Accelerator Pump Kit

The Edelbrock Accelerator Pump Kit (part number 1470) is a direct-replacement accelerator pump assembly engineered for the Edelbrock Performer and Thunder AVS 800 CFM carburetors. This kit includes the 0.089-inch diameter plunger, precision spring, and sealing components required for proper fuel delivery during throttle transition. The Viton construction ensures chemical compatibility and extended service life across varied fuel formulations and seasonal storage conditions common in street and classic car applications.

The accelerator pump's primary function is to supply a metered fuel charge when the throttle is opened suddenly, preventing lean stumble and hesitation during acceleration. The 0.089-inch plunger displacement on this Edelbrock kit is sized to match the 800 CFM carburetor's air capacity, ensuring the fuel spray volume corresponds proportionally to the airflow increase. Viton seals resist fuel degradation and peroxide formation that can occur with ethanol-blended gasoline, reducing the frequency of pump rebuilds and maintaining consistent response over extended ownership periods.

This replacement kit addresses accelerator pump wear that develops after years of use—symptoms include delayed throttle response, bog on acceleration, or insufficient fuel spray during cold starts. Street rod builders, classic car restoration shops, and carburetor rebuilders rely on OEM-specification Edelbrock pump kits to restore original performance characteristics without requiring full carburetor replacement. The kit's compact design (1.6 × 1.25 × 5.1 inches) ensures straightforward installation on Performer and Thunder AVS models without modification to mounting surfaces or fuel bowl geometry.

Edelbrock accelerator pump components are manufactured to OEM tolerances, making this kit a reliable solution for carburetor maintenance and performance tuning across vintage and custom automotive applications. Whether diagnosing hesitation on a freshly rebuilt engine or preventatively servicing a high-mileage carburetor before summer driving season, this pump assembly delivers the precision fuel metering that street performance and restoration projects demand.