Porsche 981 GT4 / Boxster Spyder Softronic ECU Tune


Unlock extra power and increased response with a Softronic ECU Tune! Safely enhance the enjoyment of your vehicle with no drawbacks. Make the most out of your SOUL performance upgrades through software optimization, and select from a variety of custom features such as neutral free-revving, unlimiting top speed, engine code clearing for track use, and more.

SKU: POR.GT4.ECU Category:




Model  Base BHP   Tuned BHP   Base Torque   Tuned Torque 
3.8L 385 415 310 337



Softronic will send all tuning information / files via email to each customer upon ordering with the end goal being the best possible tune for your Porsche.

Do I have to take my car somewhere to flash it?
No!  You can do it in the comfort of your own garage at your convenience. The included DimSport MyGenius handheld device interfaces with your OBD2 port to deliver the tune to your vehicle. Upon receiving the order, Softronic will ship your tuning device to you within 1-2 days after the order is placed via ground shipping. Please contact us for time sensitive orders. Instructions are sent via email to guide you through the process which summarized is as follows:

  1. Download Dimsport software to your PC
  2. Update software and Dimsport
  3. Connect to car and read ECU file
  4. Send ECU file to Softronic via email
  5. Receive tune file back and then upload to car.

What octane are these tunes compatible with?
Files are tuned to work with street gas ideally between 91 octane to 93 octane. When using race fuel please contact us to ensure tune will maximize its potential.

How do I return my car back to the stock tune?
Your stock file is saved in the DimSport when you pull the file to send to Softronic. It can be flashed back at any time via the same method the ECU tune is flashed to the car.

If I add an exhaust or intake, do I need to reflash my car?
No.  Softronic goes through and tunes each individual table. Unlike others that do a global change to files, Softronic enables the ECU to adapt to basic bolt-on modifications like exhaust, intake, headers, etc. The only time you need to re-reflash your vehicle is when you change fuel components, turbo sizes, or engine internals, etc.


  • Each tune is paired with your specific vehicle and can only be used on one vehicle.
  • Have any questions? Concerns? Contact us at any time to discuss upgrading your vehicle.

ABOUT SOFTRONIC:  Based out of Connecticut, Softronic has been working with Porsche systems for nearly 30 years. From street cars to race cars, Softronic has involved itself in all types of motorsports to stay continuously involved in the industry. Having cutting edge technology not only makes the ECU Tuning process more efficient, it also makes it more accurate. Softronic has been the technical advisor for the Porsche Club of America (PCA) for over 10 years as well. One of the main functions that Softronic serves is data checking of Porsche Motorsports vehicles for race teams. Reading out the binary code and checking data allows Softronic to gain OEM insight into the vehicles brain unit and of course, a fair playing field for race regulations. In the tuner market focusing on street cars, Softronic has gained a very solid name. Softronic exclusively tuned the Porsche Interseries cars, winning Daytona car, World Challenge, Koni Cup and countless others in racing. Some of the fastest cars are tuned in cooperation with Softronic – everything from 1000HP 996 Turbos to daily driven Porsche 987 Cayman.


  1. mgordon18 (Rennlist)

    Installing the DimSport software (needed to interact with the MyGenius) on a Windows computer is the only nuisance in this otherwise easy process. I tried installing the DimSport app on my wife’s laptop and it repeatedly hit an error when updating the MyGenius firmware, crashing the update. But I tried again on my son’s newer computer and it worked flawlessly – so not sure if it was a software issue or a computer issue. Later on, I would have another DimSport crash while uploading the new tune file to the MyGenius, but it succeeded on the 2nd try.

    After the DimSport app is installed and the MyGenius updated, pulling the default ECU file from the car was extremely straightforward. Following the directions and going slowly and deliberately, it took fewer than 5 minutes in the car. Using the DimSport app to then pull the file off the MyGenius onto the computer was also quick and easy. Once you have the file on your computer, you send it over to Scott @ Softronics by just attaching it to an email like any other file attachment. I sent my file on Thursday night. Scott emailed back the new tune file before COB on Friday. Less than 24-hour turnaround!

    BEWARE: If you’re using Gmail, the return email with the tuned file might end up in the TRASH folder. Not the Spam folder – the TRASH folder, where Gmail search won’t find it. I emailed back and forth with Scott 3 times before I realized I’d had it all along but Gmail wanted to automatically delete it. Sorry, Scott!

    I installed the tune this afternoon by reversing the earlier process: Computer to MyGenius via DimSport app (took 2 attempts due to DimSport app crash), and then MyGenius to car. I was a bit worried this time because the instructions say it takes 15-40 minutes and “make sure your car is connected to a battery charger.” I took a chance (since I don’t own a charger and my battery is only about 6 months old) and started the download without a net. It was done in 11 minutes. It was funny to watch the car go through the motions. Dash lights lit up, fans came on, the wipers wiped a single wipe. The upload completed with no issues whatsoever. Afterward, the car started right up. TIP: Before connecting the MyGenius to the OBD port, turn the headlight switch from AUTO to OFF. It will keep the headlights from draining more battery during the upload.

    Now, on to the drive. Once out of my driveway, I immediately noticed more oomph – even with a cold engine (it was 34°F today). The car felt noticeably peppier at low RPM. Scott says the tune doesn’t properly kick in until ~30 miles have been driven, so I took it out on the highway and to some back roads. It was an absolute blast. The car seemed to have a new spirit. The torque boost I used to feel at 4000 was now kicking in around 3000, and I got that little hit of “whoa!” adrenaline I felt when I first drove the car a year ago. It also felt like it was revving up a little faster, but I’m not sure that was actually happening.

    I did about 40 happy miles today testing out the torque curve, letting the car in front get ahead, and then flooring it to catch up. Speed limits were pretty low, so I couldn’t get to the higher revs, but so far I am super happy with both the process and the outcome of the Softronic tune. My GT4 is noticeably stronger. I’m looking forward to Watkins Glen in July to see how it does on the back straight and how it pulls up the hill out of T6. Then I’ll know for sure!

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