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MAD-850-BT - 850 CFM Mighty Demon Carburetor - default Image
MAD-850-BT - 850 CFM Mighty Demon Carburetor - additional Image
MAD-850-BT - 850 CFM Mighty Demon Carburetor - additional Image
MAD-850-BT - 850 CFM Mighty Demon Carburetor - additional Image
MAD-850-BT - 850 CFM Mighty Demon Carburetor - additional Image
MAD-850-BT - 850 CFM Mighty Demon Carburetor - additional Image
MAD-850-BT - 850 CFM Mighty Demon Carburetor - additional Image

850 CFM Mighty Demon Carburetor

Mechanical secondaries Calibrated for blow-through applications

PART# MAD-850-BT

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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.

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:

  • Clear Dichromate finish for good looks and corrosion protection
  • Designed for well-prepared 425 - 540 cid engines
  • Calibrated to work with turbocharged and centrifically supercharged applications
  • Contoured venturii inlet offers balanced airflow for increased horsepower
  • Mechanical secondaries for awesome tire turning performance
  • Dual accelerator pumps for additional fuel under initial acceleration
  • Screw in air bleeds for precision tuning capabilities
  • Screw in idle feed restrictors for precise idle tunability
  • Billet Metering Blocks for exceptional fuel metering capacity
  • 4 corner idle allows you to precisely control your idle system
  • Billet Baseplate with Idle-Eze™ allows precision fine tuning of the idle speed resulting in a smoother transition from off-idle
  • Large capacity float bowls eliminates fuel starvation
  • Large glass float-level sight windows for easy and safe fuel level adjustments
  • Dual feed fuel inlets for constant high volume fuel delivery
  • “Quik Release” non-stick gaskets for easy jet changes

Specs

Barrels4
BoosterAnnular
BrandDemon
CFM850
ChokeNone
Emission Code3
FinishClear Dichromate
FuelGasoline
Fuel InletDual
MaterialAluminum
ModelMighty Demon
Product TypeCarburetor
SecondariesMechanical
Supercharged ApplicationYes
Throttle Bore1.750 inch
Vacuum Ports1 timed (spark) port, 1 full, and 1 PCV port
Venturii Size1.560 inch
WarrantyLimited 90 Day
Part NumberMAD-850-BT

Emissions

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

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

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

Tech Resources

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.

Warranty Information

Limited 90 Day: See Details
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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

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