Today, we are very excited to announce the availability of the Accessport for the USDM 2024 Subaru WRX 6MT (including the all new WRX TR) and USDM 2024 Subaru WRX CVT.  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 91 and 93 octane fuel as well as custom tuning capabilities via Accesstuner Pro.  This 2024 WRX support also includes our first release of COBB Custom Features for the all MT VB WRXs – Launch Control and Flat Foot Shifting.

The Accessport and included COBB Off The Shelf Maps for 2024 WRXs are covered by a CARB EO and are able to be sold in all 50 states.  CLICK HERE for more information on our CARB EO’s for Subaru applications.

Accessport Tuning

Introducing the Accessport for your 2024 Subaru WRX.  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.

Included OTS Maps

• Stage0
• Stage1 91
• Stage1 93
• Stage1 Economy Mode
• Vehicle Anti-Theft Mode

COBB Custom Features

All available Off The Shelf Maps for the 2024 WRX MT vehicles have both Launch Control and Flat Foot Shifting enabled.  Both of these features can be configured on the Accessport’s Tune -> Adjustments menu option when using up to date firmware and a map file with the features enabled. Learn more about how to use LC and FFS on your VB WRX in this blog post.

• Launch Control
  • Maximize performance off the line by setting a secondary RPM limit for when the car is stationary and the clutch is engaged.
• Flat Foot Shifting
  • Maintain boost between gears by keeping the accelerator completely depressed while shifting gears.  The FFS RPM Limit will keep RPMS at the desired level and prevent too much boost fall-off.

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 and Stage1 93 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 2024 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.

2024 Subaru WRX CVT - Power Gains

Below you will see power output of both Stage1 91 and Stage1 93 when compared to stock for the 2024 WRX CVT.  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 its 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 VB WRX Map Notes Page.

CVT Drivetrain Loss - Comparison to 6MT

Something we wanted to point out is the difference in measured power at the wheels between SPT and 6MT WRXs.  While the motors are identical as it relates to making power (and are rated as such by Subaru), the CVT driveline is not as efficient at getting power to the ground.  In the graph below we have overlayed stock and stage 1 power figures for both a 6MT and CVT car to help visualize the difference in drivetrain loss.

But wait, there's more!

In rolling out this fix, SUB-006 Accessports are picking up some new features - Engine On Detection, Datalog Compression and On-Accessport File Management!

Update Accessport Manager

We have rolled out an update to Accessport Manager that is REQUIRED in order to utilize some of the Accessport firmware updates outline below.

Accessport Manager Functionality Update

FIRST - To prepare for all the new goodies and take advantage of them as they roll out, download and install the latest installer for your specific operating system:

Windows 8.1, 10, & 11: Download Here
Mac OS X 10.15 & Later: Download Here

Engine On/Off Detection

The Auto On/Off function, or as we call it “Engine Off Detection”, allows the Accessport to determine if the vehicle is running and automatically turn off the device. This is accomplished by reading RPM as well as vehicle voltage. In this modern era of vehicle’s that automatically shut off at stoplights until it’s time to move forward again, just having a singular method RPM would prove to be troublesome.

More on updates to Accessport Auto On/Off functionality can be found here :
https://www.cobbtuning.com/cobb-accessport-auto-on-off-returns/

Datalog Compression

As vehicles and ECUs get newer and more complex, they tend to have more parameters to monitor at a refreshing rate higher than their predecessors which causes the file size of datalogs to swell exponentially. With all things in life, there is obviously a limit when it comes to file storage so to help alleviate and soften that limit, we’ve implemented a new datalog compression feature.

On-Accessport File Management

n order to also assist users, we will also be adding the ability to manage and delete datalogs right from the Accessport itself, no computer required! This update will come as a per platform, per part number updates are pushed out in the coming weeks and months. To use this, simply go into the Troubleshooting menu followed by selecting “File Management” then “Manage Datalogs”. From here you can go through and select which datalogs you want to delete and once you’ve selected all the logs you want to get rid of, press the left/exit button on the Accessport along with a success confirmation message.

Update your Accessport Firmware

Not familiar with the process to update Accessport firmware? No worries, we have a step by step guide here -> How To Update Your Accessport's Firmware