kills these pumps, and other fuels don't?
    I don't doubt there were some unexplained Holley fuel pump failures, initially.
    However, a lot of these pump failures were due to the wrong fuel type usage.
    Pump gasoline requires a different (hot fuel handling) fuel pump, than E-85/Race Gas/Diesel fuel.

    The newer "pump gasoline" (hot fuel handling) Holley fuel pumps are Walbro (internally).
    The E-85/Race Gas/Diesel capable Holley fuel pumps are made be Delphi (internally).
    The newest Holley brushless fuel pumps are made by TI Automotive (internally).

    http://documents.holley.com/flyer_ho...el_systems.pdf (Holley Fuel Pump & Filter Catalog)
    http://documents.holley.com/holleyfu...ems_chart1.pdf (Holley Fuel System Selection Chart)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #5
    Join Date
    Nov 2013
    Location
    Chicago IL
    Posts
    1,958

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    I had the 12-1800 for over 4 years with ZERO ISSUES.
    The problem is not the pump, it was user install errors.
    And people don't report the good news. They only report the bad news, so you see all these people complaining about it, which seems like a lot when you don't have all the good stories to go with it. For the handful of bad stories, there are thousands of them working perfectly with no problems.
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

  6. #6

    Default

    I fully see your point about satisfied people not coming forward. At the same time, I fall into the category of 90°F+ ambient, and may have to run pump gas occasionally that Holley warns against. I ran an A1000 in front of the tank, across the front of the tank, and slightly above the tank bottom for over 4 years without problems. From instruction sheet has this in bold, "The pump should be mounted on a solid member, such as the chassis, with the pump outlet pointing forward or upward." There is absolutely no way for me to mount it aiming forward or upward. If I run the 12-1800, I will probably mount in inside the stock tank.

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