Introduction

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Introduction

EcuTek RaceROM is a package of special calibration features that can be installed into the OE ECU of supported vehicles.
Simply open your ECU calibration file using EcuTek software, apply the RaceROM Feature File (Patch) to it, adjust the RaceROM maps as necessary, and then program the calibration file into the vehicle.

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These maps are a boost target limit applied to the maximum achieved boost target which is derived as a function of airflow determination (VW AG EA888 Engine Tuning). It should be noted in some circumstances, the boost limit dictated by these maps may effect the torque achieved by the engine.

Boost can be limited by gear/engine or be globally set to a threshold much lower than what could be achieved by the engine. Example of a typical calibrated table is shown in Fig 3, from Ecutek’s development Golf 7 R with a hybrid turbo, which is set to request a maximum of 530 Nm driver request and as a consequence a maximum of 2900 mbar, limited by the boost table for map switch mode 3.

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OEM boost limits and Charge Pressure setpoints must be lifted to give enough headroom to achieve you flex boost target as well.

Boost Control (Simplified Wastegate Control)

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• Press and Hold “CANCEL” for 3 sec (the map switch should now be displayed on the Tach)

• Press “CANCEL” again to enter RaceROM controller for Torque and use the and buttons to increase and decrease the controller

• Press “CANCEL” again to enter RaceROM controller for Boost and use the and buttons to increase and decrease the controller.

• If you keep pressing “CANCEL” it will keep cycling through the MS mode or RR controller adjustments.

• Press “Set“ to exit.

NOTE: Some Audi’s do not have sports gauges so will not have RaceROM controller displays.

3 Button Stalk

How to map switch using the 3 button stalk

• Slide switch to “CANCEL” and hold for 3 seconds (the tach should mode to your current MS mode)

• Use the and buttons to select different MS modes

• allow the MS mode to time out and tach returns to normal

NOTE: The 3 button stalk cannot map switch when rolling (due to cruise being active) there is also No Set button press to activate custom maps ECU connect could be used instead.

f you wish to change the RaceROM controller for Boost or Power

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These maps emulate the OEM maps which would no longer need to be tuner the RaceROM ignition maps can be live tuned as required.

NOTE: The idle and flap closed maps the OEM maps have not overwritten and will need to be tuned if you wish to change the timing in these low load conditions.

Ignition Timing Mode 1-4 & Lift

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some common values are here

you can also convert a period to a frequency using the below formula

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If you are using the output to control the exhaust flaps with custom maps you must set the duty to match the open and close duty requirements of the valve (10% for closed and 90% for open).NOTE: the Output frequency is adjustable but the OEM signal output voltage is

Driving Solenoids from Exhaust flap Outputs

As previously mentioned the exhaust flap output is a low power PWM device (0-5v and very low current) and can only drive solenoids that require very low power input signals. It appears that most aftermarket solid state relays and solenoids require more current than the ECU can output. With only a simple circuit or driver the output can be used to power WG duty solenoids and injectors like below.

These types of units (High-Current Solid-State Relay or https://www.holley.com/products/nitrous/controllers_and_accessories/parts/15620NOS) can be used if the 5V signal is converted using a transistor and resistor on the switching to ground output.

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Using a Similar set up on the bench (an ignition driver MOSFET) you can also directly drive the solenoid) other protections might be needed in this circuit to protect from solenoid flyback and reverse voltages etc.

Driving a MAC valve with a 5V ignition MOSFET to power the solenoid

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Driving an injector with a 5V ignition MOSFET to power the solenoid

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If the solenoid has a low enough drive threshold and can be directly driven by the ECU is could be set up like below

NOTE: the Output frequency is adjustable but the OEM signal output voltage is 5V and low current capable, The 5V supply will need to be converted using an external controller to a 12V signal. there are commercially available 5V to 12V PWM converter circuits (fast acting SSR 80A DC SSR (50V), or High-Current Solid-State Relay or https://www.holley.com/products/nitrous/controllers_and_accessories/parts/15620NOS50V)) don’t forget back EMF protection diodes.

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Custom maps

Custom Maps are blank map that you can configure the inputs and outputs (as well as activation parmeters) to perform a task that isn’t covered by another hardcoded RaceROM feature. Custom Maps gives tuners the ability to add their own general-purpose maps to control key engine parameters such as ignition, fuelling, boost target, cam angles, wastegate position and more (listed below). They also integrates with the ECU Connect app to give drivers the ability to make adjustments to their tune using the app within the boundaries set by their tuner.

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Note: Some ROMs do not have enough free space for all custom maps, when this occurs maps of each type are dropped out of the listing (i.e. custom map D, H L & Pare removed) but their reference will still be shown, these references as custom map inputs will not have any action or value assigned to them if used so do not select them.

Possible Custom Map Features

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o   Repurposing the Exhaust flap control systems give us 2 Frequency based outputs that can be used to drive a Boost control solenoid at a desired frequency, from there you can simply set a custom map up to drive the output at the required duty.

NOTE: the Output frequency is adjustable but the OEM signal output voltage is 5V and low current capable, The 5V supply will need to be converted using an external controller to a 12V signal. there are commercially available 5V to 12V PWM converter circuits (fast acting SSR 80A DC SSR (50V), or High-Current Solid-State Relay or https://www.holley.com/products/nitrous/controllers_and_accessories/parts/15620NOS) don’t forget back EMF protection diodes .

• Traction control

o   Using the Wheel slip input parameters you can set up a slip based traction control system using custom maps outputs to manage the torque timing and boost as required.

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List of Inputs and outputs to Custom maps

 For more information on how to tune using custom maps please see the link RaceROM Custom Maps Tuning Guide .

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