The BigStuff3 GEN3 PRO SEFI system is the fi rst

programmable “powertrain” control module for

“today’s” SEFI, Coil-on-Plug (COP) engines and

electronic controlled transmissions. The GEN3 PRO

SEFI system offers many unique features that sets it

apart from the competition. Features such as dual

“Wide Band Oxygen” (WB02) air/fuel ratio control,

individual cylinder & spark compensation and onboard

data acquisition are just the beginning!

The dual WBO2 functionality eliminates “left and

right bank” base engine and transient fuel calibration

guess work by providing accurate and consistent

air/fuel ratio control (9.5:1 to 15.9:1). The individual

cylinder fuel and spark compensation allows intake

manifold ineffi ciencies to be “calibrated out”. The

on-board data acquisition feature allows selected

powertrain management variables to be recorded

in real-time as fast as 50 times a second, with 10-bit

resolution, for up to 5.5 minutes. Once recorded, the

data can be analyzed off-line with the BigComm

software. These features, along with many others,

make the GEN3 PRO SEFI system “the most”

technologically advanced, cost effective SEFI

powertrain management system on the market.

– A Powertrain Control Module (PCM)

– Main Wire Harness (MWH)

– Injector Wire Harness (IWH)

– (2) WBO2 sensors

– BigComm Windows compatible calibration software

– 5' serial communication cable

The intuitive BigComm software enables real-time

calibration and measurement of all engine management

control variables via a serial PC link. The GEN3

PRO SEFI electronics are housed in a black powder

coated aluminum extruded enclosure with integrated

rubber isolator mounting provisions. The aesthetically

pleasing, nylon braided, MWH and IWH use OEM

style Packard and TYCO terminals and connectors.

Gold plated terminals are used for the (2) 6-way

MWH-to-WBO2 connections.

The GEN3 PRO SEFI system is compatible with most

GM style EFI sensors and actuators. The GEN3 PRO

SEFI ECM can be “software confi gured” to be compatible

with many OEM and aftermarket electronic

current feedback and tach output

– Fuel pressure – A/C on – Turbo shaft RPM

– Drive shaft RPM – Input shaft RPM – MPH

– Clutch or trans brake input – Brake pedal – TCC % Slip

– Fuel Pump – 2 spare high side & low side outputs

– Torque converter clutch – 1 spare PWM high side & low side output

– 2 or 3 stage boost control – Reverse lockout

– Fan low – Fan high