Fan Operation

The adjusted fan speed increases in a linear fashion as the cycle ratio increases. The rated speed (nNom) in the M3 is the same as the maximum number of revolutions (2,400 RPM).

The engine speed of the M3 is controlled in a linear relationship with the cycle ratio (10-91%), starting with 800 RPM (1/3 of nNom) up to 2,400 RPM.

In the E6x M5/M6 (600 W fan), from a 92% to 95% cycle ratio, an additional unregulated increase in engine speed to at least 2,700 RPM (nmax) is realized.