Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 19)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 18
7. ECU Installation
The ECU must be installed in the passenger
compartment! The ECU has four ¼-20 x ½” threaded
isolation grommets threaded into the bottom of the
housing. Once installed, connect the two (2) 30-way
main wire harness header connectors to the ECU.
Note: If the factory installed isolation grommets are
not used to mount the ECU, threads into the housing
cannot extend beyond the ¼” factory installed depth.
Using bolts or threaded rods that are longer than ¼”
will damage the ECU and void the warranty!
The GEN3 system hardware installation process in now complete. 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, supercharged and turbocharged applications! The BigComm software was designed to
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 or XP
• 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).
• CD ROM disc drive.