Edelbrock 3670 User Manual - page 211
Features Available with Pro option only
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You may run single or dual GM digital mass airflow sensors in Speed/Density, greatly
increasing the adaptability of your system. You may choose to run MAF sensor/s as a
permanent installation for continuous learning of the VE map and compensation for
engine airflow mods or engine wear and degradation. Alternatively, You may also use
this tool to run one or two mass airflow sensor/s during dyno tuning sessions and remove
the sensor after the adaptive learn has completed; thus returning to an extremely
accurate calibration for true speed/density operation. To use this feature, you must have
the MAF enabled through the setup wizard and have selected speed/density as the
control method.
The Mass Airflow Adaptive Learning screen has a few different displays, as follows:
This portion of the display shows you the Current Volumetric Efficiency on the left and
the Normalized VE Error on the right. This gives you an idea of how the adaptive learning
is working, since the error values will get closer to zero as the "learning" takes place for
every speed and load. A low error (readings in the green band) indicate that the VE
values calculated are the same as the actual airflow measured by the sensor. Readings
above the green band indicate that the VE mapped values are too low. Conversely, when