Holley Double Pumper carburetors are a performance upgrade for hot street cars and race vehicles, an American icon from factory muscle cars to the quarter mile. This 850 CFM model is designed for lightweight vehicles with a manual transmission or an automatic with a high stall and low rear gears, featuring dual accelerator pumps and dual feed fuel inlets for constant high-volume fuel delivery.
Specifications:
- CFM: 850
- Flange Type: Square/4150
- Body Finish: Polished/Shiny
- Choke Type: Manual, Cable-Driven
- Fuel Inlet: Dual
- Material: Aluminum
- Primary Main Jet: 80
- Primary Power Valve: 6.5
- Primary Pump Nozzle Size: 31
- Secondary Main Jet: 80
- Secondary Pump Nozzle Size: 31
- Throttle Bore: 1.750"
- Vacuum Ports: 1 Timed Spark, 1 Full, 1 PCV
- Country of Origin: USA
- Warranty: Manufacturer's Limited 90 Day Warranty
- Part Number: 0-4781S
Square bore flange with a 5-3/16" x 5-5/8" bolt pattern, replacing Holley, Edelbrock, Carter AFB, and Autolite-style carburetors; a spreadbore-style intake manifold requires an adapter for installation.
FAQ
What choke type does this carburetor use?
A manual, cable-driven, hand-operated choke for precise cold start control.
What kind of vehicles is it intended for?
Lightweight vehicles with a manual transmission, or automatics with a high stall speed and low rear gears.
What bolt pattern does it use?
Square bore flange with a 5-3/16" x 5-5/8" bolt pattern; a spreadbore intake requires an adapter.
How many fuel inlets does it have?
Dual feed fuel inlets for constant high-volume fuel delivery.
