This 2007 BMW 1 Series E82 with two turbochargers received an engine control unit calibration. The car was tested on a dynamometer before tuning; the video notes that the initial torque readings were consistent across repeated runs.

The video title gives a post-tuning result of 230 hp and 405 Nm, an increase of 42 hp and 50 Nm. The car was tested again after the software was written, and the video describes smooth power delivery without pronounced drops.

These figures apply to this particular vehicle. The actual result can depend on the condition of the engine, turbochargers and other components.