FUEL SYSTEM
The fuel system is made up of a fuel tank, fuel cock, an electrical fuel pump, a check valve, a pressure regulator, and the carburetors.
Fuel is fed to the carburetor float chambers by the boost pressure picked up from the surge tank. The excess pressure (which determines the rate of flow of the fuel) is channeled through the pressure regulator back into the fuel tank. The pressurized fuel goes through the check valve to the carburetor float chambers. Unlike conventional carburetors, the fuel in the float chamber must be pressurized so that it can be metered into the venturiis. If it were not pressurized, the higher pressure with which the air enters the carburetors as the result of turbocharging would prevent any fuel from leaving the carburetors.
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