Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 73)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 66
The Main Tool Bar can also be used to access the “Fuel” table. From the Main BigComm software
screen tool bar left click on Fuel and the drop down screen will open.
Using the PC’s mouse, keep the left mouse button depressed and slide the mouse pointer down until
“Fuel Table” is highlighted. Release the left mouse button. The screen below will open.
33. Fuel Table
Note: In some cases, the ECU shipped with your system will come pre-configured with a table that
will closely match your engine configuration.
The Fuel table uses Volumetric Efficiency (VE) values in each of the 256 cells in the table.
Volumetric Efficiency is the measure for how efficient the engine is operating at a given engine speed
and load combination. The efficiency of the engine is nearly perfect, at a value of 100.
Volumetric Efficiency (VE) is highest at peak torque.
Note: If the fuel map VE values, around peak torque, are above 125, there is a good chance the
injector flow rates, inputted into the Operating Configuration/ Fueling Parameters table, are too low.
The opposite can also be true. If the VE values near peak torque are below 80, there is a good chance
the injector flow rates, inputted into the Operating Configuration/Fueling Parameters table, are too
high.
Fuel Table
Icon
Fuel table drop down
screen accessed from
the Main Tool Bar
The ellipse will move
throughout the Fuel table
relative to the current RPM
& Load “operating point”