Gen3 pro sefi system standard features – Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software User Manual

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BigStuff 3 Pro SEFI System (LS1)

Version 1.1

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