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Thread: fuel bulbs boiling over

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  1. #1
    doug b Guest

    Exclamation fuel bulbs boiling over

    Bbc modified .. At 190" the primary and sometime secondary boil over... Not out of the breather tube....(850 carb .. Double pumper) (1958 chevy truck)tried heat sheild(plasttic 1 inch)sheilded fuel lines....aluminum radiator (2 -1 inch core) 2 electric fans .... A 160 " thermastate and a manual fan back on ... Which helped a little on the water pump.....float level perfect... Needle and seats perfect....anybody have any answers??? Maybe different system???

  2. #2
    Join Date
    Dec 2009


    Are you using too large of a fuel pump for your application?
    If you're dead-heading the fuel pump, you should consider a return style fuel pressure regulator.
    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/3000 RPM converter, FPP aluminum driveshaft, FPP 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 & MT 245/45R17 tires.

  3. #3
    doug b Guest


    yes i am using a regulator... i pulled this motor out of my jet boat and it ran it just over heats at 190 and overflows..i have also noticed when the water gets low in the radiator(half way) the pump stops pumping.. even with the water higher then the water pump.. i'm at my witts end for any ideas thanks doug

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