fits model: 650.

( Brand: Holley ), ( Manufacturer Part Number: 0-76651-1 ), ( Fitment Type: Performance/custom ), ( Material: Aluminum ), ( Choke Type: Mechanical ), ( Type: Holley Double Pumper ), ( Mounting Flange Type: Square Bore ), ( Oe/oem Part Number: 76651-1 ), ( Features: Down Draft ), ( Country/region Of Manufacture: United States ), ( Universal Fitment: Yes )
The Holley 0-76651-1 0-76651 650 CFM Ultra Double Pumper Carburetor is a high-performance fuel delivery system designed for automotive applications. This carburetor features a unique design that utilizes two separate pumps to provide ample fuel flow for large engines or high-performance applications.
The Ultra Double Pumper Carburetor is equipped with a manual choke system, allowing for easy starting in cold conditions. The choke mechanism is located on the side of the carburetor, making it easily accessible and convenient to use.
The carburetor body is constructed from high-quality aluminum, providing excellent heat dissipation properties. The base plate is also made of aluminum and features multiple bolt-on mounting points, making installation a straightforward process.
The Ultra Double Pumper Carburetor comes with a 650 CFM primary venturi and a 1150 CFM secondary venturi. The primary venturi is designed for idle and cruising applications, while the secondary venturi provides the necessary fuel flow for high RPM operation.
The carburetor utilizes Holley's Ultra Lite H-series butterflies, which are lighter and more responsive than traditional butterflies. The butterflies also feature hollow bodies, reducing their mass and improving throttle response.
The Ultra Double Pumper Carburetor is equipped with Holley's Synergy Fuel System technology, which allows for easy tuning and improved idle quality. The carburetor also features a removable float bowl gasket, making it easy to remove the float bowl for maintenance or tuning.
The carburetor comes with a multi-piece gasket set, making it easy to install and ensuring a perfect seal between components. The kit also includes various hardware, such as mounting bolts and fuel line fittings, making it a complete solution for your fuel delivery needs.
In summary, the Holley 0-76651-1 0-76651 650 CFM Ultra Double Pumper Carburetor is a high-performance, manual choke carburetor designed for large engines or high-performance applications. Its unique double pumper design provides ample fuel flow, while its manual choke system makes starting easy in cold conditions. The carburetor is constructed from high-quality materials, is easy to install, and is tunable for optimal performance.
The Holley 0-76651-1 0-76651 650 CFM Ultra Double Pumper Carburetor is a popular choice among automotive enthusiasts for its high performance and versatility. Here are some pros and cons to help you make an informed decision before purchasing this carburetor:
Pros:1. High Flow Rate: This carburetor offers a flow rate of 650 CFM, making it suitable for high-performance applications where large amounts of air and fuel need to be delivered to the engine.
2. Double Pumper Design: The double pumper design provides better vacuum and fuel pressure, resulting in improved idle quality and throttle response.
3. Manual Choke: The manual choke system provides easy starting in cold weather conditions.
4. Versatile Application: This carburetor is suitable for a wide range of applications, including muscle cars, hot rods, and race cars.
5. Easy Installation: The Holley Ultra carburetor is designed for easy installation, with a modular design that allows for easy customization and tuning.
Cons:1. Expensive: Compared to other carburetors in its class, the Holley Ultra 650 CFM carburetor is on the expensive side.
2. Requires Tuning: Like any high-performance carburetor, the Holley Ultra 650 CFM requires tuning to achieve optimal performance. This can add to the cost and time involved in the installation process.
3. Complex Design: The double pumper design and manual choke system add complexity to the carburetor, which may require more maintenance and attention than simpler designs.
Conclusion:The Holley 0-76651-1 0-76651 650 CFM Ultra Double Pumper Carburetor is a high-performance carburetor that offers excellent flow rates, vacuum, and fuel pressure. However, it comes with a higher price tag and requires tuning and maintenance. If you're looking for a high-performance carburetor for your muscle car, hot rod, or race car, and you're willing to invest the time and money into tuning and maintenance, then the Holley Ultra 650 CFM carburetor is an excellent choice.
Recommendation:If you're on a budget or looking for a simpler carburetor design, you may want to consider other options in the market. However, if you're serious about high-performance and are willing to invest the time and money into tuning and maintenance, then the Holley Ultra 650 CFM carburetor is a great choice. Just be sure to work with a qualified mechanic or tuner to ensure proper installation and tuning.
Looking inside the bowls it appears that has new gaskets and other parts.