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Atom II

£777.60 inc. VAT

The Link G4+ Atom II

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


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
Logging Analysis
Diagnostic Information
Built In Help
Definable Screen Layouts
View over 300 possible runtime parameters

Package Contents
G4+ Atom ECU
Mounting Bracket
Wiring and Installation Instructions
2 large Link Stickers
2 small Link Stickers

Manufacturing Standard
ISO 13485

Additional Accessories
(Purchased Separately)
– Terminal and plug kit – not recommended unless you have access to the correct AMP crimper
– 400mm loom
– 2.5m loom
– 5m loom (ideal for boat installations)

Intake Air Temperature Sensor
– 3/8 NPT (Aluminium or Steel Mounting Bosses to suit)
– Bosch push in(Aluminium or Steel Mounting Bosses to suit)

Throttle Position Sensor
3 Channel Link Igniter
Wideband O2 Controller & Sensor
Injector Ballast Resistor Packs
1 x 1R (6 x <6R injectors)
2 x 1R (12 x <6R injectors)
4 x 4R7 (4 x <6R injectors)
6 x 4R7 (6 x <6R injectors)


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