The fuel delivery experts at Quick Fuel Technology designed this new Fuel Line/By-Pass Regulator combination (#34-4150-BP) that will keep the fuel cool by constantly flowing it through the lines.The QFT Fuel Line/By-Pass Regulator kit works for most 4150-style carbs and requires a fuel return line. Installing the QFT by-pass regulator helps prevent vapor lock and erratic throttle response during stop-and-go driving. The return line attaches to the bottom of the fuel regulator and should return to the top of the fuel tank. The return line needs to be the same size as the feed line. At idle, fuel demand is at it lowest, but the fuel pump continues to operate. If you have an electric fuel pump located near the tank, it applies pressure to the entire fuel line, raising the boiling point of the fuel. The line continues to soak up heat and as the fuel reaches the carburetor, it turns into foam and vapor resulting in poor performance. By circulating the fuel back to the tank, the fuel never sits inside the fuel inlet line, where excessive heat can cause fuel delivery problems.
Contact: Quick Fuel Technology at (270) 793-0900 www.quickfueltechnology.com