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Rolling road tuning: Standalone ECU & Renault RS mapping

Link G4X Xtreme X ECU


The XtremeX is one of Link’s premium ECU’s with more inputs, outputs and features.

Typically dispatches in 2-3 days




The XtremeX is one of Link’s premium ECU’s with more inputs, outputs and features.
The XtremeX has built in E-throttle and all the advanced features including Anti-lag, Cruise Control and Traction Control.
With 8 Peak and Hold Injector drives and 8 ignition drives the XtremeX can control up to 4 rotors or 8 cylinders with sequential injection and direct spark. The XtremeX is a great choice for professional level motorsport or more demanding road car applications.

Requires “A” & “B” Looms/Connectors for installation.



8/10* x Digital inputs
4 x Temperature inputs
11 x Analog inputs
2 x Trigger inputs
2 x Knock inputs
*2 inputs required when using 2nd CAN Bus


8 x Peak and Hold injection drives
8 x Ignition drivers
10 x Auxiliary outputs^
+5V Sensor power supply
+8V Sensor power supply
^unused fuel and ignition drives can be used as additional Aux outputs


2* x CAN bus
1x Serial (RS232) connection
1x USB tuning connection
Faster communications than G4+ models
512 Megabytes Data Logging


Dimensions: 185mm(L) x 130mm(W) x 40mm(H) (without looms)
Mass: 680grams

Advanced features not found on the Storm:
Fully programmable E-throttle control complete with capability of gear shift throttle blip and antilag.
Cruise control.
Two independent CAN modules.
30 general purpose tables (up from 20)
All Motorsport features including full gear shift control, cruise control, traction control, antilag and launch control.
Advanced closed loop lambda strategy and dual bank lambda control.

What’s in the box?

Xtreme X
Supplied with USB tuning cable and mounting bracket.

Engine Configurations

1-12 Cylinder Distributed
2-12 Cylinder Wasted Spark
1-8 Cylinder Direct Spark
Odd Fire Engines
2-Stroke, 4 Stroke and Rotary Engines
Configurable Firing Order
Configurable TDC Points (for odd fire)


8 x Saturated Injector Drives (suits high impedance injectors)
8 x Ignition Channels
8 x Auxiliary Outputs (All PWM capable)
8 x Digital Inputs (All capable of reading frequencies up to 10kHz)
+5V Out
+8V Out
3 x Temperature Inputs
8 x 0-5V Analog Inputs
3 x Trigger Inputs (Reluctor, Optical or Hall Sensors)
On Board Baro

Fueling adjustments

Traditional, Modelled and Modelled Multi-Fuel Equations
Single-Point Group, Multi-Point Group, Sequential, Semi-Sequential, Group Staged, Sequential Staged and Sequential/Multi Point Group Staged injection modes
Asynchronous injection (can add more fuel after initial injection if conditions change)
Quick tune (automated fuel tuning)
Up to 440 Zone Fuel Table with configurable load and RPM centers. Configurable X and Y Axis Parameters
Multiple Fuel Tables
Up to 6D Fuel Mapping (3D Fuel Table + 3x3D Overlay trim tables)
Injection Rate Control for Group Injection Modes
Master Enrichment for Traditional Fuel tuning
Pre-Crank Prime
First Crank Prime
Crank Enrichment
Post Start Enrichment
Warm Up Enrichment
Acceleration Enrichment
IAT Fuel Correction
Injector Deadtime Compensation
Injector Short Pulse Width Compensation
Injector Timing Control with Beginning, Middle or End Injection Definable
AFR Table Correction
Dual Closed Loop Lambda
Individual Cylinder Fuel Trims
Overrun Fuel Cut
Idle Load Trims
Fuel Temperature Correction
Barometric pressure compensation
Injector test function

Ignition Adjustments

Distributor, Twin Distributor, Wasted Spark, Direct Spark, Rotary leading Wasted and Rotary
Leading Direct Ignition Modes
Up to 440 Zone Ignition Table with configurable load and RPM centers. Configurable X and Y Axis Parameters
Configurable Maximum Advance
Configurable Spark Duration
Configurable Spark Edge
Dwell Time Table with configurable X and Y Axis Parameters
Multiple Ignition Tables
Up to 6D Ignition Mapping (3D Ignition Table + 3x3D Overlay Trim Tables)
Individual Cylinder Ignition Trim
IAT Trim
Voltage Correction
ECT Trim
OEM Compatibility
CDI Compatibility
Transient ignition retard
Adjustable ignition delay compensation
Ignition test function
Idle ignition control


Engine Temperature Dependent Progressive Limiting
Dual Vehicle Speed Limits
System Voltage Limit
User Configurable RPM Limits based on external input
MAP Limit with dual tables
Optional hard cut
Progressive cut control
Selectable fuel or ignition limiting
Ignition trim and configurable trim decay
Adjustable control range
Selectable cut effect (adaptive or constant)

