Mighty Demon

Screamin' Demon

Speed Demon

Holley is proud to announce that the next generation of Mighty Demon™ carburetors have arrived. They are available in a full range of sizes and options for your street/strip car. They feature billet-aluminum metering blocks, billet aluminum baseplates, large capacity fuel bowls complete with dual sight glasses, dual threaded inlets on each side, and internal baffling to prevent fuel slosh when you are on the track. For high horsepower street and race engines, the aluminum Mighty Demon™ delivers more power and performance for your race car.

Features:

• All aluminum polished construction with billet metering blocks and base plate (Now 40% lighter than the original Demons!)
• Fuel bowls and main body have been redesigned for a sleeker, 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
• Secondary fuel bowls include notched floats and jet extensions to prevent fuel starvation during hard launches
• 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
    

Screamin' Demons are the latest development in the evolving family of Demon performance carburetors. Screamin' Demons were designed with the weekend racer in mind. They are available in 650-850 cfm mechanical secondary models, as well as a 750 cfm vacuum secondary model. Screamin' Demons feature lightweight die-cast aluminum construction, large capacity fuel bowls complete with dual sight glasses, dual threaded inlets on each side, and internal baffling to prevent fuel slosh when you are on the track. Engineered and calibrated for better drivability and full throttle performance, Screamin' Demons include four corner idle, changeable idle and high-speed air bleeds with all the tunability that you would find from more expensive carburetors in the market.

Features:

• Polished die-cast aluminum construction
• Engineered and calibrated for better drivability and full throttle performance
• New throttle lever with integrated Ford A/T, 700-R4, and Chrysler kick down options
• Fuel bowls have dual threaded inlets on each side, dual sight glass windows, and internal baffling for improved fuel slosh control
• Secondary fuel bowls include notched floats and jet extensions to prevent fuel starvation during hard launches
• Changeable idle, high-speed air bleeds & power valve restrictions for precise tuning
    

The next generation of Speed Demon™ carburetors have arrived. The new aluminum Speed Demon™ series is the most formidable performance street carburetor available today and it's 40% lighter than the original. It features the most advanced design manufacturing processes that provides street enthusiasts with racing carburetor technology in a very drivable package. The Speed Demon™ 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 Demons deliver balanced, high-velocity airflow and exceptional fuel metering capacity to match the fuel requirements most street engines. A Speed Demon™ carburetor is 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".

Features:

• All aluminum polished construction with billet metering blocks and base plate (Now 40% lighter than the original Demons!)
• Fuel bowls and main body have been redesigned for a sleeker, 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
• New simple part numbering system: Start with SPD (Speed Demon) Add the carburetor cfm size (650, 750, or 850) and then add the model suffix; MS (Mechanical Secondaries); VS (Vacuum Secondaries); AN (Annular Discharge Boosters)