3.5 Power Valve Assembly

The 3.5 Power Valve Assembly from Quick Fuel Technology is a precision-engineered fuel system component designed for serious engine builders and performance enthusiasts. This assembly is essential for those who demand accurate air-fuel ratio control across the full RPM spectrum, ensuring optimal carburetor function during various driving conditions.

This power valve regulates fuel enrichment in response to engine load changes, addressing drivability issues such as flat spots off idle or lean surge at cruise. The 3.5 designation refers to the opening pressure calibration of 3.5 inches of mercury, which determines when the valve transitions from idle to off-idle enrichment circuits. Its compact design allows for seamless integration into tight engine bay installations without requiring extensive modifications.

Street rod builders, circle track racers, and restoration shops will find this assembly beneficial when upgrading classic carbureted platforms to modern drivability standards. It is particularly suitable for naturally aspirated builds and mild supercharged platforms, where precise fuel control is critical for performance and efficiency.