Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 47)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 46
You have now reached a milestone! The following necessary tasks have been completed:
• The BigComm software has been installed
• Communication with the ECU has been established.
• The hardware and operating parameters have been configured.
The following sections of the manual will outline how to use the Air/Fuel Ratio table, O2
Correction tables and the Fuel Table. Calibrating the engine for steady state operation is an
iterative process using these tables.
The fuel calibration process, in order of importance, is as follows:
• The air/fuel ratio table will be configured to desired ratios for the different engine speed
and load combinations.
• The positive and negative O2 correction tables will be configured.
• The volumetric efficiency (VE) values in the Fuel Table will be calibrated.
Once these tables are configured, as a baseline, the
Calibrating_with_the_Trace_Function (a
great feature) can be used to fine tune the interrelationships of the aforementioned tables. The
“Trace” function allows the engine to be quickly calibrated “On-line” (ECU powered up) or
“Off-Line” (PC only). The Trace Function will be explained later in this manual.