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The Link G4+ Atom II ECU is our entry-level ECU that blows the opposition away - half the size, all...


The Link G4+ Atom II ECU is our entry-level ECU that blows the opposition away - half the size, all the technology! Now with more refinements for the budget conscious. Full configurability, no preset inputs / outputs. Logging, motorsport, and even closed loop fuel if an external device is added. Industry standard waterproof connectors and mounting bracket are supplied with your G4+ Atom II ECU. 

Requires "A" loom.

The G4+ Atom II runs the same microprocessor and firmware as our the G4+ Xtreme. 

Designed and built to be the best "value for money" entry level ECU on the market. 

While the G4+ Atom II is entry level, the following is not compromised: 

The loom (sold separately) is AVSS automotive quality cable 

The same mounting technology as our higher level ECUs 

A fully extruded mounting plate is included 

Mounting hardware is completely hidden for a fully professional installation 

Waterproof automotive plugs 

The same tuning features as our high-end ECUs - tuning is not compromised in this "entry level" ECU 

Full configurability, no preset input/outputs 


Closed loop fuel if external devices added, e.g. WideBand Controller 

Industry standard waterproof connectors, mounting bracket and loom, all supplied with your G4+ Atom II 

Spec overview: 

- Four injection drives 

- Four ignition outputs * 

- Three analog inputs (you choose, oil pressure etc.) 

- Two temperature inputs (usually water and inlet air temperature) 

- Two digital inputs (e.g. vehicle speed and logging switch - you choose) 

- Four auxiliary outputs (e.g. fuel pump, fans, boost control, O2 heater etc.) 

- One, thirty four pin, waterproof connector 

- 5V out 

* unused ignition drives can also be used as auxiliary outputs. 

Other WireIn ECUs: 





Engine Configurations 

2-12 Cylinder Distributed 

2-8 Cylinder Wasted Spark 

2-4 Cylinder Direct Spark 

Odd Fire Engines 

2-Stroke Engines 

Configurable Firing Order 

Configurable TDC Points (for odd fire) 

Fueling Adjustments 

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 

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 

Ignition Adjustments 

Up to 440 Zone Ignition Table with configurable load and RPM centers. Configurable X and Y Axis Parameters 

Crank Dwell Extension 

Maximum Advance 

AFR Table Correction 

Spark Duration 

Beginning / End Injection Definable 

Dwell Time Table. Configurable X and Y Axis Parameters 

Individual Cylinder Trim 

Individual Cylinder Tables 

Multiple Ignition Tables 

Up to 6D Ignition Mapping 

Individual Cylinder Ignition Trim 

IAT Trim 

Voltage Correction 

ECT Trim 

OEM Compatibility 

CDI Compatibility 


Engine Temperature Dependent Progressive Limiting 

Vehicle Speed Limit 

System Voltage Limit 

User Configurable RPM Limit based on external input 


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 

Motor-Sport Features 

None, use the G4 Storm 


Serial RS232 via adapter cable available separately 

Auxiliary Output Options 

Each Output independently configurable 

Unused ignition outputs available as auxiliary outputs 

General Purpose Output 

General Purpose PWM 

Closed Loop Idle Speed Control (Solenoid only) 

Fuel Pump 

Fuel Pump Speed Control 

Engine Fan 

Air Con Clutch 

Air Con Fan 

Intercooler Spray 


Check Engine Light 

Purge Solenoid 

Oxygen Sensor Heater 

Switched Cam Solenoid 


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 


4 High Current Injector Drives 

4 Ignition Channels 

4 Auxiliary Outputs 

2 Digital Inputs 

+5V Out 

2 Temperature Inputs 

3 0-5V Analog Inputs 

2 Trigger Inputs (Reluctor, Optical or Hall Sensors) 

On Board Baro Correction (Real Time) 

Analog Inputs 

Each channel independently configurable with preset or custom calibrations 

Wide-band O2 (from external controller e.g. Innovate LC1) 

Boost Adjust Signal 

Configurable Fault Detection Settings 

Voltage (0-5V) 

Pyro (from external controller) 

Throttle Position 

Pressure (general purpose, fuel, oil) 

Air Flow Meter 

MAP (external) 

Temperature (coolant, IAT, general purpose) 

Narrow Band O2 

Boost Control 

Engine Temp Correction 

IAT Correction 

Multiple Boost Tables 

External Adjustment 

Idle Control 

Reliable and accurate user configurable Closed Loop Control 

Solenoid or Uni-polar 6 terminal stepper only. If 4 wire stepper control is required use the G4+ Storm 

Aircon, Engine Fan or Power Steer idle up 

Open Loop Control Mode for diagnostics 


Internal Temperature Range -10 - 85oC 

Ambient Temperature Range -30 - 90oC 

Voltage 8 - 22V 

Operating Current 200mA 

Electrical protection on all inputs and outputs 


Length: 79 mm 

Width: 126 mm 

Height: 42 mm 

Weight: 360 grams 

Connector : 26 Pin Waterproof Automotive 


Adjust ALL parameters in real time 

Mouse or keyboard operation 


QuickTune - automated fuel self tuning 

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General Delivery Information:

  • Please provide a contact phone number when ordering – in case we or the couriers need to get in touch.
  • All orders placed before 12 Noon will be processed the same day.

All items are dependant on stock availabiltiy:

  • Most parts are dispatched on a 24 – 48 hour basis (if ordered before noon)
  • Most deliveries are made within 24 – 48 hours after dispatch.
  • Some items may be delivered on a later schedule but you will be contacted and informed of an ETA.Specific delivery dates can be offered if required – please provide details in checkout.
  • Large orders may be palatalised but we will do our best to inform you prior to delivery.
  • Deliveries are made between 9am – 6pm. Monday to Friday.

Refusing / cancelling an order:

  • If you refuse an item on arrival due to change of mind and or mistake, you will be charged a fee to have the item returned and or resent - price dependant on product and location.
  • If you cancel an item after it has been dispatched you will be charged a return fee – price dependant on product and location.
  • Deliveries are attempted at least twice, deliveries that fail after this due to no one at the delivery address may incur a fee to re-deliver.

Items arriving Damaged:

  • Unfortunately this is rare but it can happen.
  • If an item arrives at your door please inspect it before signing.
  • If you see any severe damage to the item on arrival please refuse delivery and sign as damaged.
  • If you are unsure about the item please sign as “unchecked” or signed as “damaged”
  • In the unlikely case your item arrives damaged we need to be notified within 24 hours of delivery and require photographic evidence within 2 days of the item arriving. We can then sort out a replacement part to be dispatched. Please email photos to Photos must contain the damaged item and also the damaged to any packaging. This process is so we can follow up claims with the couriers insurance.

Out of Stock:

  • If an item is out of stock, you will be contacted within 24 working hours to be offered either an alternative, full refund or to wait until the product back into stock.

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