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750 CFM Supercharger Double Pumper Carburetor

Manual Choke Mechanical Secondaries

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CFM
Finish

PART# 0-80573S

$695.95   Suggested Retail
$563.36   Holleydays Price
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Overview

Holley Double Pumper® carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile. The Double Pumper is designed for use on lightweight vehicles with a manual transmission or an automatic transmission with a high stall and low rear end gears. The Supercharger Double Pumper with a tumble polished shiny finish and features dual accelerator pumps for additional fuel under initial acceleration; mechanical secondaries for great performance; dual feed fuel inlets for constant high volume fuel delivery and a manual choke for easy control of engine warm up. These carburetors that are intended for use with superchargers, and have a unique capability that allows their power valves to reference the intake manifold vacuum below the supercharger. This allows the power valve to operate as it should, based off intake manifold vacuum. A power valve provides further enrichment to the main metering system under load (low vacuum) conditions. Without this external referencing, the power valve would be "reading" the supercharger vacuum, which has no bearing on the engine load.

Features:

  • Tumble polished shiny finish for good looks
  • Small block Chevrolet 1x4, 170 series blower calibration
  • Manual (Cable driven, hand operated) choke for precise cold start control
  • Dual accelerator pumps for addition fuel under initial acceleration
  • Dual feed fuel inlets for constant high volume fuel delivery
  • Mechanical Secondaries for perfect off the line launches
  • 4 corner idle allows you to precisely control your idle system
  • Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
  • Boost referenced power valve for proper enrichment under acceleration
  • 100% wet-flow tested by Holley technicians to assure it arrives ready to run!

Specs

Barrels4
BoosterDown Leg
BrandHolley
CFM750
ChokeManual
Emission Code3
FinishShiny
FuelGasoline
Fuel InletDual
MaterialZinc
Model4150
Primary Main Jet74
Primary Power Valve10.5
Primary Pump Nozzle Size28
Product TypeCarburetor
SecondariesMechanical
Secondary Main Jet84
Secondary Pump Nozzle Size31
Supercharged ApplicationYes
Throttle Bore1.688 inch
Part Number0-80573S

Tech Resources

Service Parts

Emissions

This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing 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

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

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

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