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Demon Carburetion SPD-850-VS

Speed Demon Aluminum Carburetor

Demon Carburetion SPD-850-VS


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Demon Carburetion SPD-850-VS Speed Demon Aluminum Carburetor $498.56
Speed Demon Aluminum Carburetor
  • 850 CFM
  • Vacuum Secondaries
  • Down Leg Booster
  • Shiny Finish

  • Demon Carburetion SPD-850-VS Details

    850 CFM


  • Barrels: 4
  • Booster: Down Leg
  • CFM: 850
  • Choke: Electric
  • Fuel: Gasoline
  • Fuel Inlet: Dual
  • High Speed Air Bleed: 28
  • Idle Air Bleed: 70
  • Material: Aluminum
  • Primary Main Jet: 68
  • Primary Power Valve: 6.5
  • Primary Pump Nozzle: 31
  • Secondaries: Mechanical
  • Secondary Main Jet: 78
  • Throttle Bore: 1.688"

  • Specifications:

    Without EGR
    Polished Aluminum
    Racing/Circle Track
    Manufacturer's Part Number:

    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.

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