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    • Preliminary BoostAddict.com 991.2 9A2 3.0 Stage 1 turbo upgrade results on the 2017 Carrera

      As you know the PorscheBoost.com Project 991.2 Carrera is undergoing development for the BoostAddict.com Stage 1 turbocharger upgrade. This upgrade applies to all 2017 on Porsche 991.2 3.0 models including the Carrera, S, GTS, and T.


      Where we left of was with the car getting a race gas tune on the factory turbochargers. This resulted in 455 horsepower to the wheels with the turbos absolutely maxed out.

      Just bolting on the BoostAddict.com Stage 1 upgrade without changing anything in the tune resulted in a gain of 10+ whp:


      Right off the bat you see an efficiency gain meaning these turbos are doing less work to achieve even more power.

      Now, tuning is a process. This is to show you the effort being put in to tune these turbos as well as their capability. Not to mention, the skill of the tuner. Nobody else in the world has tuned upgraded turbos on E85 or explored the limits of the 991.2 9A2B6 engine.

      After some work Gintani achieved 511 horsepower to the wheels with a much stronger top end curve:


      How much power is that in context? Well, a 991.2 Turbo S puts down 480 whp on a Mustang stock. That is 30 more horsepower at the wheels than the top of the line 911 Turbo.

      We were not finished there. Gintani kept tuning exploring the limit of the fuel system which had no issue on 100% E85. We found a bottleneck but it was not the fuel system. It was the spark plugs.

      Gintani hit 540 whp but spark would break up toward redline. They dialed it back a bit settling for 530 whp where the car is happy:


      We still have more turbo left as this was achieved at 24 psi but from this point forward one has to question what the internals can take as well as what the fuel system has left in it. Keep in mind this is 50 more horsepower at the wheels than a 991.2 Turbo S or in other words an easy 650+ horsepower at the crank.

      As we do not have a spark plug solution yet (we are exploring all options) this is where we are comfortable leaving it on race gas/ethanol.

      Pump gas tuning will be wrapped up next week and the numbers posted with an official release. Expect something well into the 4XX range.

      Methanol testing will also take place with 91 octane pump fuel. Not only to see how much more power can be extracted on pump fuel but for added safety.

      Those interested in the upgrade should contact me either through e-mail at admin@boostaddict.com or PM's here to reserve a spot. The first two spots are already claimed.

      The turbo upgrade will be available without tuning for those who want to tune on their own. For everyone else, tuning will be complete and ready to go on multiple fuels along with methanol.

      Now if we could just find some spark plugs that work...

      This article was originally published in forum thread: Preliminary BoostAddict.com 991.2 9A2 3.0 Stage 1 turbo upgrade results on the 2017 Carrera started by Sticky View original post
      Comments 42 Comments
      1. 3DMetal's Avatar
        3DMetal -
        At no point is it making the same or less than stock power / Tq in the graph. From 2500-> + its a monster.
        Can't wait to hear your feed back on drive-ability.

        Felt much better than stock on the test car with stock tune.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 3DMetal Click here to enlarge
        Felt much better than stock on the test car with stock tune.
        I believe it.

        Looks like no spool sacrifice either.
      1. 3DMetal's Avatar
        3DMetal -
        I still can't get over how awesome that HP curve looks! Vertical to 7000. It's going to feel linear, not like a high boosted small displacement engine. Encouraging to revving it out all the way to redline to shift. Going to be a blast to drive.
      1. Bowser330's Avatar
        Bowser330 -
        Porsche is about quality man, they very quietly beat the pants off of their luxury brand rivals.

        https://jalopnik.com/how-the-hell-ar...ble-1709270257

        I think the 9A2 engine will be just fine with 24psi. The BMW 3.0TT S55 engine is boosted to 24psi with Jb4 and we dont see any major engine issues, like rods bending, and there are A LOT of jb4's out there being used.

        You wrote a previous article about how BMW M motors always seem to have an issue, and yet with JB4 and 24psi on the stock and Pure turbos, you don't see the engines having any significant issues.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        You wrote a previous article about how BMW M motors always seem to have an issue, and yet with JB4 and 24psi on the stock and Pure turbos, you don't see the engines having any significant issues.
        Right but this is Mustang horsepower... 600 whp on this is over 700 Dynojet and this is uncharted territory.

        I believe the motor will be strong but we don't know if Porsche skimped anywhere or beefed it up so it will last a while.

        They also probably don't want people doing what I'm doing.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 3DMetal Click here to enlarge
        I still can't get over how awesome that HP curve looks! Vertical to 7000. It's going to feel linear, not like a high boosted small displacement engine. Encouraging to revving it out all the way to redline to shift. Going to be a blast to drive.
        Exactly. Much more top end which is exactly what it needs.

        Was not a fan of the stock torque curve dropping off. No point even revving it out.

        Now that redline will shine.
      1. BlackJetE90OC's Avatar
        BlackJetE90OC -
        Run this thing on dynojet just for the hell of it.
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Right but this is Mustang horsepower... 600 whp on this is over 700 Dynojet and this is uncharted territory.

        I believe the motor will be strong but we don't know if Porsche skimped anywhere or beefed it up so it will last a while.

