Now that production of the new Model 3 is starting to stabilize, and with more and more hitting the roads in the US, Tesla has starting rolling out one of its most anticipated new software updates. The VDC replaces the standard stability control system, which typically only gives a vehicle the option to fully engage driver safety nets, reduce them, or turn them off. Tesla's solution still integrates stability control, but it gradually hands over more control to the driver.
It's best thought of as a virtual driveline, which will see more torque coming out of the rear axle motor in order to "rotate" the vehicle during cornering, switching to a front bias if that slide becomes "excessive". Thus, Track mode enables the Model 3 Performance to increase the car's ability to rotate through a turn. Unlike the on-off style switch of the BMW M5's all-wheel drive system, the Model 3 chooses to control the distribution of torque at the front and rear constantly, so after you've straightened up from a drift drive is reintroduced to the front axle.
Additionally, Track mode increases the electric car's regenerative braking. It also helps the VDC assist in rotation when the driver lifts off the accelerator. This ensures force is spread evenly, despite an open differential. The latter is achieved by "proactively" dipping the battery and drive unit temperatures both in preparation for your track session and immediately after, and upping the capacity of the refrigerant system "by overclocking the AC compressor into higher speed ranges".
Motor Trend's Randy Pobst recently logged a lap time of 1:21.49 in a Tesla Model 3 Performance with the finalized software and a set of 10mm-wider Michelin Pilot Sport Cup 2s and track-friendly Brembo brake pads. Tesla said it will also continuously update and improve Track mode in future over-the-air updates.