Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 74)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 67
The Fuel table allows the user to input desired (VE) 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 Fuel table relative to the
current RPM & Load “operating point”. Use it as a point of reference to help calibrate the Fuel table.
To change a VE cell value in the Fuel 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 VE value (from to 15.0 to 200) 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.