Instructions
Click on the car you want to edit in "Nitto 1320 Legends." A list of available options will appear.
Click "Tune Ratios." The currently tuned ratios of the vehicle will appear.
Click the plus and minus signs beside the currently tuned number to adjust the Air Fuel and Fuel Flow of your vehicle. Increasing the Air Fuel will increase top-end speed, while increasing the Fuel Flow will increase your car's acceleration.