How do you get a good efficiency on drag racer v3?

To achieve good efficiency in Drag Racer V3, focus on optimizing your car's performance through careful tuning of parts such as the engine, tires, and transmission. Experiment with gear ratiOS to find the best balance for acceleration and top speed. Additionally, practice your timing on gear shifts to maximize power delivery. Finally, consider upgrading your car strategically to enhance performance while maintaining balance and control.