Precision-turbo-and-engine BigStuff3 GEN3 PRO SEFI System Hardware & BigC Manuel d'utilisateur

GEN3 PRO SEFI System System Hardware Installation & BigComm Software User Instruction Manual Revision 2.1 – December 201

BigStuff3 Pro SEFI System Version 2.1 – February 2011 10 Harness Label Wire Color/Connector Type Label Definition Connect To Further Details HEI

BigStuff3 Pro SEFI System Version 2.1 – February 2011 93 63. Boost Staged When “Staged” mode is selected the time intervals between the boost

BigStuff3 3 Stage Boost (Solenoid) Wiring GroundtexttextRelay8630858787aWet Nitrous / Boost SolenoidGroundA C DBtexttextRelay8630858787aWet Nitrous /

BigStuff3 Pro SEFI System Version 2.1 – February 2011 94 Boost Spark Tables 1, 2 & 3 The Boost spark tables allow the user to set the spar

BigStuff3 Pro SEFI System Version 2.1 – February 2011 95 Note: The timing values, inputted into the Start Line Timing table, are the absolute va

BigStuff3 Pro SEFI System Version 2.1 – February 2011 96 Release the left mouse button. The screen below will open. Left Click on the “Pick

BigStuff3 Pro SEFI System Version 2.1 – February 2011 97 After selecting a Dash to configure, “Signals” need to be selected and added to the Das

BigStuff3 Pro SEFI System Version 2.1 – February 2011 98 In the screen print below notice that the same “Signals” appear in the Dash at the bottom

BigStuff3 Pro SEFI System Version 2.1 – February 2011 99 Name the file “Default” and hit Save. By selecting “Default” as the file name, the Log W

BigStuff3 Pro SEFI System Version 2.1 – February 2011 100 The next time the BigComm software is opened it will automatically load and run the “D

BigStuff3 Pro SEFI System Version 2.1 – February 2011 101 70. BigStuff3 Data Acquisition As an option, the GEN3 ECU is capable of supporting both

BigStuff3 Pro SEFI System Version 2.1 – February 2011 11 Harness Label Wire Color/Connector Type Label Definition Connect To Further Details MAP

BigStuff3 Pro SEFI System Version 2.1 – February 2011 102 From this drop down screen, the following data Logging events can be configured:  C

BigStuff3 Pro SEFI System Version 2.1 – February 2011 103 bar. Keep the left mouse button depressed, and move the slide bar left or right to achi

BigStuff3 Pro SEFI System Version 2.1 – February 2011 104 An example log screen is shown below. In this example, the Log Window Dashboard was s

BigStuff3 Pro SEFI System Version 2.1 – February 2011 105 Release the left mouse button and the selected graph area will fill the screen. Again,

BigStuff3 Pro SEFI System Version 2.1 – February 2011 106 75. Dash/Logging procedure to record Data Log session 1. Select Dash from the Main Win

BigStuff3 Pro SEFI System Version 2.1 – February 2011 107 16. Once the Record Log session has timed out, you can either view the Logged data file

BigStuff3 Pro SEFI System Version 2.1 – February 2011 108 77. Configure Replay To configure Replay, open the Configure Replay drop down screen

BigStuff3 Pro SEFI System Version 2.1 – February 2011 109 Sample Rate Record Time (seconds) 20ms 76 40ms 152 60ms 228 80ms 304 During a Logging

BigStuff3 Pro SEFI System Version 2.1 – February 2011 110 Once 100% of the data has been transferred, a file is automatically written to the fol

BigStuff3 Pro SEFI System Version 2.1 – February 2011 111 EXTENED REPLAY FIRMWARE – IMPORTANT NOTICE! Please read carefully if your GEN3 syst

BigStuff3 Pro SEFI System Version 2.1 – February 2011 12 Primary Fuel Pump (LS) – (Single lead Packard connector with a single black/white wire).

