Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 70)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 63
The Spark table uses actual timing values in each of the 256 cells in the table. The Spark table allows
the user to input Spark values for sixteen- (16) engine speed (RPM) and sixteen (16) load (MAP or
TPS) combinations. The X-axis represents engine RPM and allows for 16 inputs and the Y-axis
represents engine load and allows for sixteen (16) inputs as well. The X and Y-axes are configurable.
For information on how to configure the X and Y-axes see
Load_vs_RPM
While the engine is running, a “real-time Ellipse” will move throughout the Spark table relative to the
current RPM & Load “operating point”. Use it as a point of reference to help calibrate the Spark table.
To change a cell value in the Spark table, move the cursor using the PC’s mouse or the arrow keys to
the cell to be changed. Click on the cell and type a desired Spark value (from to 15.0 to 63.8) and hit
“Enter”
to save the change.
To make changes to multiple cells simultaneously, left mouse click and drag the cursor across the cell
range to be changed. Release the left mouse button and a secondary drop down screen will appear
outlining three potential “cell fill” options.
 Fill – Choosing “Fill” will open a secondary drop down- screen which allows the selected cells
to be changed to the value inputted into the window.
 Multiply – Choosing “Multiply” will open a secondary drop down-screen which allows the
values of the selected cells to be changed by the ” Multiply” value inputted into the window.
For example, if the values in the cells selected are 13 and the inputted “Multiply” value was 80,
the new cell values would be 10.4.
 Interpolate – If a series of cells in the same row are selected and the “Interpolate” “cell-fill”
option is selected the ECU will use the value in the cell all the way to the left and the cell value
all the way to the right and interpolate the numbers in between so that the values are linear.