Hi-Flow Accelerator Pump Nozzle Screw

The Hi-Flow Accelerator Pump Nozzle Screw from Advanced Engine Design is a precision fuel system component designed for both carbureted and modern fuel-injected engines. This essential fastener optimizes cold-start and acceleration enrichment, making it a vital part of tuning for mechanics and engine builders.

Engineered to Advanced Engine Design's exacting tolerances, this nozzle screw features precision metering geometry that regulates the fuel volume injected during rapid throttle openings. Its internal orifice diameter and seat design work in conjunction with the pump discharge circuit to ensure seamless acceleration without hesitation or fuel stumble.

Carburetor enthusiasts, restoration specialists, and tuners working on muscle cars, hot rods, and vintage imports will find this nozzle screw indispensable for fine-tuning the pump circuit during carburetor setup. With its compact size, it installs easily into standard carburetor mounting bosses and is compatible with both single-stage and dual-stage pump systems.