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Subaru Impreza STi A4RG060Q Boost+WG switch,Valet,LC,Rev-protect

Subaru Impreza STi A4RG060Q Boost+WG switch,Valet,LC,Rev-protect

Product Information

Read the disclaimer

This patch is applicable only to a ROM image downloaded from an EDM Subaru Impreza STi with calibration id A4RG060Q. The patch will add the following features/enhancements:

  • On the fly switchable boost and wastegate maps
  • On the fly switchable Valet mode
  • Launch control
  • Rev-protect

Patch details and installation instructions

Multi function patch

This patch offers many and unique functions. The priority of the executed functions affecting the rev limiter is the following:

  1. Rev-protect
  2. Valet mode
  3. Launch control

Rev-protect

The purpose of this feature is to restrict the maximum RPM limit the engine can reach depending on the coolant temperature.

This is useful to assist you in avoiding racing the engine when it is not properly warmed up.

Set your desired value of Rev-protect RPM delta and coolant temp threshold in your ROM

IMPORTANT NOTICE: Rev-protect RPM Delta is an offset to the normal rev limiter

To disable this function set the parameters as follows:

  • Rev-protect RPM delta = 0
  • Rev-protect coolant temp threshold = -40

Valet mode

The purpose of this feature is to restrict the maximum RPM limit the engine can reach.

This is useful in various situations e.g. where you let someone else drive your car.

Set your desired value of Valet RPM delta in your ROM

IMPORTANT NOTICE: Valet RPM Delta is an offset to the normal rev limiter

Effectively rev limit = rev limit - Valet RPM delta

  • the higher the Valet RPM delta value the lower the actual rev limit becomes
  • the lower the Valet RPM delta value the higher the rev limit becomes.

To toggle the valet mode at anytime while stationary, perform the following sequence:

  1. Make sure the engine is OFF, turn the key to the on/ign position, DO NOT START THE CAR
  2. Set the rear defog switch to OFF
  3. Fully HOLD down the accelerator pedal
  4. Set the rear defog switch to ON
  5. Release accelerator pedal
  6. Set the rear defog swtich to OFF
  7. Valet mode toggle is complete

Launch control

The purpose of this feature is to allow you to hold your foot planted to the throttle while stationary.

Forcing an RPM delta (offset to real rev limit), allows the car to hold a user desired rev limit and launch with as much less wheelspin as possible when releasing the clutch.

Of course this RPM limit must be disabled after the car has reached a specified speed threshold.

Effectively rev limit = rev limit - Valet RPM delta

  • the higher the Valet RPM delta value the lower the actual rev limit becomes
  • the lower the Valet RPM delta value the higher the rev limit becomes.

Set your desired value of LC RPM delta in your ROM

IMPORTANT NOTICE: LC RPM Delta is an offset to the normal rev limiter

To disable this function set the parameters as follows:

  • LC RPM delta = 0
  • LC disable speed threshold (KMH or MPH) = 0

Lets see some examples and interesting extra features

Launch control enabled, from stationary to 10km/h

  • Rev limit is 7200rpm
  • LC speed threshold=10km/h
  • LC RPM delta=1700rpm

Rev limit will be 5500rpm (7200-1700) till vehicle reaches 10km/h

Valet mode

  • Rev limit is 7200rpm
  • LC speed threshold=255km/h
  • LC RPM delta=3200rpm

Rev limit will be pegged to 4000rpm (7200-3200)

Normal operation (feature disabled)

  • Rev limit is 7200rpm
  • LC speed threshold=0km/h
  • LC RPM delta=0rpm

No change to rev limit (7200-0)

Stationary rev limit

  • Rev limit is 7200rpm
  • LC speed threshold=0km/h
  • LC RPM delta=3200rpm

Rev limit will be 4000rpm only when stationary (7200-3200)

Wastegate + boost map switching

The purpose of this feature is to allow you to switch between two different boost and wastegate maps

These are the tuneable switchable maps (Primary/Alternate)

  1. Primary target boost (BAR/PSI). This is the map that used by default when your first flash it to your car or switch from alternate or anytime you perform a RESET.
  2. Alternate target boost (BAR/PSI). This is the alternate target boost map used when you switch from primary
  3. Primary max wastegate duty. This is the map that used by default when your first flash it to your car or switch from alternate or anytime you perform a RESET.
  4. Alternate max wastegate duty. This is the alternate max wastegate duty map used when you switch from primary

To switch maps at anytime while driving perform the following sequence:

  1. While driving, set the rear defog switch to OFF
  2. Select 4th or 5th gear, reduce engine RPMs such as to avoid fast turbo spool up
  3. While fully HOLDING down the accelerator pedal, set the rear defog switch to ON
  4. Map swithing is complete

IMPORTANT NOTICE: BE EXTRA CAREFUL when switching maps, as switching is almost instant

Price: $90.00


Product Code: MULTI-P1_A4RG060Q
 
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