Maximum Speed Limitation

The DME limits the maximum engine speed by cutting out the injector valves.

The Siemens MS41.1 Control Module will shut down individual cylinders as required to prevent an over-rev situation when the engine reaches the maximum rev limit or maximum vehicle speed (128 MPH).

Just prior to the cut out point (engine or vehicle speed), the air fuel ratio is leaned out and the injectors are shut down individually as needed.