Porsche 991.2 Power Gains with Accessport Tuning

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After more than two years since we first took delivery of our 991.2 Carrera S and dove in head-first, we can finally see the end of the tunnel.  Not just the spec of light coming from it, actual daylight.  And it is glorious.  With the release of the COBB Accessport for Porsche’s 991.2 Carrera and Turbo/Turbo S imminent, we wanted to share some exciting data from our development period.  Most notably, how much power these cars make! Below we’ll give a brief synopsis of the power gains 991.2 owners can expect when they choose the COBB Accessport as the tuning solution.


991.2 911 Carrera

For the first time ever, the base 911 Carrera comes equipped with turbochargers.  While purists may scoff at the idea of a boosted powerplant, the fact of the matter is that the cars are producing more power, more efficiently, than ever before.  The Carrera, S, and GTS share a 3.0L engine and take advantage of varying turbocharger size, boost pressure, and other tuning changes to maintain the hierarchical power difference between tiers.  The base Carrera utilizes turbochargers with a 49mm compressor producing around 13 psi of boost to pump out baseline numbers of 367 HP and 336 TQ measured at the wheels.  Our Stage 1 calibration file increases power to 435 HP and 460 TQ when utilizing 93 octane fuel.

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991.2 911 Carrera S

Porsche 911 991.2 2017 Keith Treder-9

With the Carrera S having slightly larger turbochargers (51mm compressor) and utilizing 16 psi of boost pressure from the factory, we saw baseline power figures of 403 HP and 376 TQ measured at the wheels.  The COBB Stage 1 map offers additional power across the board, as indicated in the following dyno chart.  This calibration is intended to be used on an otherwise completely stock car, requiring no mechanical modifications.  On 93 octane, we saw maximum gains of over 30% in some areas.  Peak power numbers are increased to 452 HP and 483 TQ at the wheels.

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991.2 911 Carrera GTS

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The Carrera GTS offers even larger turbochargers than the Carrera S, the compressor measurements come in at 55mm.  With those turbochargers producing right around 18 psi of boost pressure we recorded baseline numbers of 423 HP and 409 TQ measured at the wheels.  A simple Stage 1 calibration with 93 octane fuel in the tank took the GTS to an astonishing 506 HP and 488 TQ measured at the wheels, peak gains of over 19%!

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991.2 911 Turbo / Turbo S

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This is where the fun really starts.  The 991.2 911 Turbo’s 3.8L powerplant with VTG turbochargers is rated at 540 HP, and the Turbo S, with it’s larger turbochargers, at 580HP.  We recorded 493 HP and 485 TQ at the Turbo’s wheels in true factory-form.  The final version of our Stage 1 Off The Shelf Map increases that to 538 HP and 591 TQ to the wheels.

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The Turbo S managed to spin the dyno to the tune of 524 HP and 543 TQ at the wheels.  After some calibration magic, the Turbo S was scorching the dyno rollers to the tune of 594 HP and 639 TQ measured at the wheels.

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Stay Tuned!

We are now just weeks away from the official release of the COBB Accessports for 991.2 and 718 vehicles and will be sharing more information leading up to the highly-anticipated date!


COMMENTS
Pete Flevaris on June 8, 2018 says:

Pure monsters!!! Nice work
Any idea what the 91 octane numbers are for the base?

Reply
    Adam Hill
    Adam Hill on June 11, 2018 says:

    Here ya go!

    Reply
      Pete Flevaris on June 13, 2018 says:

      Thank you Adam
      Looks like the 91 map retains the smooth curve shape of the 93. Roughly how much % increase in peak hp and torque over the stock tune for the 91 ots map? Im assuming this will be available at final release as well.

      Reply
        Marshall
        Marshall on June 14, 2018 says:

        We saw results of 431 HP and 448 TQ to the wheels on the Stage 1 91 octane map. That makes for a peak HP gain of 17% and maximum gains of 33% HP and TQ over stock. Still quite impressive even on the lesser quality fuel – Marshall@COBB

        Reply
          Ninous Makou on June 14, 2018 says:

          Can you post some stage 2 dyno sheets and also a stage 1 91 octane for the GTS? Thanks.

          Adam Hill
          Adam Hill on June 14, 2018 says:

          Here is the 91 octane dyno chart for the GTS. We can’t report on anything beyond stage1 yet. Stay in touch for more details soon.
          991.2 GTS Stage1 91

Dr Nirmal Krishnan on June 19, 2018 says:

So would you be releasing stage 2 maps too at the beginning as my Carrera S has a full Kline inconel exhaust with catless pipes and would like to know the gains .. also would it be possible to use gts turbos on Carrera S with your software ? That would be epic

Reply
    Marshall
    Marshall on June 19, 2018 says:

    Stage 2 Maps will not officially be included with the initial release. It’s something that we’re currently working on and hope to have released soon!
    Marshall@COBB

    Reply
luiz carvalho on August 19, 2018 says:

Marshall said “We saw results of 431 HP and 448 TQ to the wheels on the Stage 1 91 octane map. ”

What’s the gain numbers for a Stage 1 93 map for a 991.2 base ?

Reply
    Marshall
    Marshall on August 20, 2018 says:

    Luiz, we generally see an additional 5-10% gain going from 91 octane to 93 octane and tuning for the change. Our Stage 1 93 map nets peak gains of +18.5% HP and +36.9% TQ to the wheels and maximum gains of +39.6% HPand 39.8% TQ over stock. You can find the dyno charts on our Map Notes Page linked HERE.

    Marshall@COBB

    Reply
Tom Arter on December 4, 2018 says:

Any update as to when stage 2 maps for the 991.2 GTS will be available?

Reply
    Adam Hill
    Adam Hill on December 5, 2018 says:

    No specific date yet, but we’ve got a car in the shop right now. So it’s still a top priority. Hang in there. :)
    Adam@COBB

    Reply
Jean-Claude Lefebvre on December 12, 2018 says:

Christmas gift this year… Stage 2 maps?

Reply
    Marshall
    Marshall on December 13, 2018 says:

    Jean-Claude, I wish I had better news on the Stage 2 front. We’re definitely going to push into 2019 before those are made available. Getting our software ready for tuning beyond Stage 1 has taken a bit longer than expected and aligning resources (finding a time where a calibrator, our dyno, and vehicle are all available at the same exact time) has been nearly impossible. I assure you we are working on them and they will be available in the future, unfortunately, I just don’t have the ability to provide an accurate ETA at this point.

    Marshall@COBB

    Reply