Fuel Settings


Fuel Adjustments Table

The Fuel Adjustments Table allows rpm-based adjustment of the air fuel ratio relative to the ECU's stock operation.  Moving a point up (or increasing the adjustment value by typing in the numeric table) makes the mixture richer; lowering it makes the mixture leaner.  An adjustment of, say, -5% means multiplying the stock fuel amount by 0.95 (delivering 5% less fuel than stock).  Most adjustments will be negative numbers since stock fuel delivery is a rather rich, conservative mixture.  Between rpm points, the ECU interpolates between the two adjacent rpm settings.

The adjustment described in the preceeding pargraph is fully applied only when the value for LoadFactor (essentially the same as Airflow/rev, or Boost) is above 1.6 (about 10 psi of boost).  Below a LoadFactor of 0.8 (roughly atmospheric pressure) none of the adjustment is applied.  Between a LoadFactor of 0.8 and 1.6, the adjustment is applied proportionally.  For example, a -5% adjustment value at a LoadFactor of 1.0 results in a -1.25% adjustment actually applied:

-5% * (1.0 - 0.8) / (1.6 - 0.8) = -1.25%

Multiple contiguous fuel adjustment points may be selected by holding the Shift key and using the mouse or the left/right arrow keys, and adjusted simultaneously in equal increments using the up/down arrow keys.

Settings

The Global fuel and Deadtime adjustments are intended to be used mainly to compensate for injectors and fuel pressure that differ from stock.  They are applied at all times.