Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 35)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 28
The GEN3 system hardware installation process in now completed. The next step is to install the
BigComm software, which allows the sensor interfaces to be checked, and ultimately start and operate
the engine.
The remainder of the manual will describe how to install and use the BigComm software to monitor
and calibrate the GEN3 ECU parameters and variables.
8. BigComm Software Overview
The GEN3 system can be configured to operate on almost any engine configuration, normally
aspirated; nitrous oxide injected, supercharged and turbocharged applications! The BigComm
software was designed to control the engine and act as the interface between the BigStuff3 GEN3 ECU
and the engine it is installed on. View it as the screwdrivers and wrenches once used to make crude
adjustments to a carburetor. The BigComm software allows the user extraordinary fuel and ignition
system tune ability for improved performance and drivability.
The BigComm software allows full user access to all of the tables needed to calibrate the GEN3
system. Calibrations can be modified both “on-line” and “off-line”.
The engine control tables in the BigComm ECU are stored in non-volatile memory, allowing for the
stored information not to be lost when power to the ECU is removed.
The minimum computer requirements to run the BigComm software are:
 Microsoft Windows 95/98/Me/2000/NT/XP/Vista & Windows7
 300 MHz or faster Pentium processor.
 BigStuff3 recommends a minimum of 128K of RAM.
 RS-232 serial port recommended. A USB port can also be used with a port adapter (not
included).
Initial engine calibrations are best performed on a dynamometer. If the user elects to calibrate the
engine in the vehicle, BigStuff3 strongly recommends that two people be involved, one person to drive
the vehicle, the other to operate the laptop computer.
9. BigComm Software Installation
The GEN3 system software is available from the BigStuff3 website via:
www.BigStuff3.comm . From
the website home page, go to “Software Downloads” as shown in the screen print below.
Note: A CD ROM disk is no longer supplied with a CD ROM software Disc, but one can be purchased
from BigStuff3.