Supported Vehicles:

• Some model year 2015-2020 WRX 6MT (North American, ADM Spec) vehicles.

*To confirm your model year, you can refer to the tenth value in the VIN number on the vehicle. For model year 2001-2009, the 10th value in the VIN will be the last digit of the model year. For model year 2010-2019, the 10th value in the VIN will be A-K, starting with 2010, ending with 2019.

Current Map Revision:

Accessport Firmware: 

• AP3-SUB-004: 1.7.3.0-19873 or greater
  

• AP3-AU-SUB-004: 1.7.3.0-19115 or greater

Monitoring Boost Levels: 

The best way to determine if you are hitting target boost is to watch the TD Boost Error parameter. This parameter is your target boost (including altitude and temperature compensations) minus your actual boost (negative values mean you are over the target by the amount while positive values mean you are under). Ideally, you want this value to be between 0 and 1.0 at wide-open throttle (WOT), but -1.5 to 1.5 is acceptable assuming that you don't have any significant knock corrections. Overboosting is more likely to occur in higher gears and with colder outside temperatures, so be sure to verify boost levels during these conditions.

High Altitude: 

A quick note for those of you that live at higher altitudes: it is common for turbocharged cars at higher altitudes to run less boost pressure due to lower air pressure and air density. Your turbocharger has to work harder to compress a less dense air mass compared to the same turbocharger at sea level. This must be factored in when determining if your turbocharger is running the proper amount of boost pressure and not being pushed beyond its efficiency range. 
Example: If you live in Denver at 5280 ft. and are trying to run a peak boost pressure of 15 psi, your turbocharger has to work the equivalent of making ~17.5 psi at sea level.
There are barometric compensations within the factory ECU that lower boost targets as you climb in altitude in an effort to keep the turbocharger in its optimal range. The COBB performance maps utilize these compensations and therefore, it is perfectly normal for the final boost target to be lower than what is listed for your map.
 

Flat-Foot Shifting and Launch Control:

Flat-foot shifting and Launch Control have been added to v200 and higher OTS maps (manual transmission only). Older revisions of maps are still supported but will need to be resaved in the latest version of Accesstuner for the features to work.
Launch Control – Allows for setting a specific RPM threshold for launching from a standstill.

• Launch control RPM can be set via the Accessport or the vehicle's cruise control buttons.

• • To set via cruise control: make sure vehicle is stationary, clutch pedal is in, cruise control is off and rev engine to desired launch RPM (minimum 2500) and then press and release the cruise SET button. This launch RPM will be retained until the next map reflash, ECU reset, battery disconnect, or Accessport adjustment. Hitting the cruise CANCEL button when the vehicle is stationary, the clutch pedal is in, and cruise control is off will clear the launch RPM.

• • To set via Accessport, connect the Accessport to the car, turn the ignition ON (or start engine), and adjust via the Accessport's Tune -> Adjustments -> Launch Control menu. This launch RPM will be retained until the next map reflash, ECU reset, battery disconnect, or cruise control adjustment. If this menu is not found, update the Accessport to the latest firmware version.

• The default launch RPM for the OTS maps is 8000 RPM which effectively disables the feature until it is adjusted via cruise control buttons or Accessport.

Flat-Foot Shifting

• Adjustable via the Accessport

• • To set via Accessport, connect the Accessport to the car, turn the ignition ON (or start engine), and adjust via the Accessport's Tune -> Adjustments -> Flat-Foot Shift menu. This flat-foot shift RPM will be retained until the next map reflash, ECU reset, or battery disconnect. If this menu is not found, update the Accessport to the latest firmware version.

• The default flat-foot shift RPM for the OTS maps is 8000 RPM which effectively disables the feature until it is adjusted via the Accessport.

WARNING: Using the launch control and/or flat-foot shift feature puts more stress on the transmission, drivetrain, engine and other components and can result in increased wear of any of these components as well as the potential for catastrophic failure. The more aggressive driving characteristics that are possible with the launch control and/or flat-foot shift feature could also potentially result in an unexpected loss of vehicle control. This feature should only be used in controlled off-road racing conditions where all parties understand the risks involved.

