Tuesday Tech Question for 1/31/12:
I have a mechanical fuel pump that keeps the bowls of my carburetor full and a return line that takes excess fuel back to the tank. My racing buddies say that I need a fuel shut off valve in the main fuel line to the carburetor, is this true?
Fuel Pump Joe
Fuel Pump Joe,
Yes it is. In the 2012 NHRA Rulebook General Regulations, section 20, page 5, Pumps/Valves it states “Cars equipped with carburetor(s) or non-electronic fuel (EFI) systems but with mechanical non-OEM fuel pumps must have a quick-action fuel shutoff valve within easy reach of driver and located in the main fuel line between fuel tank and carburetor and/or injectors.”