Fitted an electric fuel pump today. Put it just below and close to the tank on a rubber mount with a pre pump washable filter. Started the engine up, but noticed the pump is running all the time even with the engine off. Not like an S.U. pump that starts and stops according to pressure. Thinking about putting in a fuel regulator as 40's don't need much pressure. I'd like to know what jet sizes people are using on Dellorto 40's as I would like to gain a bit more mpg if possible.