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650 CFM Speed Demon Carburetor

Mechanical secondaries

Part # 1282020 Be the first to write a review

650 CFM Speed Demon Carburetor

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3

Emissions

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

See Emissions Details
The Speed Demon™ series is the most formidable performance street carburetor available today. 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 and in VE–series (vacuum secondaries, electric choke) or twin–squirter (mechanical secondaries) designs. Across the range of sizes, from 575 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, tow trucks, mild performance applications and crate motors. They are designed for engines with cam profiles between 220 and 240 degrees duration at 0.050".

Features:

  • Clear Dichromate finish for good looks and corrosion protection
  • Calibrated for stock and mild performance 283 - 390 cid V8 engines
  • Mechanical secondaries for awesome tire turning performance
  • Dual accelerator pumps for additional fuel under initial acceleration
  • 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

About Demon

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

Barrels4
BoosterAnnular
Brand Demon
CFM650
ChokeNone
Emission Code3
FinishClear Dichromate
FuelGasoline
Fuel InletDual
MaterialZinc
ModelSpeed Demon
Product TypeCarburetor
SecondariesMechanical
Supercharged ApplicationNo
Throttle Bore1.688 inch
Vacuum Ports1 timed (spark) port, 1 full, and 1 PCV port
Venturii Size1.280 inch
UPC792898304499
Part Number1282020
3

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