Product Details
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!
Specification
| Barrels | 4 |
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| Booster | Down Leg |
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| Brand | Holley |
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| CFM | 750 |
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| Choke | Manual |
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| Condition | New |
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| Emission Code | 3 |
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| Finish | Shiny |
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| Fuel | Gasoline |
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| Fuel Inlet | Dual |
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| Marine Use | No |
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| Material | Zinc |
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| Model | 4150 |
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| Primary Main Jet | 74 |
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| Primary Power Valve | 10.5 |
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| Primary Pump Nozzle Size | 28 |
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| Product Type | 4150 Model Carburetor |
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| Secondaries | Mechanical |
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| Secondary Main Jet | 84 |
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| Secondary Pump Nozzle Size | 31 |
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| Supercharged Application | Yes |
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| Throttle Bore | 1.688 inch |
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| Warranty | Limited 90 Day |
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| Part Number | 0-80573S |
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Delivery & Returns
Billy's Speed Shop ensures the highest standard of service. Therefore we use only most reliable delivery services in the UK what allows us to provide you quick and efficient delivery of your products.
We aim to stock all of the products in our warehouse. However the situation may occur that we currently do not have particular item in stock then we will order it directly from UK supplier. If delivery time will exceed 3 days we will inform you via email or telephone.
Our Delivery Options are as follows:
Parcels up to 2kg and up to £50 of value are being sent via Royal Mail - 1st or 2nd class.
Parcels up to 2kg and £50 - £100 of value are being sent via Royal Mail - 1st or 2nd class - Tracked.
Parcels over 2kg and over £100 of value are being sent via Courier - DPD Tracked.
Bulk or Heavy purchases that weigh over 20 kg are sent on a pallet - Pallex.
