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650 CFM Aluminum Mighty Demon Carburetor

Mechanical Secondaries Down Leg, 2x4 Blower

?
CFM
Booster
Secondaries

PART# MAD-650-B2

$788.95   Suggested Retail
$638.96   Holleydays Price
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Overview

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
  • 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

Specs

Barrels4
BoosterDown Leg
BrandDemon
CFM650
ChokeNone
Emission Code3
FinishShiny
FuelGasoline
Fuel InletDual
Idle Air Bleed Size73; 73
Idle Feed Restriction31; 31
MaterialAluminum
ModelDemon 4150 Mechanical Secondary
Needle and Seat Size110; 110
Primary Main Jet68
Primary Power Valve4.5
Primary Pump Arm Size30cc
Primary Pump CamPink
Primary Pump Nozzle Size33
Product TypeCarburetor
SecondariesMechanical
Secondary Main Jet76
Secondary Pump Arm Size30cc
Secondary Pump CamPink
Secondary Pump Nozzle Size33
Supercharged ApplicationYes
Throttle Bore1.688 inch
Venturii Size1.250 inch
Part NumberMAD-650-B2

Tech Resources

Service Parts

Emissions

This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

*Free Shipping & Handling only offered to the contiguous US on orders over $100.

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

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