BigStuff3 Pro SEFI System Version 2.1 – February 2011 112 DAE – (Data Acquisition of External) BigStuff3’s Data Acquisition External (DA

BigStuff3 Pro SEFI System Version 2.1 – February 2011 113  Pan Vacuum – The oil pan vacuum or pressure can be logged using a GM 2 Bar MAP, which

BigStuff3 Pro SEFI System Version 2.1 – February 2011 114 A Blue Ellipse will appear along the trace line highlighting the logged engine operati

BigStuff3 Pro SEFI System Version 2.1 – February 2011 115  Fill – Choosing “Fill” will open a secondary drop down- screen which allows the sel

BigStuff3 Pro SEFI System Version 2.1 – February 2011 116 81. Loading and Saving Calibration Files Calibration files can be saved to a file folde

BigStuff3 Pro SEFI System Version 2.1 – February 2011 117 to the “On” position. The ECU cannot be programmed and changes will not be saved with t

BigStuff3 Pro SEFI System Version 2.1 – February 2011 118 83. Load a Calibration To load a calibration file, previously saved to the PC’s hard

BigStuff3 Pro SEFI System Version 2.1 – February 2011 119 The following screen will open showing the status of the file loading. Once the file

BigStuff3 Pro SEFI System Version 2.1 – February 2011 120 86. Function or “Quick Keys” F1 = Cranking Table F2 = View Lambda Screen F3 = Fuel Tab

BigStuff3 Pro SEFI System Version 2.1 – February 2011 121  Note: A CD ROM disk is no longer supplied with a CD ROM software Disc, but one can be

Black/White wire from BS3 harness labeled “Primary Fuel Pump (LS)”Standard 40 Amp relaytexttextBattery or Vehicle Chassis GroundFuel Pump+Battery+-tex

BigStuff3 Pro SEFI System Version 2.1 – February 2011 122  Note: The inputs from this table are used by the ECU if “Alpha N” was the control alg

BigStuff3 Pro SEFI System Version 2.1 – February 2011 123  GM LS1 (24x crank wheel) System Main Wire Harness - http://bigstuff3.com/pdf/JMI-006-

BigStuff3 Pro SEFI System Version 2.1 – February 2011 124  Will the GEN3 ECU drive high and low impedance injectors? o Yes, it can drive both

BigStuff3 Pro SEFI System Version 2.1 – February 2011 125 o For Ford Modular COP engines the UEGOR value in the Dash must read 28. If a number o

BigStuff3 Pro SEFI System Version 2.1 – February 2011 126 o The Timer Enable wire must be used. o If there is a zero (0) timing retard value in

BigStuff3 Pro SEFI System Version 2.1 – February 2011 127  I do not think my injectors are pulsing. What can I check? o Make sure the BS3 and

BigStuff3 Pro SEFI System Version 2.1 – February 2011 128  Running rich at idle  A combination of the above items  Is there anything specia

BigStuff3 Pro SEFI System Version 2.1 – February 2011 129  I cannot see 100% of the BigComm tables. What should I do?  Make sure the sc

BigStuff3 Pro SEFI System Version 2.1 – February 2011 130  What dwell times should be used with the LS1 coils sold with my system?  With a 1

Red/White wire from BS3 harness labeled “Secondary Fuel Pump HS”Standard 40 Amp relayFuel Pump+texttextBattery or Vehicle Chassis GroundBattery+ -text

BigStuff3 Pro SEFI System Version 2.1 – February 2011 13 Fan Control (engine cooling fan) – (Single lead Packard connector with a single black wi

Black with red stripe wire from BS3 harness labeled “Fan (LS)”Standard 40 Amp relaytexttextBattery GroundBattery+-texttextSwitched 12 Volt LineGround+

BigStuff3 Pro SEFI System Version 2.1 – February 2011 14 Points – (Single white wire) Do not connect this wire if a factory ignition system is b

BigStuff3 Pro SEFI System Version 2.1 – February 2011 15 The positive and negative battery cable lengths have been designed (are long enough) to

BigStuff3 Pro SEFI System Version 2.1 – February 2011 16 To Negative Coil Lead or Points Input on Ignition System Connector Clip Top To BigStuff

BigStuff3 Pro SEFI System Version 2.1 – February 2011 2 Table of Contents Section Page(s) Hyperlink Frequently Asked Questions FAQs Key

BigStuff3 Pro SEFI System Version 2.1 – February 2011 17 Connector ClipGM High Energy Ignition (HEI) Pin-out Detail(For Distributors with External

BigStuff3 Pro SEFI System Version 2.1 – February 2011 18 GM Northstar Direct Ignition System (DIS) Pin-out DetailConnector ClipBigStuff HEI Harnes

BigStuff3 Pro SEFI System Version 2.1 – February 2011 19 CAM – [(Gray, 2-way Packard connector with a separate ground wire (3/8” ring terminal)]

BigStuff3 Pro SEFI System Version 2.1 – February 2011 20 BS3 2-by-2 IAC Connector Pin-out Identifier 4-by-1 In-line IAC Connector Pin-out Identif

