Accelerator Pump Nozzles

The Edelbrock Accelerator Pump Nozzles (MPN 1475) are precision fuel discharge components engineered for carbureted engines running Edelbrock Performer and Thunder AVS carburetors. These nozzles play a critical role in engine response during throttle transitions, delivering a measured fuel spray directly into the carburetor's intake passage to prevent lean-out conditions and stumble during acceleration. Whether you're restoring a classic muscle car, tuning a street rod, or maintaining existing carb performance, quality pump nozzles are essential to smooth throttle characteristics and reliable operation.

Constructed from durable aluminum in a natural finish, these tube-type nozzles are available in three orifice sizes—0.022, 0.024, and 0.043 inch inner diameter—to match your engine's displacement, carb sizing, and fuel demand characteristics. The precision-machined discharge hole controls the volume and atomization of fuel delivered during pump actuation, directly influencing throttle response and transition smoothness. Selecting the correct orifice size ensures the accelerator pump circuit delivers neither too much fuel (which causes rich surge) nor too little (which causes hesitation), making these components critical for proper calibration on any Performer or Thunder AVS platform.

Mechanics and enthusiasts rebuilding or fine-tuning Edelbrock carburetors will benefit from having multiple nozzle sizes on hand to dial in the ideal pump circuit for their specific engine combination. Original nozzles often wear or clog over decades of service, degrading throttle response and fuel economy; replacement is a straightforward, cost-effective upgrade during any carb overhaul. These nozzles are not universal—they are matched to Edelbrock's Performer and Thunder AVS designs—so verify your carburetor model before ordering. Compact and lightweight at 0.07 lbs, a set of these nozzles occupies minimal space in any shop or restoration toolkit.