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Rolling road tuning: Standalone ECU & Renault RS mapping

Link Mitsubishi VR4 ECU


The Link G4X VR4Link VR4 PlugIn ECU fits the Mitsubishi VR4 4G63T.

Typically dispatches in 2-3 days



Free yourself from the constraints of the factory ECU.

The Link G4X VR4Link VR4 PlugIn ECU fits the Mitsubishi VR4 4G63T. The ECU PCB fits discretely inside the original factory enclosure.

Installation of Link’s VR4 ECU is a breeze, with no alteration of the factory wiring loom required. A built-in connector (or pins in some models) provides additional inputs and outputs such as oil pressure inputs or anti-lag / logging switches.

Factory features are supported – see Features for any exceptions.

Includes Integrated 4 Bar MAP Sensor.

G4X Plugin Key Features (Where Applicable)

Up to 6D fuel and ignition mapping
Precision closed loop cam control (four cam, independent control)
Sequential fuel delivery
Digital triggering, all OEM patterns
OEM idle hardware supported
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
USB tuning cable included
Stats recording into on-board memory
Gear compensations for spark, boost and fuel
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, speed or throttle position
512 MB data logging capability
Staged injection
Knock with “windowing”

The PlugIn ECU is capable of the following features, if the car it is being used in can support them.

Engine configurations are pre-set into PlugIn ECUs with a “start” base map.

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 High Current Injector Drives (suits high impedance injectors)
8 x Auxiliary Outputs (All PWM capable). Aux5-8 can control Stepper Motors and drive High or Low
11 Digital Inputs (All capable of reading frequencies up to 10kHz)
+5V Out
+8V Out
4 Temperature Inputs (Configurable pull-ups on ANT1&2)
12 x 0-5V Analog Inputs
2 x Trigger Inputs (Reluctor, Optical or Hall Sensors)
On Board Baro
3 Axis Accelerometer

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 3 axis accelerometer
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)
Traction control
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

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

Traction Control

Disable switch
Various Lockout conditions
Multiple 3D slip Threshold tables
Traction Control – controlled tyre slip to improve vehicle safety and driveability
Uses an advanced Torque Management system to reduce engine torque

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

Has an internal EThrottle Controller and supports external 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
Speed based cruise control (EThrottle only)
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.
Torque Management


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
Two CAN buses
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

Packaging Contents

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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