Srxspec said:The injected Apex gets lower mileage than the carb RX-1 and the FX Nytro will get lower mileage than the RS Vector carb model! It takes fuel to create HP! The carb Vector motor has great performance and does not change performance in different temps, altitudes, etc. Putting fuel injection on would increase the hp but it would increase the price and lower the fuel mileage.