This 2005 BMW E61 3.5d had already been tuned at another workshop, but the owner was unhappy with its acceleration. The dyno check showed that the previous calibration produced about 366 hp, while torque remained around 560 Nm, close to the factory figure. The power delivery was also uneven.

After revising the software, we tested the car again. The video gives a result of 360 hp and 646 Nm. Compared with the factory figures of 272 hp and 560 Nm, that is an increase of 88 hp and 86 Nm.

This example shows why it is useful to assess the full power curve rather than a single peak figure. After the adjustment, the dyno result showed more torque with controlled power delivery.