Where this will help is in vapor locks. This is where the fuel in the line before the pump is boiling.
This happens because fuel does not move if the carb is not calling for it. Also any liquid on the suction side will boil easier than when under pressure, why you don't here of FI cars having vapor lock as the line from tank to motor is under pressure. Look at a cooling system it uses a pressure cap as this will raise the boiling point of the coolant, IIRC 1 psi = 2 deg.
Because the pump can only pulp liquid and not vapor it locks the fuel from moving.
