Link Engine Management G4X Atom X ECU

Link G4X AtomX ECU

Compact Yet Powerful

The Link G4X AtomX ECU is the latest version of Link’s entry-level engine control unit, offering improved responsiveness and expanded data logging. Despite its small size, it utilizes the same high-performance microcontroller as the entire G4X range, delivering enhanced speed and bandwidth compared to the G4+ Atom II.

Key Features

• Advanced Data Logging – 512MB of 32-bit logging, supporting up to 250 channels at a maximum of 100 kSamples/sec.
• Fast Communication – 8x faster communication speeds allow for quicker log downloads via a mini USB connection.
• Engine Compatibility – Supports up to 2 rotors or 4 cylinders with sequential injection and direct spark, or up to 8 cylinders in batch fire mode.
• Knock Control – Now included to enhance tuning and engine safety.
• Ideal for Tuned NA Engines – Designed for naturally aspirated setups needing tuning without additional sensors and features of higher-tier ECUs.

Engine Configurations

• 1-12 Cylinder Distributed
• 2-8 Cylinder Wasted Spark
• 1-4 Cylinder Direct Spark
• Odd Fire & 2-Stroke Engines
• Configurable Firing Order & TDC Points

Fueling Adjustments

• Up to 440-zone fuel table with configurable load and RPM centers
• 6D Fuel Mapping (3D table + overlay trim tables)
• Injector deadtime compensation and short pulse width adjustments
• Closed-loop lambda control
• Individual cylinder fuel trims
• Various enrichment options (crank, post-start, warm-up, acceleration)

Ignition Adjustments

• Up to 440-zone ignition table with configurable load and RPM centers
• 6D Ignition Mapping (3D table + overlay trim tables)
• Individual cylinder ignition trims
• Dwell time and spark duration control
• Voltage and engine temperature correction

Motorsport & Control Features

• Gear Shift Control (digital input)
• Engine speed and voltage limiting
• Vehicle speed limit
• Boost control with temperature correction and multiple boost tables
• Idle control with closed-loop and solenoid control options
• Auxiliary output controls for fans, fuel pumps, shift lights, air conditioning, and more

Processing & Hardware

• 150 MHz specialized engine management microprocessor
• 32-bit floating point calculations
• 12-bit ADC resolution
• Supports up to 20,000+ RPM
• 4GB non-volatile flash memory

Inputs & Outputs

• 4 injector drives (suitable for high-impedance injectors)
• 4 ignition channels
• 4 auxiliary outputs
• 2 digital inputs
• 3 analog inputs (0-5V)
• 2 temperature inputs
• Onboard barometric correction sensor
• Supports various sensors including wideband O2, MAP, IAT, coolant temp, and more

PCLink Software

• Full real-time tuning capability
• Automated fuel tuning with QuickTune
• Logging analysis and diagnostic tools
• Adjustable screen layouts with access to 300+ runtime parameters

Physical & Environmental Specifications

• Dimensions: 79mm x 126mm x 42mm
• Weight: 360g
• 34-pin waterproof automotive connector
• Operating voltage: 8-22V
• Internal temperature range: -10°C to 85°C
• Electrical protection on all inputs and outputs

Package Contents

• G4X AtomX ECU
• USB tuning cable
• Mounting bracket
• Wiring and installation instructions
• Link stickers (2 large, 2 small)

Additional Accessories (Sold Separately)

• Wiring looms
• Intake air temperature sensor
• Wideband O2 controller and sensor
• 3-channel Link igniter
• Throttle position sensor
• Injector ballast resistor packs

Requires an "A" loom for installation.