Boost Control System Modification: 
 

• Full Walkthrough: VA WRX Wastegate Secondary Restrictor Pill Removal

Due to the boost spiking that is common on the 2015+ WRX (that becomes even worse with exhaust upgrades), our Stage2 maps require the deletion of the restrictor pill. If this is not done, underboosting will result. The hose and pill in question are shown below. The entire hose can be replaced with a new section of 6mm or 1/4" silicone vacuum hose (clamp each end securely!) and the factory hose can be set aside. Alternately, you may remove the pill from the OEM hose, set the pill aside and reinstall the hose. 

Revision Notes: 

v351-

• Improved high Load driveability.

v350-

• Utilized new CCF2 ROM family for improved driveability.  Among those changes.
  • Improved closed-loop fueling and learning
  • IAT boost target compensation.

v303 –

• 2018 ADM WRX: Fixed bug where the "Intake Temperature Pre-Turbo" monitor could sometimes show a value of -58F for a brief period of time after engine start. ECU did not use the erroneous value so this is a monitor issue only.

• Added 2019 ADM WRX support.

v302 –

• 2017 USDM WRX CVT/MT: Fixed an issue where real-time tuning and real-time map switching was disabled for the "MAF Calibration" table which caused the ECU to always use the reflashed values only for this table. 

  • Note: Please REFLASH a v302 map to address this.
    

v301 –

• Fixed bugs associated with v300 maps preventing real-time and launch control feature changes from working.

• Addressed issue causing check engine light from being thrown for Stage2 maps

v300 –

• Supports the latest Subaru ECU revision. Merged Subaru calibration for the latest injector timing changes.

v201 –

• Fixed bug causing Realtime map switching to not work.

• Added 2016 USDM WRX 6MT support.

• Added COBB BigSF Intake support.

v200 –

• Realtime tuning/map change feature added to v200 and later OTS maps (also requires latest Accessport firmware update to expose real-time map change function).

• Launch control (AP and cruise control adjustable) feature added to v200 and later OTS maps (also requires latest Accessport firmware update to expose launch RPM adjustment menu).

• Flat foot shifting (AP adjustable) feature added to v200 and later OTS maps (also requires the latest Accessport firmware update to expose flat-foot shift RPM adjustment menu).

• Merged Subaru calibration update for injector timing and other changes.

• Includes Subaru pre-ignition updates.

v115 –

• Renamed Stage1+TBE maps to Stage2

• Revised IAT vs. WGDC compensation to reduce underboosting between 32 F / 0 C and -40 F / -40 C

• Disabled Global A/F Learning #1 adjustment

• Slight revision to reduce DAM adjustment sensitivity at low loads

• Corrected issue with OL Enrichment vs. DAM fueling adjustment table

v114 –

• Addresses an infrequent brief interruption of torque/power delivery introduced in the v113 maps.

v113 –

• Adds support for newest factory ECU/ROM update

• Reduced "rev hang" behavior when changing gears

• Optimized higher load ignition timing

• Revised how IAT vs. Ignition Timing compensations are applied at low load and RPM

• Changed long-term fuel trim behaviors at higher load values

• Improved AVCS and Requested Torque settings to improve power past 6000 RPM

• Revised Boost Target and WGDC vs. Baro. Comps to increase boost at high elevations

• Altered Per-Gear Ignition Timing compensations for 4/5/6th gears at high RPM for better resistance to detonation

• Slightly richer target AFR at high load and RPM

v109 –

• Revised low load/RPM timing to reduce knock corrections

• Smoothed Boost vs. IAT compensations for more predictable boost targeting

• Reduced Boost Target at higher RPM to raise knock threshold

• Adjusted Boost Target and WGDC Compensations for high elevations to address underboosting

• Added "High Waste Gate" secondary option mapping for cars experiencing persistent underboosting conditions

• Revised throttle mapping to increase sensitivity at partial accelerator pedal positions based on feedback from Airboy and others

• Richer target AFR at high load for increased detonation resistance

v105 –

• Revised ignition timing, primary fueling, camshaft timing, closed / open loop transition thresholds and boost levels for performance and safety.

• Optimized throttle mapping for improved take-off and more linear response across accelerator pedal range.

• Factory fueling and timing strategies streamlined for ease-of-calibration and consistency following a key-off and restart sequence.

• Per-Gear Timing Compensations revised for safety and enabled for 6th gear (OEM logic only allows for compensating gears 1-5).