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850 CFM Mighty Aluminum Demon Carburetor-Factory Refurbished

Mechanical Secondaries Down-Leg

Part # FRMAD-850-MS Be the first to write a review

850 CFM Mighty Aluminum Demon Carburetor-Factory Refurbished

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Emissions

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

See Emissions Details
This is an official Holley Performance Factory Refurbished Carburetor.

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

About Demon

Get classic modular performance when you shop for Demon carburetors at Holley.com. We offer numerous models for countless applications.

Barrels4
BoosterDown Leg
Brand Demon
CFM850
ChokeNone
ConditionFactory Refurbished
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 TypeFactory Refurbished Carburetor
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
WarrantySold As-is
UPC090127075609
Part NumberFRMAD-850-MS
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This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) 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


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with 5 3/16" x 5 5/8" bolt pattern. If you have a spreadbore style intake manifold, you will need an adapter to install this carburetor. Similar to the Mr. Gasket #1932. We have limited stock on this part and on rare occasion receive more orders that can be filled. If the part is oversold, backorders will be canceled and all payments will be refunded.
Sold As-is: See Details
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    *Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

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