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On a carbureted engine the fuel pressure may be 5-7 psi. Even with this relatively low pressure there are some things to keep in mind. Instead of using regular rubber fuel hose to install that new carburetor, a billet fuel log should be installed for a solid and leak-proof installation. BG Fuel Systems' billet aluminum fuel logs are made of aircraft-grade material. It offers spring-controlled fuel pressure at idle. They come equipped with triple O-ring seals and have provision for a fuel pressure gauge. The BG fuel logs range in price from $159 to $224.99.