Accelerator Pump Assmebly

The Edelbrock Accelerator Pump Assembly (MPN 1468) is a precision fuel delivery component engineered for carburetor systems that demand reliable throttle response and consistent acceleration. Built for Edelbrock Performer and Thunder AVS 800 CFM carburetors, this pump assembly restores or upgrades the transient fuel supply that enriches the air-fuel mixture during acceleration. Whether you're rebuilding a classic engine, refreshing a performance carburetor, or diagnosing lean hesitation on throttle application, this accelerator pump assembly delivers the precise volumetric control necessary for smooth power delivery.

This assembly features a 0.089-inch diameter plunger paired with a calibrated return spring and Viton seals, materials chosen to withstand fuel ethanol blends and prolonged engine bay temperatures without degradation. The plunger's diameter is the critical specification—it determines the volume of fuel delivered per pump stroke, and Edelbrock's 0.089-inch sizing is optimized for mid-range engine displacement and realistic street/strip applications. Included components eliminate the need for separate sourcing: the plunger itself, the spring mechanism, and seals are factory-assembled and tested for correct stroke depth and fuel delivery rate, reducing installation guesswork and ensuring carburetor tuning consistency.

Mechanics and engine builders rely on this accelerator pump assembly when older or worn pumps cause flat spots off idle or during gear transitions. Compatibility is direct with Edelbrock Performer series carburetors and the Thunder AVS 800 CFM model, both common choices for street performance and restoration projects. Installation involves disassembly of the carburetor's accelerator pump cavity, removal of the old plunger and spring, and insertion of the new assembly with proper orientation—a task suited for anyone with basic carburetor service experience. For accurate tuning, verify your carburetor model matches the Thunder AVS 800 CFM or Performer line before ordering; incorrect plunger diameter will compromise throttle enrichment and engine response.