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    • Budget GT2 RS - Porsche 991.2 Carrera T 3.0 gets the full TIal Sport treatment - Upgraded turbos, intercoolers, plenum, and inlets

      No, the title is not as crazy as you might think. The Porsche 911 GT2 RS is obviously the highest performance 911 ever sold by the factory. It also starts at $300k providing you can even get your hands on one or a build slot. The Carrera T on the other hand is a tremendous value starting at $102k.


      Let's just say the Carrera T is 1/3 the price if not more based on markups. With (an underrated) 370 horsepower it is at almost half the output of a GT2 RS and its 700 horsepower 3.8 liter flat-6 but that is where Tial Sport comes in.

      This Carrera T was upgraded by BR Racing and they ordered the following parts:

      Tial Sport M660 991.2 3.0 turbochargers
      Tial Sport 991.2 3.0 Intercoolers
      Tial Sport 991.2 3.0 Inlets
      Tial Sport 991.2 3.0 Plenum

      These are the same parts BoostAddict.com helped develop and test for the PorscheBoost Project 991.2 Carrera which shares the same motor with the Carrera T.

      Porsche artificially keeps output low on the Carrera T by fitting it with the smaller Carrera turbochargers. Surpassing S and GTS output is simple with the M660 turbochargers which include larger wheels. They fit like stock as they use the factory housing. There is no spool sacrifice with a much stronger top end punch.


      A new part from Tial Sport is the intake plenum.

      Look at the stock piece:


      Now the Tial Sport piece:




      Quote Originally Posted by BR Racing
      In the image above, you can see where a flow bottleneck exists. The numbers proved this as well. Using laser mapping to understand the space requirements and limitations, a new intake plenum was designed. Here is an image of the new intake. Take special note, this is NOT a cast part, as was the method of production in the past. This is an ALUMINUM 3D printed part. This allows even further optimization of the design of the part, not just for fast prototyping, but in the actual manufacture of the part as well. The insides of the new intake are perfectly smooth, all elements have been refined, not like the old “CAST” method of production.

      Size, flow, fitment were all optimized. Yet, it is a true “plug and play” replacement. Mates perfectly to the stock intake manifold, and has the perfect face to match to the throttle body. Again, this is a complete 3D printed solution. Just amazing.
      An upgraded plenum was already tested on the PorscheBoost.com Project 991.2 Carrera and it showed nice mid-range gains. The Tial Sport design will be tested shortly.

      What was next? The inlets/intake tubes:




      Quote Originally Posted by BR Racing
      The next part of the puzzle or total solution needed to be the intake tubes. If you are going to optimize the power of a turbo solution, you need to feed the turbos more air, as they are going to product more boost…and you then need to optimize the flow of the increased boost to the intake…and, along the way, cool the turbo output thru the intercoolers. So, in looking at the OEM solution, the intake tubes were way too small to accomplish the goals.

      While visual evidence again existed…you can see that the current intake tubes were a bottleneck, TiAL took a proper full design approach. They again used lazer mapping to understand the space constraints, and to map the attachment points so that the new solution would also be “plug and play”. Here are the images of the intake tubes, also made of aluminum.

      For those of us that have been in this business for a while, these new parts are truly amazing and a marvel. The design, flow, and weight are exactly what you would want. No tradeoffs, no downsides. They mate perfectly as they should, no special accomodation needed in the install. Sensors are the perfect location.
      The inlets are highly recommended especially with upgraded intercoolers and turbos. More flow, greater efficiency, and less heat from the turbos not having to work as hard? Yes, please!

      Speaking of intercoolers...










      Quote Originally Posted by BR Racing
      Here are the new Intercoolers. One of the old fluid dynamic rules is that any 90 degree change in direction of a fluid flow results in upwards of a 12% loss of pressure. There are a ton of Intercoolers in the market today for all sorts of turbo based solutions, and you can usually instantly tell which ones have been properly designed versus those that have not, just by looking at the Intercooler end tanks. TiAL used the new 3D printing solution to fully optimize the production of their Intercoolers. Just look at the end tanks alone!

