This 2006 Audi A6 with a 2.7 TDI engine had already been modified before the power work: the DPF, EGR and intake manifold flaps had been removed or disabled. The engine power calibration had not yet been changed after those modifications.

In that configuration, the dynamometer showed 170 hp and 398 Nm before chip tuning. A new program was then written to the engine control unit, followed by another dyno check.

This example distinguishes the initial reading after earlier hardware changes from the result after software calibration. A dynamometer helps assess the car’s actual output in its specific configuration.