Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 74)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 73
45. Warm Up
Before the engine reaches normal operating temperature, i.e. 180
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46. Air Temperature Correction
The inputs from this table are used by the ECU if “Alpha N” was the control algorithm selected
during the Main Configuration set up. If the “Speed Density” the control algorithm was selected,
the ECU ignores inputs from this table.
For Alpha N systems, the ECU uses input from this table for air temperature compensation. The
fixed numbers in the input table represent air temperature from –14.8
additional fuel is required as a
function of engine coolant temperature and manifold absolute pressure (for speed-density
applications). To calibrate “warm up enrichment” fuel go to the Main Tool bar and highlight
“Warm Up.” Keep the left mouse button depressed and slide the cursor down to select Coolant
Correction or Air Temperature Correction, depending on the table to be accessed.
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to 244
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F. The ECU uses
the user-defined inputs for each temperature point to add or subtract fuel relative to the base fuel
map values.
While the engine is running, a “real-time Ellipse” will move within the Air Temperature table
relative to the current engine Coolant Temperature “operating point”. Use it as a point of
reference to help calibrate the Air Temperature table.
To change a value in the Air Temperature table, move the cursor using the PC’s mouse or
arrow keys to the cell to be changed. Input the desired value and hit ‘Enter” to save the change.
The input values need to be smaller working from the left to right. As the engine warms up it
needs less Air Temperature correction (added fuel).