Engine Performance. The carburetor and fuel injection performance is mainly due to the amount of air and gasoline that can enter into the engine cylinders. The cylinders contain the pistons and combustion chambers where energy is released from the combustion of gasoline.o with a carburetor, the best fuel to air ratio for each cylinder is approximated for the best performance. However, carburetors do last longer than fuel injection systems and are favored in motor sports.