      TiAL maintained the complete plastic cage, and came up with amazing unique 3D printed “clips” to allow the same superstructure to be used, but since the IC are thicker, it created these clips to allow the structure to be extended. As a result, the IC’s fit perfectly. Amazing, creative.
      Tial Sport also addressed the hoses:


      Quote Originally Posted by BR Racing
      What we appreciated here, in working w TiAL, was the complete attention to detail First, it was the completeness of the solution, next it was the design and manufacturing methods to fully optimize the solution, not just doing it, but getting the most from the upgrades. That even included the hoses. Most aftermarket turbo manufacturers realize that stock hoses can not cope, nor last, under the higher boost loads. But, TiAL went farther, not only producing silicone & reinforced hoses, but incorporating the hose ID and OD into the design…such that there are no “separation” or vortices induced into the flow due to the mismatch of the hose and elements, and disruption of the flow. Finally, they incorporated elements that ensure the hoses will fit, and stay attached.

      Notice as well…they didn’t just produce silicon hoses, they double wrapped them, both for heat protection, and to eliminate expansion under load or boost. The outer covering also ensures long life, as they will be cutting, wearing through, or coming apart.

      So, how do all these pieces fit together? Just like they were designed from the factory. This is product eye candy in the full sense….not only functional, but truly beautiful. There is some trimming of the plastic cage and surrounding plastic elements, but that’s only natural to fit larger parts.



      Now onto the most important piece of the puzzle, the turbochargers.

      A refresher on the specs:

      New OEM CHRA. ( Bearings, shaft, thrust washers )
      Larger turbine wheel 50.5mm
      Larger 61mm Compressor wheel

      Core OEM units (starting life from OEM 991.2 C2/4, C2S/4S, or GTS2/4 turbos) are then:

      - Disassembled and Inspected
      - Hot Ultrasonic Immersion Cleaned. Di Water rinse.
      - Shot peened to restore finish to new or better appearance to Compressor and Turbine housings.
      - 5 Axis turned / Machined.
      - Reassembled and clocked for installation.




      Quote Originally Posted by BR Racing
      The piece that most projects focus on when building more power from a turbo based engine are the turbos themselves, and these certainly got the full consideration here too. But, they were designed with specific specs, gains, objectives in mind….not just bigger. TiAL implemented them in two parts…part was to use the existing housing, but change the internals and the impeller / compressor wheel, the other was to make a complete new housing on the exhaust side to maximize the results. In other words, get the exhaust impeller to spin faster, quicker…get the intake impeller to produce more boost and to spin faster. The other part, to ensure they fit in exactly the OEM position, location, mounts. The new turbos (which are slightly different side to side, the right and left looking similar, but due to the cooling lines, mounts, diverter valves and actuators, are not) bolt right in, along with the cooling lines and fittings. The simple answer, yes, the turbos are bigger
      The turbos are the most important piece of the hardware puzzle but you need software to optimize them. This Carrera T is running Cobb factory turbo software for now as they are waiting on Cobb to release a tune for the upgraded turbos.

      BoostAddict no longer recommends Cobb tuning (for reasons that will become apparent in the next few weeks) but there are several quality tuners that can provide a custom dyno tune for upgraded turbo hardware.

      Gintani tuned the PorscheBoost Project 991.2 with the upgraded turbos to 540 wheel horsepower on a Mustang dyno on the factory inlets and intercoolers on 91 octane pump fuel.

      This puts the car roughly 60 whp short of a GT2 RS but after headers, inlets, and intercoolers the gap should be even smaller.

      Another way of looking at it is a 991.2 Carrera or Carrera T with the full Tial Sport hardware can provide 90% of the performance of a GT2 RS for less than 33% of the price.

      I don't know about you but I would call that a bargain.

      Final install pictures:










      Final verdict:

      Quote Originally Posted by BR Racing
      At this point…we are only running a custom Stage 1 tune. The Stage 2 custom TiAL tune is in development, and will be installed soon. The target for the Stage 2 tune is 700bhp…..Yep…you read that right, 700HP.

      The result, even w the standard Stage 1 tune, is amazing. NO turbo lag, torque on tap at almost any RPM, power all the way thru the RPM range. Exhaust sound / tone is better. No downsides, unlike most other major turbo upgrades…..WE LOVE IT.
      So what are you waiting for? If you have a 991.2 Carrera, Carrera S, Carrera T, or even Carrera GTS you can extract much more power in a very OEM like manner utilizing your factory turbo housings and completely bolt in Tial Sport upgrades.

