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    • GIAC releases Porsche 991.2 9A2 3.0 Carrera turbo ECU flash tuning software - +54 whp, +100 wtq

      Finally! GIAC released their ECU flash tuning software for the 991.2 Carrera 9A2 3.0 engine. The gains are massive. First, let's take into account that the baseline figures are on a Mustang dyno and very similar to what Porscheboost hit on a Mustang dyno with 91 octane pump gas.


      The baseline figure is 347 wheel horsepower and 326 lb-ft of torque at the wheels. With the tune? Horsepower jumps up by 54 at the wheels but the torque gain is just shy of 100 lb-ft at the wheels:


      That is a massive gain down low! The car sees gains throughout the curve as well but that torque hit at 3000 rpm is absurd. In a good way of course.

      Now how does this compare to the GIAC tuned 991.2 Carrera S? Well, only a Dynojet graph was released for the Carrera S without the torque curve included. PorscheBoost e-mailed GIAC for 991.2 Carrera S Mustang figures.

      Additionally, PorscheBoost e-mailed GIAC to try this tune out on the PorscheBoost Project 991.2 Carrera but GIAC has yet to respond.

      What about a race gas tune as well? So far there are only 91 octane numbers being shared.

      It is good to see the 991.2 tuning market getting going.

      This article was originally published in forum thread: GIAC releases Porsche 991.2 9A2 3.0 Carrera turbo ECU flash tuning software - +54 whp, +100 wtq started by Sticky View original post
      Comments 55 Comments
      1. Sticky's Avatar
        Sticky -
        Ugh... just sitting here waiting for GIAC to get back to me. I've e-mailed these people telling them I have a 991.2 and am in the area multiple times.

        Do they not want free press?
      1. quattr0's Avatar
        quattr0 -
        hmm...call them?

        Also, you should include the result was done w after market exhaust in case its not obvious. Still very nice gain on 91 octane!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        Also, you should include the result was done w after market exhaust in case its not obvious.
        Good point, car has an exhaust. People can read the comments to see that.

        Interesting it doesn't show much more than mine even though it has an exhaust.
      1. quattr0's Avatar
        quattr0 -
        That was what i thought as well but didnt want to create more unnecessary noise as different environment and what not. Or, maybe it wasnt good exhaust. See where im going lol
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        That was what i thought as well but didnt want to create more unnecessary noise as different environment and what not. Or, maybe it wasnt good exhaust. See where im going lol
        Yep, it would help if we knew which exhaust it was. Those wheels probably aren't doing the car any favors either.
      1. nbrigdan's Avatar
        nbrigdan -
        Astonishing gains... Makes me think I need a 991.2 in my life Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by nbrigdan Click here to enlarge
        Astonishing gains... Makes me think I need a 991.2 in my life Click here to enlarge
        It's an amazing machine.

        Now.... I want my torque. GIAC where you at? @Seth@GIAC @austin@giac @Thomas@GIAC
      1. Seth@GIAC's Avatar
        Seth@GIAC -
        I sent you an email Click here to enlarge
      1. Seth@GIAC's Avatar
        Seth@GIAC -
        BBI exhaust was on the car when tested.
      1. quattr0's Avatar
        quattr0 -
        Thanks Seth. Will e85 tuning be available shortly? Could i just add a few gallons of e85 on top of 93 with the current release map?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Seth@GIAC Click here to enlarge
        I sent you an email Click here to enlarge
        Thanks. Seems I'm having some mail server issues.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        Thanks Seth. Will e85 tuning be available shortly? Could i just add a few gallons of e85 on top of 93 with the current release map?
        Same question. Interested in E85 and race gas tunes.
      1. Seth@GIAC's Avatar
        Seth@GIAC -
        It is something we can look in to, but it looks like this car is already close to hitting its fueling limits on regular pump gas. We have been blending 30% E85 to a full tank of 91/93 and found it is close to race gas but you need a lot more of it so I would be weary about doing that on a car that is already close to the limit.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Seth@GIAC Click here to enlarge
        but it looks like this car is already close to hitting its fueling limits on regular pump gas.
        Seriously? Hitting fuel system limits on 91 octane? That is depressing.

        Can you do a race gas or E85 tune with supplemental meth injection?
      1. Seth@GIAC's Avatar
        Seth@GIAC -
        It is especially when the power just wanted to keep going up. We may be able to do that like we have in the past but as of right now I don't have any info on how much room we have to play with additional maps within the ECU memory. I do think from the logs that adding race gas to the available option will still net an additional 15/20HP
      1. Stevenh's Avatar
        Stevenh -
        I'm not too surprised Porsche threw an Achilles heel in there to keep enthusiasts from surpassing the S/GTS with basic mods... Seth, does the bottleneck appear to be the pump or injectors?
      1. Surquhar's Avatar
        Surquhar -
        Click here to enlarge Originally Posted by Seth@GIAC Click here to enlarge
        It is something we can look in to, but it looks like this car is already close to hitting its fueling limits on regular pump gas. We have been blending 30% E85 to a full tank of 91/93 and found it is close to race gas but you need a lot more of it so I would be weary about doing that on a car that is already close to the limit.
        Interesting... Are you hitting the ceiling with S as well, or is it just with the base car?
      1. quattr0's Avatar
        quattr0 -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        I'm not too surprised Porsche threw an Achilles heel in there to keep enthusiasts from surpassing the S/GTS with basic mods... Seth, does the bottleneck appear to be the pump or injectors?
        Well, thats a given but 401whp or a little more w some simple weight reduction mods, Im happy. The c2 weight is 3150. Thats lighter than M2!
        @Sticky wheres Steve when we need him? ;-)
      1. Seth@GIAC's Avatar
        Seth@GIAC -
        I think the injectors are great on these cars. I would think it is the pump that will run out of steam first.
      1. Seth@GIAC's Avatar
        Seth@GIAC -
        Click here to enlarge Originally Posted by Surquhar Click here to enlarge
        Interesting... Are you hitting the ceiling with S as well, or is it just with the base car?
        It looks like it but it is still early on. We will have to wait to see what happens when we start getting more bolt ons and taking some other corks out along the way.