My first challenge was that I didn’t have any of the steering parts used in the original racer! Time for some thinking…if I was going to change how the steering worked I may as well upgrade the steering to use the new power functions servo motor.
Make a conversion cable for LEGO Mindstorms EV3 to control Power Functions 88004 Servo Motor (6000566) 15 Positions using Unregulated Motor Block on EV3 software. Port View Auto-ID function detect the conversion cable as EV3 L-Motor.
Power Functions Servo Motor turn through the 15 positions corresponding to the power levels of Unregulated Motor Block:
Position -7 Power: -100 (90 degrees counter-clockwise)
Position -6 Power: -88
Position -5 Power: -73
Position -4 Power: -62
Position -3 Power: -46
Position -2 Power: -34
Position -1 Power: -18
Position 0 Power: 0 (center)
Position 1 Power: 18
Position 2 Power: 34
Position 3 Power: 46
Position 4 Power: 62
Position 5 Power: 73
Position 6 Power: 88
Position 7 Power: 100 (90 degrees clockwise)
WARNING: Do not try to make this conversion cable unless you know exactly what you're doing! I will not be held responsible for any damages of your EV3 Intelligent Brick or any other parts!
This is the LEGO Power Functions Servo Motor (88004). With this Servo Motor you are able to build models such as vehicles with a true steering of the wheels. Just like the steering of a real car.