      The 991.2 3.0 platform is the best Porsche 911 performance bargain of all time.

      Feel free to PM or e-mail admin@boostaddict.com to order, plenty of Tial Sport parts in stock: https://www.porscheboost.com/showthr...-ready-to-ship

      This article was originally published in forum thread: Budget GT2 RS - Porsche 991.2 Carrera T 3.0 gets the full TIal Sport treatment - Upgraded turbos, intercoolers, plenum, and inlets started by Sticky View original post
      Comments 28 Comments
      1. Bowser330's Avatar
        Bowser330 -
        It would be nice to see track times and more real world dragy data to prove how quick and fast the 991.2 becomes with the above mentioned modifications.
      1. flsupraguy's Avatar
        flsupraguy -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        It would be nice to see track times and more real world dragy data to prove how quick and fast the 991.2 becomes with the above mentioned modifications.
        +1 Looking forward to it.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        It would be nice to see track times and more real world dragy data to prove how quick and fast the 991.2 becomes with the above mentioned modifications.
        You will get them.
      1. F16HTON's Avatar
        F16HTON -
        All those words by BR and not a single number. What a waste of time reading. Embarrassing.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by F16HTON Click here to enlarge
        All those words by BR and not a single number. What a waste of time reading. Embarrassing.
        Lets’s not discount them just because they didn’t do a custom tune. Some shops have different strengths.

        I appreciate more people getting the turbos as well as the install photos and feedback.

        Glad to see more people tuning their 991.2 instead of being scared over their warranty. More data will come, this is a good post for n00bs and rennlisters.
      1. 93siro's Avatar
        93siro -
        There mist be a reason turbo models have fender inlets for cooling. I think without them the heat soak problem still remains.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 93siro Click here to enlarge
        There mist be a reason turbo models have fender inlets for cooling. I think without them the heat soak problem still remains.
        Porsche should have known better and given us water-air.
      1. 3DMetal's Avatar
        3DMetal -
        Amazing installation by BRRacing. They took their time and detailed every step. They should be the go-to install for anyone in that area of California.
      1. 3DMetal's Avatar
        3DMetal -
        Click here to enlarge Originally Posted by 93siro Click here to enlarge
        There mist be a reason turbo models have fender inlets for cooling. I think without them the heat soak problem still remains.
        Then it be the "Capital T" Turbo .. not the Carrera .

        Designing a proper intercooler, means understanding how changes to design and core parameters effect the rate of heat you can pull out of the charge. Its not just how much the inter cooler removes. "Heat soak" is the difference.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 3DMetal Click here to enlarge
        Amazing installation by BRRacing. They took their time and detailed every step. They should be the go-to install for anyone in that area of California.
        It is a well detailed install.

        People are hungry for numbers and data and that is where I will come in.
      1. ///M3THOD's Avatar
        ///M3THOD -
        This is exciting! Im surprised we haven't seen a Y pipe upgrade as well.

        How effective are the inlet tubes since they utilize the stock airbox? The restriction still remains at the outlet size of the stock airbus regardless if the new tubes are 3". Shouldnt that be addressed with a a new airbox with larger outlets?

        Also, since the turbo upgrade is largely stock looking, can you return the car on the stock tune when taking it into the dealership if one is trying to be stealthy about it and have it still run properly?
      1. 3DMetal's Avatar
        3DMetal -
        Click here to enlarge Originally Posted by ///M3THOD Click here to enlarge
        This is exciting! Im surprised we haven't seen a Y pipe upgrade as well.

        How effective are the inlet tubes since they utilize the stock airbox? The restriction still remains at the outlet size of the stock airbus regardless if the new tubes are 3". Shouldnt that be addressed with a a new airbox with larger outlets?

        Also, since the turbo upgrade is largely stock looking, can you return the car on the stock tune when taking it into the dealership if one is trying to be stealthy about it and have it still run properly?
        Inlets show a massive increase in flow. The air box / filter does not seem like a restriction. ( will publish sensor logs ) The effective area for these filters are massive.

        The other restriction is at the 180 degree turbo neck, we have an Aluminum 3D printed solution that works with the larger inlet tubes and larger turbo chargers.