BigStuff3 Pro SEFI System Version 2.1 – February 2011 21 Crank Trigger Reference BS3 Connector - A (Red wire) BS3 Connector - B (Black wire) MSD

BigStuff3 Pro SEFI System Version 2.1 – February 2011 22  Trigger three (3) stages of timing and/or boost control (connector locations B, C &

BigStuff3 Pro SEFI System Version 2.1 – February 2011 23 cells the staged boost and timing retard control will not work, since a zero value forces

Switched 12V from the vehicleBrake Switch -12V applied to this wire when the brake pedal is depressedBigStuff3 Base System - Data Log Trigger/Timer En

Switched 12V Source in the VehicleFoot brake Switch or Trans-brake Button(12V applied to this wire when foot or trans-brake button is depressed)Brake

BigStuff3 Pro SEFI System Version 2.1 – February 2011 24 2-Step (Yellow wire) The 2-step function is not a standard feature on the GEN3 distribut

BigStuff3 Pro SEFI System Version 2.1 – February 2011 3 Table of Contents Continued Chapter Page(s) Hyperlink 52 MAP AE Inc Rate 83 MA

Switched 12V Source in the VehicleFoot brake or Trans-brake Switch (12V applied to this wire when foot or trans-brake button is depressed)Brake Light

Switched 12V Source in the VehicleFoot brake Switch (12V applied to this wire when foot or trans-brake button is depressed)Brake LightsBigStuff3 - Dat

BigStuff3 Pro SEFI System Version 2.1 – February 2011 25 Main Fuse & Relay Back_to_Main_Fuse_and_Relay ECU 3-Amp Fuse This fuse protects

BigStuff3 Pro SEFI System Version 2.1 – February 2011 26 The main-harness-to-injector harness connection should be made on the end of the engine

BigStuff3 Pro SEFI System Version 2.1 – February 2011 27  The mounting angle of the sensor should be tilted a minimum of 10o to the horizontal t

BigStuff3 Pro SEFI System Version 2.1 – February 2011 28 The GEN3 system hardware installation process in now completed. The next step is to inst

BigStuff3 Pro SEFI System Version 2.1 – February 2011 29 Double click on the BigComm_Setup.exe link shown below.

BigStuff3 Pro SEFI System Version 2.1 – February 2011 30 Double click on “Run”. Download progress will be displayed as shown below. Again, d

BigStuff3 Pro SEFI System Version 2.1 – February 2011 31 The software will automatically install using the correct file hierarchy, which is C:\P

BigStuff3 Pro SEFI System Version 2.1 – February 2011 32 To create a link on your desktop, and in the short cut tool bar in the lower right-hand c

BigStuff3 Pro SEFI System Version 2.1 – February 2011 4 2. GEN3 PRO SEFI System Standard Features  Configurable Load & RPM axes to enable o

BigStuff3 Pro SEFI System Version 2.1 – February 2011 33 Lastly, if you want to open software put a check mark in the box next to Launch BigComm

BigStuff3 Pro SEFI System Version 2.1 – February 2011 34 CalPort Problems? If the RS-232 connector located at the end of the interfa

BigStuff3 Pro SEFI System Version 2.1 – February 2011 35 If the Com Port selected is not available, the following message will appear. Sele

BigStuff3 Pro SEFI System Version 2.1 – February 2011 36 following screen will appear. If the GEN3 ECU is not powered up (the ignition key is

BigStuff3 Pro SEFI System Version 2.1 – February 2011 37 Files/BigStuff/BigComm. Double left click on the calibration to be used for “off-line” m

BigStuff3 Pro SEFI System Version 2.1 – February 2011 38 Once communication has been established, the BigComm “Main Menu” screen will open and t

BigStuff3 Pro SEFI System Version 2.1 – February 2011 39 15. Closing Windows Open windows can be closed using the PC’s mouse. To close an open w

BigStuff3 Pro SEFI System Version 2.1 – February 2011 40 Hardware Configuration Table The Hardware Main Configuration table is relatively self-

BigStuff3 Pro SEFI System Version 2.1 – February 2011 41 system was supplied with the correct firmware and MAP sensor. Return_to_Main_Configurati

BigStuff3 Pro SEFI System Version 2.1 – February 2011 42 The paragraphs below outline how each operating parameter should be configured. The hype

BigStuff3 Pro SEFI System Version 2.1 – February 2011 5  Aesthetically pleasing, nylon braided wire harnesses with integrated ECU and Injector/W

