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Thread: 12-1800 for big HP E85 on street.

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  1. #1

    Default 12-1800 for big HP E85 on street.

    Hello. I'm looking to possibly run a Holley 12-1800 E85 compatible fuel pump on the street, but I'm concerned about the written warning about running past 20 minutes or over 90°F. If I could get a running time of 45 minutes then the pump would be perfect. So my question is would this pump stand up to longer running periods, if I ran a digital relay and duty cycled the primary pump down to say 40% duty? The idea would be to duty cycle the primary up to about 40% throttle and past 60% throttle, activate the secondary pump. I'm currently running a 12-1200 pump, so a direct drop-in would be ideal. This is all controlled by Dominator EFI.

  2. #2
    Join Date
    Dec 2009
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    The Holley 12-1800 fuel pump is not capable of circulating "hot fuel" in street driven applications. Read more about it here:
    http://documents.holley.com/flyer_ho...el_systems.pdf (Holley EFI Fuel Pump & Filter Catalog - Page 2 & 3)
    http://documents.holley.com/holleyfu...ems_chart1.pdf (Holley Fuel System Selection Chart)

    The newer Holley "hot fuel" capable (pump gasoline/street driven) fuel pumps are Walbro (internally).
    The race gas, diesel & E85 only fuel pumps are Delphi (internally). Their newest brushless fuel pumps are made by TI Automotive.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

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