30cc Accelerator Pump Kit

The Advanced Engine Design 30cc Accelerator Pump Kit is a complete replacement diaphragm assembly designed for Holley carburetors. This kit supplies the critical fuel charge needed during throttle acceleration, delivering a momentary enrichment burst that prevents bog and hesitation when the throttle plate opens. The 30cc displacement is the standard capacity for most Holley four-barrel applications, making this accelerator pump kit a direct-fit solution for anyone rebuilding or servicing their Holley carburetor.

This complete accelerator pump kit for Holley carburetors includes the diaphragm, spring, arm, cam, cover, and all required hardware. The diaphragm is the wear component that deteriorates over time—cracks, tears, or hardening prevent proper fuel delivery during acceleration. Replacing the entire 30cc pump assembly restores the original calibrated response and eliminates stumbling or flat spots that indicate a failing accelerator system. The spring tension and mechanical linkage between the throttle arm and diaphragm work together to meter the correct fuel volume at the precise moment the driver demands power.

This kit is essential for carburetor restoration, engine rebuilds, and tuning work on street, strip, and vintage applications running Holley four-barrel carburetors. Whether you're diagnosing hesitation during hard acceleration or performing preventative maintenance during a full carb overhaul, the 30cc Accelerator Pump Kit from Advanced Engine Design ensures consistent throttle response and clean fuel delivery. Keep one on hand for immediate repairs or as part of a complete carburetor refresh.