BigStuff3 Pro SEFI System Version 2.1 – February 2011 43 operating temperature and preferred idle speed, adjust the TPS so that the TPS % value sh

BigStuff3 Pro SEFI System Version 2.1 – February 2011 44 Note: The 2-step functionality is a base feature on all coil-on-plug systems. 3-step con

BigStuff3 Pro SEFI System Version 2.1 – February 2011 45 Return_to_Crank_Trigger_Configuration COP - Setting the “Crank Reference” for Coil-on-Pl

BigStuff3 Pro SEFI System Version 2.1 – February 2011 46 “Dash” Window Static Test Timing (This feature is not functional with all released fir

BigStuff3 Pro SEFI System Version 2.1 – February 2011 47 Fuel Pump The Fuel Pump Configuration section has two input cells. Both input cells a

BigStuff3 Pro SEFI System Version 2.1 – February 2011 48  Input Shaft (Pulse/rev) – Assumes GEN3 system is equipped with the DAE option. Input o

BigStuff3 Pro SEFI System Version 2.1 – February 2011 49 This is the same table as is shown above with the window maximized. 20. Load vs. RPM

BigStuff3 Pro SEFI System Version 2.1 – February 2011 50 This capability is extremely important if the engine is fuel or spark sensitive at a give

BigStuff3 Pro SEFI System Version 2.1 – February 2011 51 The following table offers default Load schedules for 1, 2, 3, & 5 BAR MAP sensor app

BigStuff3 Pro SEFI System Version 2.1 – February 2011 52 21. Firing Order Once the Load and RPM axes have been configured, go back to the Configu

BigStuff3 Pro SEFI System Version 2.1 – February 2011 6 - Pan Vacuum - Accelerometer - Clutch or trans-brake input - TCC % slip -

BigStuff3 Pro SEFI System Version 2.1 – February 2011 53 At a given voltage, the minimum pulse width required to open an injector will vary based

BigStuff3 Pro SEFI System Version 2.1 – February 2011 54 You have now reached a milestone! The following necessary tasks have been completed:

BigStuff3 Pro SEFI System Version 2.1 – February 2011 55 24. AIR FUEL RATIO (F11 – (“Quick Key”) 25. Air Fuel Ratio Table Note: In some

BigStuff3 Pro SEFI System Version 2.1 – February 2011 56  Fill – Choosing “Fill” will open a secondary drop down- screen which allows the sele

BigStuff3 Pro SEFI System Version 2.1 – February 2011 57 Cell Values Selected in a Column13131413.9Interpolated Result from Cell Values Selected A

BigStuff3 Pro SEFI System Version 2.1 – February 2011 58 Normally Aspirated Street Engine 13.1 13.1 13.1 13.1 13.1 13.1 13.1 13.1 13.1 13.1 13.1

BigStuff3 Pro SEFI System Version 2.1 – February 2011 59 Turbocharged Engine (30 PSI) 13.1 13.1 13.1 11.5 11.5 11.5 11.5 11.5 11.5 11.5 11.5 11.5

BigStuff3 Pro SEFI System Version 2.1 – February 2011 60 27. Negative 02 Correction This table is configured and operates in the same way as t

BigStuff3 Pro SEFI System Version 2.1 – February 2011 61 29. AFR Parameters (F11 – “Quick Key”) The Air/Fuel Ratio (AFR) Parameters table allows

BigStuff3 Pro SEFI System Version 2.1 – February 2011 62 30. SPARK (F4 – “Quick Key”) There are several ways to access the base Spark table. Th

BigStuff3 Pro SEFI System Version 2.1 – February 2011 7 The gray 2-way connector kit below is the mating half connector to cam input. Fore more i

BigStuff3 Pro SEFI System Version 2.1 – February 2011 63 The Spark table uses actual timing values in each of the 256 cells in the table. The Spa

BigStuff3 Pro SEFI System Version 2.1 – February 2011 64 Cell Values Selected in a Row30.5 27.8 27.8 27.8Interpolated Result from Cell Values Sele

BigStuff3 Pro SEFI System Version 2.1 – February 2011 65 Cell Changes using the “Page Up” & “Page Down” Keys (Fuel and Spark Tables) Multip

BigStuff3 Pro SEFI System Version 2.1 – February 2011 66 The Main Tool Bar can also be used to access the “Fuel” table. From the Main BigComm so

