Subaru’s VB WRX has proven to be one of the aftermarket’s favorites over the past year, mainly due the power potential of its 2.4L DIT power plant.  With simple bolt-on upgrades and tuning, we are seeing power output that would have required a laundry list of upgrades for previous generation WRXs, and even STIs.

Today, we are very excited to announce the availability of the Accessport and Accesstuner Pro for the ADM 2023 Subaru WRX 6MT.  This support will consist of the Accessport with its core functionality – including gauge monitoring and data logging, performance metrics, trouble code read and reset, and Stage 1 Off The Shelf (OTS) Maps for 95 and 98 RON fuel.  Our Accesstuner Pro tuning software for Authorized Protuners is also available for those who wish to have their car custom tuned by one of our Subaru Protuners.

Support for 2023 WRX trims, including the GT, equipped with Subaru’s new CVT transmission dubbed “SPT” will require additional efforts and will hopefully come in the future.  While the ECU can easily be supported in those cars, increasing power has proven to not pair well with the factory transmission logic/tuning.

Accessport Tuning

Introducing the Accessport for your 2023 Subaru WRX 6MT.  The Accessport is the world’s best selling tuning solution for Subaru and we are so excited to kick off tuning for Subaru’s best WRX to date.  The Accessport will currently ship with two performance maps for either 91 or 93 octane fuel, a Stage0 map which mimics factory calibration data, an economy map, and anti-theft map.  Flash time for all maps is under 6 minutes.

Included OTS Maps

• Stage0
• Stage1 91 (95 RON)
• Stage1 93 (98 RON)
• Stage1 Economy Mode
• Vehicle Anti-Theft Mode

Engine Safety

Beyond increasing power, we have also implemented a couple of safety measures utilizing factory logic and tables in an effort to maintain or even increase reliability.

In situations where Oil Temperature is above 250* F, maximum power will be reduced to attempt to mitigate engine damage from excessively-high oil temperatures. Power will be restored once Oil Temperature falls to 248* F or below. This level of heat should not be a concern during normal street operation but may come into play during extremely high ambient temperature operation or if using the vehicle in a motorsports environment.

The factory intake temp vs. boost compensation is also fairly conservative on the cold side (IE, removes a lot of boost as intake temperature decreases) and fairly aggressive on the warm side (IE, does not remove much boost as intake temperature increases).  Our Stage 1 performance calibrations will not be as active in cold scenarios, but more active as heat increases.  This should help make the car feel better in “boost weather” as boost targets would not decrease as much as it would stock when temps drop.  On the flip, with a slightly more aggressive approach, we hope to mitigate risk when heat is at its worst.

Power Gains

Enough about that, on to the numbers!  Below you will see power output of both Stage1 91 (95 RON) and Stage1 93 (98 RON) when compared to stock.  Increased power under the curve is substantial for both 91 and 93 octane variants of the Stage 1 calibration.   Peak increases are found where the motor makes it’s maximum output for torque or horsepower.  Max increases represent the single largest delta between stock and tuned. Average increases  represent the overall added power under the curve.

For additional information, visit the 2023 Subaru WRX Map Notes Page.

This is a graph we haven’t displayed much in the past, but is interesting for perspective.  In hopes to make higher fuel economy easier to achieve, the Economy Mode calibration minimizes boost targets and performance.  This does actually result in the car making slightly less power and torque than stock across the board, however the curve is extremely smooth.

Accesstuner Pro for 2023 WRX 6MT

Custom tuning for the 2023 Subaru WRX is here!  For those interested in modifying their cars beyond of the coverage of our Off The Shelf Maps, custom tuning is required.  The available tables allow COBB Protuners the ability to create a custom calibration specific to each car and also enables them to support emissions compliant bolt-on upgrades.

Find your nearest COBB Protuner

Additional Modifications

Looking for more than just increased power output for your 2023 Subaru WRX?  We already offer a host of parts to improve shifter feel, reduce drivetrain slop, and dress-up the engine bay.

COBB Edition Wheels by Titan7