        They also probably don't want people doing what I'm doing.
        I don't doubt that the Mustang Gintani uses reads less than Terry's dynojet at Specialty-Z but I am very curious to see the transfer function between them, is it 10% less, or is it as much as 15% less? big difference when you are getting into this much horsepower.

        If your current e85 tune 527whp (mustang) reads 10% less, then the Dynojet is reading approx. 586whp

        630whp (mustang) would then mean 700whp (Dynojet)

        630whp (mustang) is +100whp than where you are now, do you think the turbos you have can efficiently produce that much more? The curve does look very good, maybe it could.
      1. quattr0's Avatar
        quattr0 -
        Great result! When will you get the car back? Two weeks? Wanted to see how the experience is like...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by BlackJetE90OC Click here to enlarge
        Run this thing on dynojet just for the hell of it.
        I will eventually. Weistec's 4WD dyno is available when I need it.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        30whp (mustang) is +100whp than where you are now, do you think the turbos you have can efficiently produce that much more?
        These turbos will support over 30 psi I'm told.

        We're not even near pushing them. They're just starting into the zone.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        Great result! When will you get the car back? Two weeks? Wanted to see how the experience is like...
        I think 91 and meth tuning will be done next week.

        The thing is, logs and feedback from the work have been used to help develop the handheld.

        So, I'll probably just get the M3 back first and wait to get the 911 back with a handheld for 91 + meth and E85 tunes.

        If I had E85 local I wouldn't care but I don't. I just want the freedom of the handheld.
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I think 91 and meth tuning will be done next week.

        The thing is, logs and feedback from the work have been used to help develop the handheld.

        So, I'll probably just get the M3 back first and wait to get the 911 back with a handheld for 91 + meth and E85 tunes.

        If I had E85 local I wouldn't care but I don't. I just want the freedom of the handheld.
        most of us in socal dont live near an e85 station so we understand and thank you for that!
      1. quattr0's Avatar
        quattr0 -
        I'm still shocked that you could run 100% corn without any add-on and making good power. Wonder if that will hurt anything long run....
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by quattr0 Click here to enlarge
        I'm still shocked that you could run 100% corn without any add-on and making good power. Wonder if that will hurt anything long run....
        The fuel system had more in it. I mean, Porsche realizes more people are running ethanol and the US in particular blends a bend of ethanol into fuel.

        This isn't your old school DI fuel system.

        Not sure what would be hurt or why?
      1. TXGold's Avatar
        TXGold -
        That’s awesome, Sticky! Congrats man. Look forward to pump numbers and also learning more about running corn. We have it at the pump. I know what it does to carbureted small engines and don’t like it but know people have been making big power with it for a long time. Anyone else know more about running corn? How does it compare to other race fuels? How complicated is running meth? I’ve heard you can’t run a bigger pump and bigger injection on this engine. That you have to add an injector into the cylinder to get more fuel so hopefully fuel doesn’t top out shortly after new spark plug numbers. Did you ever call driver source in Houston about the spark plug Steve said he found a step cooler?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by TXGold Click here to enlarge
        I know what it does to carbureted small engines and don’t like it but know people have been making big power with it for a long time. Anyone else know more about running corn?
        It's a matter of having the pumps and lines being up to spec. Pretty much all modern cars can handle it. Some are built for flex-fuel from the factory like some GM vehicles.

        Click here to enlarge Originally Posted by TXGold Click here to enlarge
        How does it compare to other race fuels? How complicated is running meth?
        You likely won't run straight meth but E85 offers cooling benefits in direct injected applications on top of its octane rating.

        Plus... it's cheap.

        Click here to enlarge Originally Posted by TXGold Click here to enlarge
        I’ve heard you can’t run a bigger pump and bigger injection on this engine.
        Who told you that?

        Click here to enlarge Originally Posted by TXGold Click here to enlarge
        That you have to add an injector into the cylinder to get more fuel so hopefully fuel doesn’t top out shortly after new spark plug numbers. Did you ever call driver source in Houston about the spark plug Steve said he found a step cooler?
        In direct injection applications people go to additional port fuel injectors. We aren't there yet but we'll get there.

        We wouldn't just add an injector though. That's a ghetto way of doing it.

        I'd want to use Syvecs for port injector control at that point.

        We still have room in the fuel system although likely not too much but that's where the meth kit will come in just in case.

        I haven't talked to that person in Houston. I hope they are on to something. I'll call Monday.
      1. subaru335i's Avatar
        subaru335i -
        Sweet! Some backup vbox runs or timeslips would be sweet to see what this translates to in the real world.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        Sweet! Some backup vbox runs or timeslips would be sweet to see what this translates to in the real world.
        I know... I know.

        Working on a track rental and I have a dragy.
      1. Bowser330's Avatar
        Bowser330 -
        http://f80.bimmerpost.com/forums/sho....php?t=1448983
        Stock M3 on Mustang (Gintani) ~380whp/tq

        https://www.boostaddict.com/content....yno-comparison
        Stock M3 on Dynojet (Eurocharged) ~425whp/tq

        So 425/380 = 1.12 or 12% difference

        So..... the 537whp on the Gintani Mustang for the Boostaddict 991.2 would be approximately 600whp on the Eurocharged Dynojet.