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Demon Carburetion SPD-650-MS

Demon Carburetion Speed Demon Aluminum Carburetor


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Save $10 off $199, $45 off $499, $100 off $999. Promo Code: FALLFUN exclusions apply

Demon Carburetion Speed Demon Aluminum Carburetor $630.95
Out of stock
Speed Demon Aluminum Carburetor
  • 650 CFM
  • Mechanical Secondaries
  • Down Leg Booster
  • Shiny Finish
  • Demon Carburetion SPD-650-MS Details

    650 CFM


  • Barrels: 4
  • Booster: Down Leg
  • CFM: 650
  • Choke: Electric
  • Fuel: Gasoline
  • Fuel Inlet: Dual
  • High Speed Air Bleed: 31
  • Idle Air Bleed: 70
  • Material: Aluminum
  • Primary Main Jet: 70
  • Primary Power Valve: 6.5
  • Primary Pump Nozzle: 31;31
  • Secondaries: Mechanical
  • Secondary Main Jet: 76
  • Throttle Bore: 1.688"

  • Specifications:

    Polished Aluminum
    Without EGR
    Racing/Circle Track
    Manufacturer's Part Number:
    Shipping Weight:
    Package Height:
    Package Depth:
    Package Width:

    Everything you know and love about the original Speed Demon Carburetor Series, now in a 40% lighter design! Aluminum Speed Demon Carburetors features the most advanced design manufacturing processes that provides street enthusiasts with racing carburetor technology in a very drivable package.

    This carburetor line offers a wide range of sizes with vacuum and mechanical secondary designs. Across the range of sizes, from 650 cfm to 850 cfm, the Speed Demon delivers balanced, high–velocity airflow and exceptional fuel metering capacity to match the fuel requirements of most street engines. Ideal for muscle cars, stock rebuilds, mild performance applications, and crate motors. They are designed for mild engines from 302-427 cid with cam profiles between 220 and 240 degrees duration at 0.050".


    • All aluminum polished construction with billet metering blocks and base plate
    • Fuel bowls and main body have been redesigned for a more stylish appearance
    • Completely re-engineered and re-calibrated for better drivability and full throttle performance
    • Re-designed throttle lever with integrated Ford A/T, 700-R4, and Chrysler kick down options
    • Fuel bowls now have dual threaded inlets on each side, dual sight glass windows, and internal baffling for improved fuel slosh control
    • Changeable idle, high-speed air bleeds & power valve restrictions for precise tuning
    • Billet Baseplate with Idle-Eze allows precision fine tuning of the idle speed resulting in a smoother transition from off-idle

     JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.

    Easy Kits

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.