The Holley Ultra XP Circle Track Carburetor is calibrated specifically for circle track racing, with an anti-siphon valve in the main body to reduce pump pullover and PTFE-coated throttle shafts riding in oil-impregnated bronze bushings for smooth actuation. It shares the Ultra XP platform's weight savings and 20 percent larger fuel bowl capacity.
Specifications:
- CFM: 750
- Model: 4150
- Secondaries: Mechanical (1:1 throttle actuation)
- Finish: Shiny
- Billet Color: Shiny with Black Billet
- Material: Aluminum
- Flange Type: Square/4150
- Fuel Type: Gasoline
- Fuel Inlet: Dual (-8 O-ringed)
- Carburetor Use: Professional Race
- Primary Main Jet: 78
- Secondary Main Jet: 86
- Primary Power Valve: 6.5
- Throttle Bore: 1.688 in.
- Venturi Size: 1.376 in.
- Warranty: Manufacturer's Limited 90 Day Warranty
- Part Number: 0-80813BKX
This carburetor is built with a dual mounting pattern, so it can be installed on a manifold machined for either a 4150 or 4500 series carburetor. It includes wedge floats and a set screw in the base plate for wide-open throttle stop adjustment.
FAQ
What is the 0-80813BKX carburetor calibrated for?
It's specifically calibrated for circle track racing.
What secondaries does it use?
Mechanical secondaries set up with 1:1 throttle actuation.
What type of floats does it use?
Wedge floats, included with the carburetor.
What intake manifolds fit this carburetor?
Its dual mounting pattern fits intakes machined for either a 4150 or 4500 series carburetor.
