Link G4X AtomX ECU | Compact ECU with Knock Control

The Link G4X AtomX may be compact, but it’s loaded with serious tuning capability. It supports up to 4 cylinders (sequential) or 8 cylinders (batch fire), and now includes onboard Knock Control. This makes it perfect for street or race applications that don't need the full range of motorsport features but still demand reliable power and precision.

With upgraded logging, faster comms, and Link’s advanced PCLink tuning software, the AtomX is ideal for naturally aspirated engines needing a retune — all in a compact, affordable unit.

Requires an “A” loom (sold separately).

🔧 Key Features:

• Sequential injection and direct spark for up to 4 cylinders or 2 rotors
• Batch fire support for up to 8 cylinders
• Onboard Knock Control (DI4 shared input)
• Built-in Barometric Pressure Sensor
• PCLink tuning software with QuickTune and real-time adjustment
• 512MB internal logging memory with 250 channels @ 1kHz

🔌 Inputs & Outputs:

• 4 x Injector Drives (high impedance)
• 4 x Ignition Drives
• 4 x Auxiliary Outputs (PWM capable)
• 2 x Digital Inputs (10kHz capable)
• 2 x Temperature Inputs
• 3 x Analog Inputs (0–5V)
• 2 x Trigger Inputs (Hall, Optical, Reluctor)
• +5V Sensor Power Output

⚙️ Engine Compatibility:

• 1–12 Cylinder Distributed / 2–8 Wasted Spark / 1–4 Direct Spark
• Odd Fire, 2-Stroke, and Rotary Engines supported
• Configurable firing order and TDC points

⛽ Fuel & Ignition Control:

• Up to 440-zone 6D fuel and ignition maps
• Closed Loop Lambda, AFR correction, overrun fuel cut
• Staged and asynchronous injection support
• Individual cylinder fuel and ignition trims
• IAT/ECT/Voltage compensation and more

🏁 Motorsport Features:

• Launch control
• Gear shift control via digital inputs
• Boost control: open loop only
• Idle control: solenoid or ignition-based
• For full motorsport features, consider the G4X StormX

📐 Dimensions & Specifications:

• Dimensions: 130mm (W) x 90mm (L) x 45mm (H)
• Weight: 180g
• Operating Voltage: 8V – 22V
• Internal Temp Range: -10°C to 85°C
• Ambient Temp Range: -30°C to 90°C
• 150MHz processor, 12-bit ADC, 32-bit floating point
• 20000+ RPM capable

📦 What’s Included:

• Link G4X AtomX ECU
• USB tuning cable
• Mounting bracket
• Wiring and installation instructions
• 2 x Large Link Stickers
• 2 x Small Link Stickers

📁 Downloads & Resources:

• Quick Start Guide (PDF)
• Installer I/O Table (PDF)
• Wiring Diagram / Pinout (PDF)

🔗 View all Link ECU Resources