850 CFM Mighty Aluminum Demon Carburetor

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Demon MAD-850-MS

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.

  • 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
More Information
PartDemon MAD-850-MS
Manufacturer Part NumberMAD-850-MS
UPC90127739945
BrandDemon
Barrels4
Carburetor UsePerformance and Race
CFM850
ChokeNone
ConditionNew
Emission Code3
FinishShiny
Fuel InletDual
MaterialAluminum
ModelMighty Demon
Part TypeCarburetor
SecondariesMechanical
Throttle Bore1.750 inch
Typeproduct
Item ReturnsThis item can be returned

Barrels4
BoosterDown Leg
BrandDemon
Carburetor UsePerformance and Race
CFM850
ChokeNone
ConditionNew
Emission Code3
FinishShiny
FuelGasoline
Fuel InletDual
High Speed Air Bleed33;33
Idle Air Bleed Size73; 73
Idle Feed Restriction36;36
Marine UseNo
MaterialAluminum
ModelMighty Demon
Needle and Seat Size120;120
Primary Main Jet86
Primary Power Valve4.5
Primary Pump Arm Size30cc
Primary Pump CamPink
Primary Pump Nozzle Size33
Product TypeCarburetor
SecondariesMechanical
Secondary Main Jet90
Secondary Pump Arm Size30cc
Secondary Pump CamPink
Secondary Pump Nozzle Size33
Supercharged ApplicationNo
Throttle Bore1.750 inch
Venturii Size1.560 inch
WarningCalifornia Proposition 65
WarrantyLimited 90 Day

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