Hardware & BigComm Software User guide

BigStuff 3 Pro SEFI System (LS1)

Version 1.1 3

2. GEN3 PRO SEFI System Standard Features

• Configurable Load & RPM axes to enable optimization in desired operating range

• Capable of driving 16 low impedance injectors in a staged configuration.

• “Wide Band Oxygen Sensor” (WB02) Air/Fuel Ratio (AFR) control to eliminate base engine and

transient fuel calibration guesswork.

• Capable of driving smart and dumb Coil-on-Plug (COP) ignitions with the stock sensors. The

“stock sensor” wire harness for the LS1 is currently available. The harness for the Mod 4.6L will

be available late 2004.

• Injector phasing, at the start of the fuel injection event.

• Programmable “peak-&-hold” injector drivers with current chopping capability.

• Ignition system type is software configurable for GM HEI, Ford TFI, LT1, V6_DIS, and IPU.

• Ford and GM IAC control.

• Self learning capabilities

• Individual cylinder fuel & spark compensation. Turbocharged starting line timing curve.

• Integrated 2-Step for Coil-On-Plug (COP) ignitions.

• 1, 2, 3, 4 & 5 BAR MAP sensor compatible

• Programmable injector opening vs. battery voltage.

• Improved transient fueling algorithms

• Seamless decel fuel cut-off

• Improved cold starting and drivability

• The Throttle Position Sensor voltage output is linearized between .5V and 4.5V for GM

and .9V to 4.5V for Ford.

• Low side fuel pump and engine cooling fan functionality, as well as ESC control

• Closed Loop PID WBO2 heater control to insure accurate and consistent AFR control

• Improved EMI algorithms

• True Speed-Density algorithm allows for easier tuning

• BigComm Windows 95, 98, 2000, NT & XP compatible calibration software

• Compact, black powder coated aluminum extruded ECM with integrated rubber isolators

• Electronics rated from -40

C to +105

• Aesthetically pleasing, nylon braided wire harnesses with integrated ECU and

Injector/WBO2 fuse protection.

• OEM style Packard & TYCO waterproof connectors & terminals