racecar fuel delivery

ok guys all have good info here but you want your feed line at least 1 size larger into the pump then coming out. going into a y-block to do this isn't the same you still have the same size orifice, also place your regulator as close to the carb as possible. on a single carb application a -8 from the pump to the regulator and -6 to each carb bowl is plenty for running some 9 sec. quater mile times. also the carb is a restriction also due to the size of the needle and seats.