That’s particularly tricky since most EVs use a direct-drive system, but there is still a gear reduction between the motor and the wheel. They calculated the drive ratio on-site, using the wheel speed and tire height.
In case you were wondering, the Lightning uses a 2:1 ratio on each motor.
Finally, the Lightning would cut power at around 70 mph. The power output dropped from above 500 hp to less than 200 mph. The power would eventually ramp back up at a speed of 107 mph. Interestingly, the Lightning’s smart ECU thought that all four wheels had left the ground, so it cut the power.
The solution was to use Dynocom’s virtual road simulator, which applies resistance to the rollers. This accurately simulates wind and road resistance, and finally, the Lightning provided consistent power.
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