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Home » Link ECU

Product ID: Link-Xtreme
Link Xtreme G4+ ECU
Link Xtreme G4+ ECU
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The G4Plus Xtreme offers the ultimate in engine management.

Designed and built to be the best, the Xtreme delivers the results, with more functions than normally demanded by both tuner and driver:


  • Eight saturated injection drives, eight ignition outputs, 11 analog volt inputs, 10 digital inputs, 10 auxiliary outputs *
  • Four temperature inputs
  • Two, thirty four pin, waterproof connectors
  • External, 2.5, 3, 4 or 7 bar, MAP sensor (sold separately)
  • CAN / RS232 port

Software - PCLink

  • Fast tuning with keyboard driven commands
  • Six hundred pages of help on "right-click"
  • Powerful logging analysis built into PCLink
  • Tabbed, user configurable layout


G4Plus Xtreme Key Features

The following list details why the G4Plus ECUs are so great, but if you talk to someone with a G4 or G4Plus system they love the powerful, smooth total experience :



  • Super smooth triggering for rock solid ignition timing thanks to the precision automotive microprocessor
  • Lamda and AFR tuning options - switchable as per user preference
  • OBD2 data stream by firmware upgrade
    • Connect up a blue-tooth or wifi adapter (available from your Link dealer, or e-bay etc).
    • Live data to your phone or tablet for graphical display of the ECUs data
    • Compatible with smartphones & tablets
  • Re-nameable labels for inputs and outputs
  • 20 General Purpose tables (up from 12 in G4)
  • Trigger Scope - Help diagnose triggering problems.
  • Metric and Imperial display modes - customise them how you want.
  • Up to 6 dimensions of Fuel and Ignition mapping
  • Advanced closed loop cam control (up to four cams)
  • 5 different fuel delivery modes including sequential and staged injection
  • Support for 6 different ignition system types including direct spark.
  • 77 pre-configured digital trigger modes (Aug 2013) and the ability to setup the triggers for engines without a pre-configured mode.
  • Rotary support - up to 4 rotor engines with sequentially staged injection.
  • Support for solenoid, stepper and e-throttle idle systems.
  • 5 dimensions of boost control with three switchable tables.
  • Motorsport features:
    • Anti-lag
    • Launch control
    • Gear cut control (flat shifting)
  • Up to two CAN communication buses
  • QuickTune - automated fuel tuning assistant.
  • Individual cylinder ignition and injection control.
  • Odd-fire and 2 stroke engines
  • On board logging:
    • Looping - able to continuously log, overwriting the oldest data.
    • Select up to 25 parameters to log and specify the rate each one is logged at.
    • Advanced PC Logging
  • Closed Loop knock control - More filter and gain channels than G4.
  • Statistics
  • Open and Closed Loop boost control
  • Flex fuel capable
  • Limiting
    • RPM
    • MAP
    • 2 x General Purpose
    • Speed
  • Air Conditioning system control
  • Starter Motor system control
  • Gear Detection - Now with support for CAN, Engine/Wheel speed, or Voltage based systems.
  • Electronic Throttle Control
  • Tacho output - with Tacho sweep
  • Speedo Output
  • Fuel Pump speed control
  • Closed Loop Lambda
  • Virtual Auxiliaries and Timers
  • Custom calibration tables for sensors