Auxiliary Output Options

Each Output independently configurable
Unused ignition and Fuel outputs available as auxiliary outputs
General Purpose Outputs
General Purpose PWM Outputs
Fuel Pump Control
Fuel Pump Speed Control
Engine Fan Control
Air Con Clutch Control
Air Con Fan Control
Intercooler Spray Control
Tacho Control
Speedo Control
Check Engine Light
Purge Solenoid
Oxygen Sensor Heater
Switched Cam Solenoid Control
ECU Hold Power Control
Shift Light Control
Starter Control
VVT Cam Solenoid
Boost Control Solenoid
Test functions for each output
Closed loop Stepper Control & Rotary Oil Pump Control
Idle Speed Soloenoid
Idle Speed Stepper
Internal Ethrottle Controller
External EThrottle

Digital Inputs

Each channel independently configurable with pull-up resistors and active state control
All digital inputs capable of reading frequencies of up to 10kHz
Duty Cycle measuring on all digital inputs
Turbo speed
Ethanol Sensor Control
Wheel Speed Detection on all digital inputs with additional general-purpose speed inputs
Anti-Theft control through digital inputs, over CAN or both
General Purpose switches, speeds, rpms and frequencies
large variety of input types

Analog Inputs

Each input independently configurable with preset or custom calibrations and configurable fault conditions
Built in Barometric Pressure Sensor
Large variety of Analog input functions
General Purpose Temperatures, Pressures, Rotary Switches and more
Built in Wideband Controller
Analog Inputs can also be used as Digital Inputs
Large number of built in calibrations
Ten Calibration Tables and 3 Linear Calibrations for when a custom calibration is required


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
Programmable Math Processing
Eight individually controllable math channels with up to four parameters in each
Math channels can be used as table axis’s and as digital or analog inputs
Motor-Sport Features
Anti Lag
Launch control
Gear Shift Control (Digital Inputs, Gear Lever Force or Gear Barrel Position)
Anti-Lag System
Dual 3D Fuel enrichment, Ignition cut and Ignition retard Tables
Optional Cyclic idle (normal and cool-down)
Optional 3D Idle controller Override Tables (one for Antilag and one for Cyclic Idle)
Lockout condiitons based on engine speed and throttle position with hysteresis

Launch Control system

Single RPM, 3D RPM Table or Latched (RPM when button pressed) Launch modes
Progressive cut control
Selectable fuel or ignition limiting
Selectable cut effect (adaptive or constant)
Adjustable control range
Vehicle speed controlled
Ignition Trim with optional 3D table and relative or absolute ignition angle options
Optional 3D Fuel Trim table

Gear Shift Control

Digital input (clutch switch), gear lever force (sequential gearbox), gear lever force (H pattern gearbox), and gear barrel position sensor input options
Timed or controlled modes
Adjustable progressive cut levels
Power re-introduction control
Ignition retard control
Fuel enrichment control
Cut duration based on gear

Idle Control

Solenoid, Stepper or EThrottle Control
Open or Closed loop actuator control and Closed loop Ignition control available
Large variety of position offsets for open loop and additional target offsets for closed loop actuator control
Specific start-up offsets and hold times
Dashpot functionality to smooth re-entry into idle and prevent undershoot
Electronic Throttle Control
Supports external EThrottle controllers
Multiple 3D target tables

Boost Control

Open or Closed Loop Boost Control
Multiple Target and Base Position Tables
Multiple Trim tables
Boost by Gear control

Knock Control

2 Built in Knock inputs
Fuel Enrichment and Ignition Retard functionality
Adjustable frequency filter
Adjustable gain (per cylinder)
Individual cylinder detection
Individual cylinder ignition retard and fuel enrich
Adjustable detection angle (start/end)
Noise threshold table (3D)
Adjustable ignition retard and fuel enrich sensitivity
Configurable ignition reintroduction and fuel enrich decay
Variable Valve Timing Control
Up to 4 cams independent control
Supports many OEM applications

Closed loop control

Multiple 3D Cam angle target tables
Optional advanced PID control settings for advanced tuners
Automatic function for calibrating cam angles

Chassis and Body

AC Control – Basic and Advanced modes available
AntiTheft – Via Digital Input, CAN or both
Gear Detection – CAN, RPM/Speed or Analog Position Sensor
Individual wheel speed sources with the ability to specify Driving and Non-Driving wheel speed sources
Starter control – Multiple options available from very basic to Touch to start.


512Mb of 32bit Internal logging memory
Up to 250 ECU Logging channels
Up to 1kHz per channel with a maximum total sample rate of 100kSamples/s when using ECU Logging
Unlimited channels when using PCLink logging


Tuning Port USB on board
One CAN bus
Custom CAN configuration allowing tuners and end users to add support for new CAN devices


150 MHz Specialised Engine Management Microprocessor
Ignition control to 0.1 degree, fuel to 0.01 ms
32 Bit Floating Point Calculation
12 Bit ADC Resolution
20000+ RPM
4Gb Non Volatile Flash


Internal Temperature Range -10 – 85oC
Ambient Temperature Range -30 – 90oC
Voltage 8 – 22V
Operating Current 200mA
Electrical protection on all inputs and outputs
Onboard Barometric Pressure Sensor


Length: 170 mm
Width: 130 mm
Height: 44 mm
Weight: 680 grams
Connector : Two x 34 Pin Waterproof connectors

Packaging Contents

G4X StormX ECU
Mounting Bracket
Wiring and Installation Instructions
2 large Link Stickers
2 small Link Stickers

Manufacturing Standard – ISO 13485

Additional information

Weight 2950 g
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