        The stock tune will control these turbos, you can switch to stock calibration and drive.
      1. TXGold's Avatar
        TXGold -
        What are details on 180* tubes?
      1. 3DMetal's Avatar
        3DMetal -
        Click here to enlarge Originally Posted by TXGold Click here to enlarge
        What are details on 180* tubes?
        Continues the 76mm dia intake tube, all the way to the compressor inlet. Not needed as badly on the stock compressor covers.

        Lets get some fast times ran.
      1. TXGold's Avatar
        TXGold -
        Thank you. How much, are they available and are same cuffs included?

        Protomotive tune revision got me a 7.4 60-130 and 11.04 ET this morning on Dragy. Thanks for making these things 3D!!! Are you working on any turbos capable of greater than the 650whp Tial says the M660 is limited to?
      1. 3DMetal's Avatar
        3DMetal -
        Click here to enlarge Originally Posted by TXGold Click here to enlarge
        Thank you. How much, are they available and are same cuffs included?

        Protomotive tune revision got me a 7.4 60-130 and 11.04 ET this morning on Dragy. Thanks for making these things 3D!!! Are you working on any turbos capable of greater than the 650whp Tial says the M660 is limited to?
        7.4 !! That is amazingly fast. As the tunes progress, and the ECU systems continue to be mastered, I think we will see faster and faster times.

        The TiAL M660 is roughly sized to yield 660 whp. Larger is always possible, even within the same housings, but is the trade off in response worth it? That is where having multiple options helps the enthusiast choose their own adventure.

        The inlet elbows, are not yet available, but will be something that is part of the larger turbo charger presentation. Its not worth optimizing them for the stock configuration, if it yields smaller results.

        The high flow inlets flow : 570 CFM @ 0.05 Bar ( 20" water ) vs.
        the stock plastic ones : 330 CFM @ the same.

        Also eliminating the internal convolutions and compressor muffler.


        Ill share the inlet elbos progress with the group, but nothing needed so far to get to 600+ whp. How much does the market want!
      1. Markblackwell's Avatar
        Markblackwell -
        Great,
        pictures of the build, Tial makes high quality parts and Turbos, Bruce over at BR Racing owns a great shop and they do quality work they are also the guys that did the install on the first Dodson clutch in the US on the fastest VTG 991.1 Turbo in the world.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ///M3THOD Click here to enlarge
        Im surprised we haven't seen a Y pipe upgrade as well.
        I was wondering about this as well. Seems we could see gains there too over the factory pipe design?

        Click here to enlarge Originally Posted by ///M3THOD Click here to enlarge
        Also, since the turbo upgrade is largely stock looking, can you return the car on the stock tune when taking it into the dealership if one is trying to be stealthy about it and have it still run properly?
        This is my car with the upgraded turbos on a factory turbo tune:https://www.boostaddict.com/content....e-2017-Carrera

        We saw a 10 whp gain and the car did not know the turbos changed. The ECU is still requesting the same parameters.

        Click here to enlarge

        Nobody outside would know either as you would literally have to remove and disassemble to check. No way anyone would know.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 3DMetal Click here to enlarge
        The other restriction is at the 180 degree turbo neck, we have an Aluminum 3D printed solution that works with the larger inlet tubes and larger turbo chargers.
        I want this... now.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by TXGold Click here to enlarge
        Are you working on any turbos capable of greater than the 650whp Tial says the M660 is limited to?
        There is a Stage 2 coming that is a new turbo completely with new housings. No core exchange required.

        Now, keep in mind past 650+ whp if not earlier you will need to build the motor. Past 650 whp you will also need to add port fuel injection most likely just like the Turbo. Then, you will need a standalone controller like a Syvecs. Don't forget about building the PDK either.

        Going from 650 whp to 850 let's say is a cost difference of roughly $30k.

        The reason the Tial M660's are a perfect upgrade is:

        1. OEM housing so even the dealer can't tell.
        2. Spool just like stock (actually better if compared to the GTS) with far more punch. You aren't sacrificing anything.
        3. Affordable. We're talking $3800 + software.

        I'll definitely be going the built motor route once I max these out but I don't think most people even understand how perfect the car is with the BoostAddict Stage 3 right now. The chassis isn't overwhelmed, you still have traction, the transmission handles it fine, meth adds cooling and consistency, etc.

        It's literally as if Porsche did it themselves but wasn't worried about stepping all over the Turbo or Turbo S.