Features retained from the G4

  • Lightweight enclosure that incorporates an easy fit mounting bracket
  • Lightweight loom
  • Waterproof connectors
  • Up to 6D fuel and ignition mapping
  • Precision closed loop cam control (four cam, independent control)
  • Up to 8 channel sequential fuel and ignition
  • Large number configurable input and output channels
  • Digital triggering, all OEM patterns
  • Rotary - up to four rotors, fully sequentially staged injection and two rotary specific ignition modes.
  • OEM idle hardware supported
  • 8 injection drives
  • 5D boost control with three switchable tables
  • Motorsport features - antilag, launch, flat shift
  • Continuous barometric correction (on board)
  • CAN port
  • QuickTune - automated fuel tuning
  • Individual cylinder correction
  • Odd-fire engines & two-strokes
  • USB tuning cable included
  • Statistics recording into on-board memory
  • Gear compensation for boost control
  • Real time selectable dual fuel, ignition and boost maps
  • Sync and crank sensors can be a combination of Hall effect, variable reluctance or optical
  • Boost control referenced to gear, engine speed or throttle position
  • Up to 4MB internal logging memory
  • Staged injection
  • Closed loop knock control
  • Firmware updates available online (
Brief Specification
    • eight injection drives
    • eight ignition outputs
    • eleven analog voltage inputs
    • four analog temperature inputs
    • ten digital inputs
    • ten auxiliary outputs
    • two, thirty four pin, waterproof connectors
    • external, 2.5 bar or 5 bar, MAP sensor (sold separately)
    • optional internal e-throttle upgrade
    • all G4Plus Storm features

Quick Tune

Using PCLink, QuickTune is an interactive tuning tool that assists in time efficient fuel tuning.

A graphical display of Target lambda (desired lambda) and Actual lambda (measured lambda) is provided.   A dual pointer gauge allows the tuner to quickly see how close Actual lambda is to the Target lambda.  QuickTune can be setup to operate over the entire fuel table or just over a particular area.

QuickTune can be used in Manual or Automatic modes.  In Manual mode, QuickTune guides you to cell centering and advises you when is a suitable time to make a fuel table adjustment.   With the press of a key a calculated adjustment is made.  Often only one or two adjustments are required to tune each cell.  In Automatic mode QuickTune does all the adjustments for you.   This leaves the tuner free to operate the Dyno or perform other tuning work such as making ignition or cam angle adjustments.




  • Up to 440 Zone Fuel Table with configurable row and column centres. Configurable X and Y Axis Parameters
  • Multiple Fuel Tables, internally or externally switchable
  • Up to 6D Fuel Mapping
  • AFR / Lambda Target Table
  • Individual Cylinder Fuel Correction (3D or single cell)
  • Saturated Injection Drives
  • Injection Rate
  • Master Enrichment
  • Pre Crank Prime
  • Crank Enrichment
  • Post Start Enrichment
  • Warm Up Enrichment
  • Acceleration Enrichment
  • IAT Fuel Correction
  • Injector Deadtime Compensation
  • Overrun Fuel Cut
  • Idle Load Trims
  • Fuel Temperature Correction


  • Up to 440 Zone Ignition Table with configurable row and column centres. Configurable X and Y Axis Parameters
  • Dual Input Closed Loop Knock Control.
  • Crank Dwell Extension
  • Maximum Advance
  • Spark Duration
  • 3D Dwell Time Table. Configurable X and Y Axis Parameters
  • Multiple Ignition Tables - internally or externally switchable
  • Up to 6D Ignition Mapping
  • Individual Cylinder Ignition Trim
  • IAT Trim
  • Voltage Correction
  • ECT Trim
  • OEM Compatibility - support for almost all factory and after-market igniters
  • CDI Compatibility

Auxiliary Output Options

  • Each Output independently configurable
  • Unused ignition and injection outputs available as auxiliary outputs
  • General Purpose Output - combination of conditions
  • General Purpose PWM - combination of conditions plus 3D table
  • Continuously Variable Valve Timing Control
  • Closed Loop Idle Speed Control (E-throttle, Solenoid or Stepper (4 & 6 Terminal))
  • Fuel Pump
  • Fuel Pump Speed Control
  • Engine Fan
  • Air Con Clutch
  • Air Con Fan
  • Intercooler Spray
  • Tacho
  • Check Engine Light
  • Purge Solenoid
  • Oxygen Sensor Heater
  • Switched Cam Solenoid


  • Engine Temperature Dependent Soft and Hard RPM Limit

  • Engine Temperature Dependent Soft and Hard Boost Limit

  • Vehicle Speed Limit

  • System Voltage Limit

  • Two user configurable General Purpose RPM Limits 


  • Digital Trigger Decoding

  • Reluctor, Optical Proximity or Hall Sensors

  • Programmable filtering and arming thresholds

  • Configurable trigger patterns or preset triggering options.