BigStuff3 Pro SEFI System Version 2.1 – February 2011 67 The Fuel table allows the user to input desired (VE) values for sixteen (16) engine speed

BigStuff3 Pro SEFI System Version 2.1 – February 2011 68 Cell Values Selected in a Row70 70 70 80Interpolated Result from Cell Values Selected Abo

BigStuff3 Pro SEFI System Version 2.1 – February 2011 69 Next, depress and hold the keyboard “Shift” key. Now, use the arrow keys, to maneuver th

BigStuff3 Pro SEFI System Version 2.1 – February 2011 70 To configure engine starting fuel, go to Starting on the Tool Bar. Left click on “Starti

BigStuff3 Pro SEFI System Version 2.1 – February 2011 71 To change a value in the Cranking table, move the cursor using the PC’s mouse or arrow ke

BigStuff3 Pro SEFI System Version 2.1 – February 2011 72 To change a value in the After Start Correction table, move the cursor using the PC’s mou

BigStuff3 Pro SEFI System Version 2.1 – February 2011 8 The instructions below are specific to the BigStuff engine management systems. Hyperlinks

BigStuff3 Pro SEFI System Version 2.1 – February 2011 73 39. Idle The “Idle” drop down offers the user five tables to calibrate the engine idle q

BigStuff3 Pro SEFI System Version 2.1 – February 2011 74 41. Desired Idle RPM The Desired Idle Rpm table allows the user to set the desired engin

BigStuff3 Pro SEFI System Version 2.1 – February 2011 75 While the engine is running, a “real-time Ellipse” will move within the Idle Spark table

BigStuff3 Pro SEFI System Version 2.1 – February 2011 76 44. IAC Gain Terms This input table allows the user to set how quickly the IAC motor m

BigStuff3 Pro SEFI System Version 2.1 – February 2011 77 Again this is an iterative process. If the timing values within the orange square ab

BigStuff3 Pro SEFI System Version 2.1 – February 2011 78 TPS % 0 8 16 24 32 40 48 56 IAC 5 25 50 90 122 133 144 150 If the TPS is not ad

BigStuff3 Pro SEFI System Version 2.1 – February 2011 79 45. Warm Up Before the engine reaches normal operating temperature, i.e. 180o addition

BigStuff3 Pro SEFI System Version 2.1 – February 2011 80 47. MAP vs. Coolant The GEN3 ECU’s MAP vs. Coolant table offers an improved warm

BigStuff3 Pro SEFI System Version 2.1 – February 2011 81 48. TRANSIENT FUEL Transient Fuel is the fuel added to the engine during non-steady s

BigStuff3 Pro SEFI System Version 2.1 – February 2011 82 49. Power Valve Fuel (F10 – “Quick Key”) The first table is Power Valve Fuel. It is us

BigStuff3 Pro SEFI System Version 2.1 – February 2011 9 Harness Label Wire Color/Connector Type Label Definition Connect To Further Details Calpo

BigStuff3 Pro SEFI System Version 2.1 – February 2011 83 Same screen as above with the window maximized. 51. MAP AE Decay Rate The third t

BigStuff3 Pro SEFI System Version 2.1 – February 2011 84 To change a value in the MAP AE Decay rate table, move the cursor using the PC’s mouse or

BigStuff3 Pro SEFI System Version 2.1 – February 2011 85 Correction table’s value is used to increase the positive dMAP Correction value. Therefo

BigStuff3 Pro SEFI System Version 2.1 – February 2011 86 The first entry of the dMAP Parameter Configuration table is Asynchronous Acceleration En

BigStuff3 Pro SEFI System Version 2.1 – February 2011 87 where the acceleration event occurred (AE Position Correction). Below, is a description

BigStuff3 Pro SEFI System Version 2.1 – February 2011 88 2.0 ms) at a 24% throttle position, the ECU would immediately look up the corresponding A

BigStuff3 Pro SEFI System Version 2.1 – February 2011 89 58. Individual Cylinder - Spark The fixed inputs in the table below represent the firing

BigStuff3 Pro SEFI System Version 2.1 – February 2011 90 Individual Cylinder Fuel Correction Table – Base Systems Individual Cylinder Fuel Co

BigStuff3 Pro SEFI System Version 2.1 – February 2011 91 Keep the left mouse button depressed and slide the mouse pointer down until “Boost Par

BigStuff3 Pro SEFI System Version 2.1 – February 2011 92 The Stage timer starts once the following criteria are satisfied: Minimum RPM – This i