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Custom Maps

RACEROM CUSTOM MAPS allow the tuner to modify the behaviour of the factory ECU by inserting additional maps into the ECU's nomal calculations.

For example, these can be for parameters such as ignition timing, fuel, boost and VVT, and inputs and outputs can also be re-purposed to measure custom sensors or solenoids not featured on the standard vehicle.

This facility lets you add custom compensations or even completely replace the calculations that are normally used. For example:

  • Per gear fuel enrichment factor
  • Vehicle speed-based ignition retard
  • Torque reduction for engine oil temperature
  • Throttle reduction for air-flow
  • Torque reduction for wheel-speed differential
  • E85 enrichment factor for injection volume
  • Custom traction control strategies for wheel-speed differential
Ignition compensation for Engine Speed and Manifold Pressure
RaceROM Custom Maps enables you to repurpose an input sensor and actuator output, allowing you to control devices that aren't provided by the car maker ‒ such as a wastegate purge solenoid or intercooler spray pump ‒ or to read data from a custom sensor such as for charge-air temperature, or sensors for ethanol content (Flex-Fuel).

The accompanying map shows a custom ignition compensation for engine speed and manifold pressure.

Entire functions can be created by linking maps together such as:
  • Boost control and wastegate duty feedback by repurposing the Carbon Purge Canister valve to act as a boost control solenoid
  • Enrichment factor for E85 content by connecting a Flex-Fuel sensor in place of the Carbon Purge Canister pressure sensor
Each one of the custom maps can be logged and viewed with the use of the ProECU log viewer.

Special Activation Options for Custom Fail-safe and Startup Maps

Fail-Safe Map
Select the 'Map is initially inactive' option and configure the map to activate in the error condition. Once triggered, the fail-safe map will remain active until the engine is stopped. This could be a map for, say, fuel-pressure drop relative to engine speed, and it could save the engine.

Startup Map
Select the 'Map is initially active' option and configure the map to deactivate when a defined condition is reached. Once it has deactivated the map will not re-activate until the engine is stopped; this could be a cold-start correction that is only active until a certain temperature is reached.
The following video shows how to set up and tune the Custom Maps system.

To view the other available RaceROM Features, please use the 'RaceROM Features' menu to the right 


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