This twin-turbo BMW E60 535d was tested in several stages to compare ECU calibration and the effect of an F-MIC intercooler. With the original software and standard intercooler, the dyno recorded 260 hp and 545 Nm. After the first calibration, it produced 320 hp and 656 Nm.

With the F-MIC intercooler installed and the same calibration retained, power changed little while the measured torque increased to approximately 673 Nm. The engine software was then revised again. An intermediate run recorded 335 hp and 700 Nm; the final dyno run showed 343 hp and 701 Nm. The small differences between runs may reflect the conditions of each test.

No pronounced black smoke was observed during the final check. The video demonstrates both the intercooler change and subsequent engine calibration; it does not attribute the entire power increase to the intercooler alone.