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Demon Carburetion Mighty Demon Carburetors


Demon Carburetion
Demon Carburetion Mighty Demon Carburetors

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The Mighty Demon Carburetor has billet aluminum metering blocks, billet aluminum baseplates, large capacity fuel bowls with patented sight glasses, and patented streamlined air entries. Some of these features are found only on modified carburetors that cost much more, and several are available only on Demon Carburetors. These innovative ideas allow the new Mighty Demons to produce more power and achieve higher levels of performance than conventional designs. All Mighty Demon Carburetors have a "General Competition" tune-up but can be easily modified using BG Fuel Systems carburetor service and tuning parts.

Mighty Demon Blow-Thru Carburetors operate with up to 18 psi of boost and are available in 650, 750, and 850 cfm. They increase the vacuum signal to the carburetor under boost and enrich calibration. Equipped with annular boost venturi, large screw-in power valve channel restrictors in the metering blocks, and 0.130" needle-and-seat valves in the fuel bowls. The bowls also contain non-collapsible solid nitrophyl floats, unlike their brass counterparts. Air bleeds are appropriately sized. These new calibrations result in a flat fuel curve. Even at higher RPM, the main circuits sustain constant BSFC (Brake Specific Fuel Consumption) values and air-fuel ratios. The idle circuits, which often carry the responsibility for part-throttle cruising, will offer fine non-boosted drivability.

For high-output street engines and race engines, the Mighty Demon delivers the best performance value for the dollar!

  • Billet Baseplate with Idle-Eze
  • Billet Metering Blocks
  • Patented Concentric Venturi
  • Replaceable Air Bleeds
  • Replaceable Idle Feed Restrictors
  • Mechanical Secondaries
  • Patented Large View Sight Windows
  • Dual Inlets
  • No Choke Horn
  • Metering Blocks with Tunable Jets (Primary and Secondary Circuits)
  • 4-Corner Idle Adjustability
  • Built-In Power Valve Blowout Protection
  • Vacuum Ports (2 constant, 1 ported)
  • Most common tuning parts interchange from other manufacturers (Jets, Power Valves, Squirters, etc.)

    JEGS Easy Kits are designed by JEGS professionals to ensure that you get all the correct parts you need.



  • 15 Products
    650 cfm

    333-5282010GC
    Mighty Demon Carburetor
  • 650 cfm
  • Moderate 289-327 and Mild 350-406 Engines
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  • $634.95
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    333-5282010GCK
    Mighty Demon Carburetor Kit
  • 650 cfm
  • Moderate 289-327 and Mild 350-406 Engines
    Includes:
  • Mighty Demon Carburetor
  • 3/8" Dual Feed Fuel Line
  • Liquid Fill Fuel Pressure Gauge
    More info on Demon Carburetion 5282010GCK
    • FREE
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    Easy Kits
  • $704.99
    Ships

    333-5282020BT
    Mighty Demon Blow-Thru Carburetor
  • 650 cfm
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  • $674.95
    Order Today Ships 04/29/14
    750 cfm

    333-5402010GC
    Mighty Demon Carburetor
  • 750 cfm
  • Well-Prepared 350-406 and Mild 427-468 Engines
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  • $634.95
    Ships

    333-5402010GCK
    Mighty Demon Carburetor Kit
  • 750 cfm
  • Well-Prepared 350-406 and Mild 427-468 Engines
    Includes:
  • Mighty Demon Carburetor
  • 3/8" Dual Feed Fuel Line
  • Liquid Fill Fuel Pressure Gauge
    More info on Demon Carburetion 5402010GCK
    • FREE
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      & HANDLING!
    Easy Kits
  • $704.99
    Ships

    333-5402020GC
    Mighty Demon Carburetor
  • 750 cfm
  • Well-Prepared 350-406 and Mild 427-468 Engines
  • Annular Boosters
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    • FREE
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  • $634.95
    Order Today Ships 04/25/14

    333-5402020GCK
    Mighty Demon Carburetor Kit
  • 750 cfm
  • Well-Prepared 350-406 and Mild 427-468 Engines
  • Annular Boosters
    Includes:
  • Mighty Demon Carburetor
  • 3/8" Dual Feed Fuel Line
  • Liquid Fill Fuel Pressure Gauge
    More info on Demon Carburetion 5402020GCK
    • FREE
    • SHIPPING
      & HANDLING!
    Easy Kits
  • $704.99
    Order Today Ships 04/25/14

    333-5402020BT
    Mighty Demon Blow-Thru Carburetor
  • 750 cfm
    View this item
    • FREE
    • SHIPPING
      & HANDLING!
  • $674.95
    Ships

    333-5402020BTK
    Mighty Demon Blow-Thru Carburetor Kit
  • 750 cfm
    Includes:
  • Mighty Demon Carburetor
  • 3/8" Dual Feed Fuel Line
  • Liquid Fill Fuel Pressure Gauge
    More info on Demon Carburetion 5402020BTK
    • FREE
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      & HANDLING!
    Easy Kits
  • $762.99
    Ships
    850 cfm

    333-5563010GC
    Mighty Demon Carburetor
  • 850 cfm
  • Well-Prepared 408-540 Engines
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    • FREE
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      & HANDLING!
  • $634.95
    Order Today Ships 04/25/14

    333-5563010GCK
    Mighty Demon Carburetor Kit
  • 850 cfm
  • Well-Prepared 408-540 Engines
    Includes:
  • Mighty Demon Carburetor
  • 3/8" Dual Feed Fuel Line
  • Liquid Fill Fuel Pressure Gauge
    More info on Demon Carburetion 5563010GCK
    • FREE
    • SHIPPING
      & HANDLING!
    Easy Kits
  • $704.99
    Order Today Ships 04/25/14

    333-5563020GC
    Mighty Demon Carburetor
  • 850 cfm
  • Well-Prepared 408-540 Engines
  • Annular Boosters
    View this item
    • FREE
    • SHIPPING
      & HANDLING!
  • $634.95
    Ships

    333-5563020GCK
    Mighty Demon Carburetor Kit
  • 850 cfm
  • Well-Prepared 408-540 Engines
  • Annular Boosters
    Includes:
  • Mighty Demon Carburetor
  • 3/8" Dual Feed Fuel Line
  • Liquid Fill Fuel Pressure Gauge
    More info on Demon Carburetion 5563020GCK
    • FREE
    • SHIPPING
      & HANDLING!
    Easy Kits
  • $704.99
    Ships

    333-5563020BT
    Mighty Demon Blow-Thru Carburetor
  • 850 cfm
    View this item
    • FREE
    • SHIPPING
      & HANDLING!
  • $674.95
    Ships

    333-5563020BTK
    Mighty Demon Blow-Thru Carburetor Kit
  • 850 cfm
    Includes:
  • Mighty Demon Carburetor
  • -8AN Dual Feed Fuel Line
  • Liquid Fill Fuel Pressure Gauge
    More info on Demon Carburetion 5563020BTK
    • FREE
    • SHIPPING
      & HANDLING!
    Easy Kits
  • $762.99
    Ships

    15 Products