5.5 Power Valve Assembly

The 5.5 Power Valve Assembly by Quick Fuel Technology is a precision fuel system component designed for carbureted engines that require responsive fuel metering under varying load conditions. This assembly is essential for engine builders and restoration specialists working with performance carburetors, where fuel delivery must dynamically adapt to throttle position and engine vacuum.

The power valve controls enrichment circuits, ensuring an adequate fuel supply during acceleration and wide-open throttle situations while maintaining efficiency during cruise and part-throttle operation. The 5.5 designation indicates that this assembly activates at 5.5 inches of manifold vacuum, a critical specification for proper carburetor tuning across various engine displacements and camshaft profiles. Quick Fuel Technology's power valve assembly features a spring-loaded diaphragm design that modulates fuel flow based on actual engine vacuum signals.

This assembly is ideal for street-driven classics, street rods, and high-performance carbureted engines where vacuum signal stability and fuel economy are important. Its compact design measures 2.9 x 1.05 x 4 inches, allowing it to fit seamlessly into most secondary fuel bowl configurations. The lightweight construction at 0.08 lbs minimizes the impact on fuel system dynamics and installation weight.