Journal

    Datalogging: how a calibration is checked on the road

    Requested versus actual values reveal how the engine behaves under load—when the test is safe and well designed.

    Datalogging: how a calibration is checked on the road — editorial illustration

    A datalog records ECU parameters while the engine operates. Comparing requested and actual values can reveal limits, corrections or inconsistencies.

    A useful test

    Use a warm vehicle, a safe environment and a focused parameter set. Logs do not provide certified power figures and never replace mechanical inspection.