Stage 1 991.2 GT2 RS and Stage 2 Porsche 991.2 Turbo, Turbo S


GT2 RS Accessport Support

Nearly two months ago, we teased Porsche enthusiasts with 991.2 GT2RS tuning results.  Today, we are excited to announce the availability of Accessport tuning support for Porsche’s most powerful 911 ever.

accessport_v3_main Accessport for Porsche 911 991.2 Turbo / Turbo S / GT2RS

The Accessport V3 is the world’s best selling, most flexible ECU upgrade solution for Porsche. Unlock power hidden within the vehicle by replacing conservative factory settings with more aggressive calibrations. Upgrade forever with off-the-shelf (OTS) calibrations for most bolt-on modifications. It’s the last engine management solution you’ll ever need.

Included Off The Shelf Maps are intended to be used on otherwise stock vehicles. The dyno graphs below show gains across the board for both 91 and 93 octane versions of our Stage 1 OTS Map.  On 91 octane fuel, we saw maximum gains of 15% HP and TQ and peak gains of 12% HP and 8% TQ to the wheels over stock.  Using 93 octane fuel, users can expect to see an additional 3% maximum gain, netting maximum increases of over 18% HP and TQ and peak gains of 14% HP and TQ to the wheels over the stock calibration.

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991.2 Turbo and Turbo S Stage 2

Also new for the Porsche 991.2 platform are Stage2 Off The Shelf Maps for supported 911 Turbo and Turbo S models.  These maps are intended to be used on cars with upgraded exhaust systems containing high-flow catalytic converters and are otherwise stock.  The dyno charts below represent horsepower and torque gains over stock for the Turbo and Turbo S on both 91 and 93 octane fuel.

991.2 Turbo Stage 2 Power Gains

Base 911 Turbos see maximum gains of 34% HP and TQ to the wheels with peak gains of 12% HP and 28% TQ to the wheels when using 91 octane fuel.  With 93 octane in the tank, maximum gains jump to 38% HP and TQ to the wheels and peak gains increase to 18% HP and 32% TQ to the wheels.

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991.2 Turbo S Stage 2 Power Gains

Since the Turbo S is equipped with slightly larger turbochargers, power output at Stage 2 is even more impressive! Maximum gains are 24% HP and TQ to the wheels and peak gains are 15% HP and 17% TQ to the wheels on 91 octane fuel.  Cars using 93 octane fuel will enjoy maximum gains of 27% HP and TQ to the wheels and peak gains of 19% HP and 26% TQ to the wheels.

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More to come for 991.2 and 718 vehicles soon!

Stay Tuned.

Ninous Makou on October 22, 2018 says:

Hey there! When should we be expecting the stage 2 release on the 991.2 Carrera models?

Are only cat deletes required? Would other supporting mods such as headers/filter/intercoolers help?

    Marshall on October 22, 2018 says:

    Hey there! We do not have an ETA for 991.2 Carrera Stage 2 maps. Once released, they will require upgraded high flow catalytic converters. We are also investigating some intercooler and turbocharger upgrades for those wanting to go beyond the Stage 2 level.


      Jean-Claude Lefebvre on October 23, 2018 says:

      No ETA? So dangling the carrot, are you in testing phase at least?

Dustin Gage on October 24, 2018 says:

Do we have any ETA on 991.2 and 718 ProTuner release?

    Adam Hill
    Adam Hill on October 25, 2018 says:

    Hi Dustin,

    Not specific ETA yet, but those ATP updates are being worked on currently.

David Chen on November 4, 2018 says:

Hmmm will there be a 971 4S ProTuner made? There’s not a lot of ECU/mapping that can be done to my Panamera 4S Sport Turismo…

    Adam Hill
    Adam Hill on November 7, 2018 says:

    Hi David,

    The 971 platform is something we have an eye on but it will probably be quite a while before we can determine specifically when or if we will be adding support for them. So it’s definitely a project we are interested in but nothing to report yet.

Ninous Makou on November 7, 2018 says:

Are we any closer to the Carrera stage 2 maps?

    Adam Hill
    Adam Hill on November 7, 2018 says:

    We’re still working on it, but nothing new to report since the last reply. We’ll be sure to make announcements once things are ready for release.

      Jean-Claude Lefebvre on January 14, 2019 says:

      Do you have news, updates, development progress on the Stage-2 maps for the Carrera, S, GTS?

        Marshall on January 15, 2019 says:

        Hey Jean-Claude,

        I’ll be publishing an article announcing the availability of these maps here in the next day or two. For now, if you simply update the firmware on your Accessport I believe you’ll find a nice surprise. :)


          Jean-Claude Lefebvre on January 15, 2019 says:

          W00t!!! thank you thank you! Updating as we speak, will report through email.

          Jean-Claude Lefebvre on January 22, 2019 says:

          Ok 100 miles later after the Stage-2 map (93 octane) on the 991.2 C2S. All I have to say is wow what an update you delivered. Not only in pure power and torque over the Stage-1 but the tune is much much refined, less twitchy and power delivery is even more linear. I never thought I would see so much difference between stage 1 and 2, but there is a big one. Congratulation COBB