  • Supports nearly all OEM trigger patterns and custom trigger arrangements

MotorSport Features

  • Antilag 

  • Launch Control

  • Gear Cut Control (Flat Shifting)

Variable Valve Timing

  • Up to 4 channel independent
  • Precision Closed Loop Control
  • 3D Target Tables with configurable X and Y axis controls
  • Preset or Custom Configuration
  • 38 Supported Engines - More modes added often. See the list of supported engines in PCLink.


  • Tuning Port USB on board
  • Serial RS232
  • One CAN bus


  • 40 MHz Specialised Engine Management Microprocessor
  • Ignition control to 0.1 degree, fuel to 0.01 ms
  • 32 Bit Calculation
  • 10 Bit ADC Resolution
  • 20000+ RPM
  • 4MB Non Volatile Flash


  • 8 Injection Channels
  • 8 Ignition Channels
  • 10 Auxiliary Outputs
  • 10 Digital Inputs
  • +5V Out
  • +8V Out
  • 4 Temperature Inputs
  • 11 0-5V Analog Inputs
  • 2 Trigger Inputs (Reluctor, Optical or Hall Sensors)
  • On Board Baro Correction (Real Time)
  • 2 Knock Inputs

Analog Inputs

  • Each channel independently configurable with preset or custom calibrations
  • Wideband O2 (from external controller)
  • Boost Adjust Signal
  • Configurable Fault Detection Settings
  • Voltage (0-5V)
  • Exhaust Gas Temperature (from external controller)
  • Throttle Position
  • Pressure (general purpose, fuel, oil)
  • Air Flow Meter
  • MAP
  • Temperature (coolant, IAT, general purpose)
  • Throttle Position
  • Narrow Band O2


  • Adjust ALL parameters in real time
  • Mouse or keyboard operation
  • Tuning
  • QuickTune - automated fuel self tuning
  • Logging Analysis
  • Diagnostic Information
  • Comprehensive On-Line Help for all Tuning Functions
  • Definable Screen Layouts
  • View over 400 possible runtime parameters

Boost Control

  • Engine Temp Correction
  • IAT Correction
  • Multiple Boost Tables
  • External Adjustment

Idle Control

  • Reliable and stable user configurable Closed Loop Control
  • Solenoid or Stepper Motor ISC Valve (2 / 3 wire solenoid, 4 / 6 terminal stepper)
  • Aircon, Engine Fan or Power Steer idle up
  • Open Loop Control Mode for diagnostics


  • Internal Temperature Range -10 - 85°C
  • Ambient Temperature Range -30 - 90°C
  • Voltage 8 - 22V
  • Operating Current 200mA
  • Electrical protection on all inputs and outputs


  • Length: 167 mm
  • Width: 126 mm
  • Height: 42 mm
  • Weight: 640 grams
  • Connector : 2 x 34 Pin Waterproof Automotive

Package Contents

  • Xtreme G4Plus ECU
  • 2 x 2.5 Metre Wiring Harness (loom A & B)
  • Mounting Brackets and Screws
  • Wiring and Installation Instructions

Manufacturing Standard

  • ISO 13485

Additional Accessories (Purchased Separately)

  • Intake Air Temperature Sensor
    • 3/8 NPT
    • Bosch push in
    • 14mm (Aluminium or Steel Mounting Bosses to suit)
  • Throttle Position Sensor
  • Link Ignitor
  • Narrowband Oxygen Sensor
  • Wideband O2 Controller & Sensor
  • MAP Sensors
    • 2.5 bar absolute (1.5 bar boost)
    • 5 bar absolute (4 bar boost)

List Price: $1,572.66
Price: $1,572.66

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