Description

750 CFM – 4150 – Mechanical Secondaries – Shiny – GasolineTumble polished shiny finish for good looksSmall block Chevrolet 1×4, 170 series blower calibrationManual (cable driven, hand operated) choke for precise cold start controlDual accelerator pumps for addition fuel under initial accelerationDual feed fuel inlets for constant high volume fuel deliveryMechanical Secondaries for perfect off the line launches4 corner idle allows you to precisely control your idle systemIntended for lightweight vehicles w/ manual trans or automatics with high stall low gearingBoost referenced power valve for proper enrichment under acceleration100% wet-flow tested by Holley technicians to assure it arrives ready to run!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 SuperchargerDouble 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.

Barrels: 4

Body Color:Polished Aluminum

Body Finish: Polished

Body Material: Aluminum

Booster Design: Downleg

Booster: Downleg

Carburetor Material: Aluminum

Carburetor Use: Performance and Race

CFM Rating:750

Choke Type: Manual

Choke: Manual

Color:Polished Aluminum

Condition: New

Cubic Feet Per Minute Rating: 750

Finish: Polished

Flange Shape: Square

Flange Type: Square/4150

Fuel Inlet: Dual

Fuel Type: Gasoline

Fuel: Gasoline

Grade Type: Performance

Linkage Attached: Yes

Marine Approved: No

Material: Aluminum

Model: 4150

Mounting Hole Quantity: 4

Primary Jet Diameter: 74

Primary Main Jet Size:74

Primary Power Valve: 10.5

Primary Pump Nozzle Size: 28

Secondary Barrel Type:Mechanical

Secondary Main Jet Size:84

Secondary Pump Nozzle Size: 31

Spacer Included: No

Supercharger Compatible:Yes

System Type: Draw Thru

Throttle Bore Diameter:1.688 inch