.090in Bypass Pill Main Jet

The .090in Bypass Pill Main Jet by ENDERLE is a precision fuel metering component designed for high-performance carbureted engines and fuel delivery systems. This bypass pill serves as a critical calibration element in supercharger and blower applications, controlling fuel flow through bypass passages during acceleration and load transitions. Built for serious engine builders, mechanics, and drag racing enthusiasts who demand exact fuel atomization and lean-burn efficiency, this jet ensures your fuel system delivers the right amount of gasoline at the exact moment your engine needs it most.

Engineered with precision tolerances, the .090-inch orifice diameter of this main jet restricts fuel flow to a specific calibrated volume, making it essential for fine-tuning carburetor response and preventing rich-running conditions that waste fuel and reduce horsepower. ENDERLE, a legendary fuel system manufacturer, machines each bypass pill to exact specifications, ensuring repeatability across multiple test runs and sessions. The compact design—measuring just 2.9 by 0.55 by 2.95 inches and weighing a mere 0.01 lbs—allows for quick swaps during dyno testing or track tuning without requiring carburetor disassembly, saving you valuable setup time between runs.

This component is ideal for owners of supercharged or turbocharged vehicles running dedicated fuel systems, as well as vintage drag racers and street machine builders working with mechanical fuel pumps and carburetors. Installation involves simple insertion into the carburetor's fuel metering block or bypass circuit; no special tools are required beyond basic carburetor knowledge. Upsizing or downsizing the bypass pill orifice allows tuners to dial in exact air-fuel ratios for peak power output, eliminating guesswork and ensuring consistent performance across varying ambient conditions and boost levels.