Quick Fuel Technology HR-680-VS Carburetor

Part Number
Hot Rod Series Carburetor; 680 cfm.; Vacuum Secondary; Electric Choke And Dual Metering Blocks
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The Hot Rod Series is a versatile performer designed for the most discerning street enthusiast. Featuring lightweight die-cast aluminum components, the Hot Rod Series offer all the tuneability you would expect from more expensive racing carburetors, including changeable bleeds, idle feed and power valve channel restrictions, and 4-corner idle. Offered in either vacuum or mechanical secondary models, all Hot Rod Series carburetors feature electric chokes and dual metering blocks for added performance. This all aluminum beauty is tumble polished for long lasting shine. All HR-Series carburetors are equipped with universal throttle levers to accommodate Ford A/T kick down, GM 700 R4 mounting holes, and ability to mount brackets for Chrysler vehicles. Now available in 450 CFM models for applications with small displacement engines.

BRAND: Quick Fuel Technology


  • Hot Rod Series Carburetor; 680 cfm.; Vacuum Secondary; Electric Choke And Dual Metering Blocks;
  • Screw-In Air Bleeds/Idle Feed Restrictions
  • Tumble Polished For Long Lasting Shine
  • Holley Performance Emission Code 3: 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
  • Dual Metering Block w/Four Corner Idle
  • Features A Fully Adjustable Electric Choke For Easy Starting
  • Universal Throttle Level w/Sealed Throttle Shafts
  • For Quick And Unsurpassed Tuning Capability
  • Tunable Secondary Opening Rate
  • Hot Rod Series Carburetor
  • Smooth and Efficient Idle Quality


Billet ColorDiecast-No Billet
Booster TypeDown Leg
Carburetor TypeHR-Series
EmissionWithout EGR
Fuel System TypeCarbureted
Fuel TypeGasoline
High Speed Air Bleed28
Idle Air Bleed Size70
Primary Main Jet70
Primary Power Valve65
Primary Pump Nozzle Size31
Secondary Main Jet74
Secondary TypeVacuum
Supercharged ApplicationNo
Throttle Bore1.6875 in.
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warning.ca.gov


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