Holley COMMANDER 950 - Manual (Page 56)

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APPENDIX 1 COMPLETE SOFTWARE OVERVIEW
Appendix 1 provides a description of all the software functions. It is not intended to describe how to tune an engine, but rather
to provide one section that details all the different screens that will be used.
FUEL
– These allow the user to alter the fuel specific parameters of the engine.
Main – This is the primary table the engine uses when it is running. Each box or “cell” contains a number representing the
injector pulse time. The larger the number, the longer the injector is pulsed, and the more fuel is delivered. The cells are
organized by engine speed (RPM) and load (MAP or TPS depending on whether speed-density or Alpha-N is selected;
typically, speed-density will be used). Typically, the greater the manifold pressure, the more fuel is needed. Also, the fuel
requirements vary with engine speed based on the breathing efficiency of the engine. If the ECU is attached to the PC, the cell
background color will change to indicate which cell is being utilized by the ECU for its fuel calculations. This cell background
color change will move around as the engine speed and load change.
When first brought up, the cursor will be in the lower left corner of the cells. Obviously, you can use the mouse to move the
cursor to different cells, but it is probably more beneficial to use the arrow keys. When using the arrow keys, the number in
the cell will be highlighted so you can immediately type a new number to alter the fuel amount in that cell. You can also use
the up and down arrow keys with the shift or control keys pressed to increase the cell value. After using the arrow keys to
change the cell value or typing a new number, the data is not sent to the ECU until you press enter or move off that cell with
the arrow keys. All other cells in the system work the same way. Pressing ctrl-R will fill all cells in the row to the right of the
cell you are working on with the same value you just entered; this can greatly speed up the process of building a map from
scratch.
Another feature is the use of the “Cell action” function. If you click on one cell and click on another cell the square they create
will be highlighted yellow and a “Cell Action” window will appear. You can now type either +, -, *, /, =, or % followed by a
number and that action will be performed. For example, if you type “*1.5”, all the highlighted cells will be multiplied by 1.5 and
the new values sent to the Commander 950. If the “=” sign is used, a single number can be entered in all selected cells. For
example “=20” would put a 20 in all selected cells.
A very useful feature that is provided in the fuel map is that if a number is entered that will cause the injectors to become
static, that cell will be highlighted in red. This means that increasing this number further will not add any additional fuel to the
engine.
Figure 39