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    • Topspeed Motorsports building the fastest/strongest Porsche 991 Turbo in the country - 1130 awhp

      Topspeed Motorsports claims to have the fastest and most powerful Porsche 991 Turbo in the USA. Technically, the most powerful comment is true as their 991.1 Turbo has the highest dynograph posted for a 991.1/991.2 Turbo model in the USA to date.


      1130 all wheel horsepower is impressive:


      Let's go go over the specifications as described by Topspeed Motorsports:

      ENGINE:

      Our engine program is something I am very proud of and have been borderline obsessed with for many years. We work with some of the smartest people in the world when it comes to high horsepower engine development. I have been blessed with partnerships that have advanced TSMís builds far beyond what I could have ever dreamed. We have built engines for Porscheís before, but never have we gone this far into custom processes as we did on the 991. We developed completely custom pistons and rods with CP/Carrillo that are 100% proprietary to TSM. We have been using them in other HP applications for years so they were very excited to create a program for us in the Porsche world. We then moved on to the cylinder walls. The factory processes are certainly not strong enough to handle big power, so we used a process that we implement for other big power aluminum blocks in order to provide a much stronger cylinder wall that can hold up to the abuse of high boost/torque applications. We also called our friends from ARP and had them develop some stronger case bolts and head bolts than are available on the market.

      Along with the bottom end we contracted our friends from GSC to help us with the entire valvetrain. For those of you who donít know, GSC is a US based company out of SC that does fully billet camshafts and entire valvetrain products for a plethora of applications. I wanted to be able to spin this engine to well over 8000RPM, so developing a full valvetrain and cam setup was necessary.

      We have a couple more very exciting things coming in the coming months as far as highly upgraded engine internals, however as of now, Iím extremely excited and confident in our built 991 engine program.

      TURBOS:

      For turbos we are almost done developing the turbos for our ELITE1300 system, but we just couldnít get them done in time for this build. In the meantime we decided to use a smaller turbo that was readily available. This left a lot of potential on the table but it was what we had to work with so in interest of forward motion on the project we decided it was worth the ďsacrificeĒ. Iím really excited about the turbos we are developing. They will most certainly be on the car for the next event! The current turbos on this car are 30R sized ,with a 57mm inducer, and run out of breath in the high 20ish PSI area. Our upcoming turbos will be capable of much, more power.

      FUELING & 12 INJECTOR:

      Fueling is tricky on these cars as you all know. The car is direct injected similar to the newer Lambo and R8. There are no upgrades to direct injection systems currently for the Porsche so creating something from scratch was necessary. We teamed up with Gosha Turbo Tech, who built a billet intake manifold in order for us to add port injection on top of the DI system of the 991. We then provided the secondary rails with fuel from dual Walbro pumps completely separate from the factory system. What this means is that driving around during your daily commutes the car drives 100% on the factory DI system. That ensures a like stock driving experience until you hammer the loud pedal. At that point the secondary system engages and provides the port injection with the fuel it needs to sustain well over 1000whp.

      ECU:

      While we do most of our bolt on and upgraded turbo Porsches on Cobb, this build required something a little more complex. We needed the ability to control a secondary set of injectors as well as truly manage the power. The factory ECU does a great job up to a certain point, but once you go beyond itís capabilities it turns into a real struggle. With this level of build you really need a full standalone. The ability to have full motorsports style traction control, trigger outputs for fuel systems, and get by all of the factory torque limiters made it necessary to call Syvecs and order their PNP 991 Turbo kit. The system is certainly a step in the right direction from the factory ECU when it comes to high HP. The gentlemen at Syvecs provide good support and are always willing to help in a pinch. Traditionally we use Motec on our big HP GT-Rs, but given they do not offer a solution for the 991 we chose Syvecs, and they have been great to work with.

      TRANSMISSION:

      The transmission in this car remains a PDK as the customer really wants to retain the amazing drivability of the dual clutch transmission. It has upgraded clutches by Dodson, but otherwise is stock. Iím personally pushing very hard for the next level of development on the PDK with our friends at Dodson and Shephard Transmission. We are hoping in the not so distant future to be able to build a rock solid 1500hp capable PDK transÖ time will tell on that.


      Ok, so that is an impressive build list and the have the usual goodies including a Syvecs ECU and Dodson PDK transmission. The 4.0 liter engine is very impressive but the fueling is key here.

      They teamed up with Gosha Turbo Tech to create a port injection system which no doubt the Syvecs greatly helps with when it comes to control of the additional injectors. With the direct injected 3.8 liter 911 Turbo models this seems to be the only way to get them enough fuel to make big power.

      So what is the performance like? Well, they say it is the fastest but they do not have the 1/4 mile record on the platform. The US record belongs to PorscheBoost forum member @9SECDD and his stock internal 991.1 Turbo S. The Topspeed Motorsports Turbo should in theory top it but until it does, a record is a record.

      It does hold the 1/2 mile record with a 193.97 mile per hour pass:


      That is moving!

      Overall an incredible build and the top 991 Turbo in the USA by far. Hopefully that fuel system trickles its way down to the new 991.2 3.0 models as well.












      This article was originally published in forum thread: Topspeed Motorsports building the fastest/strongest Porsche 991 Turbo in the country - 1130 awhp started by Sticky View original post
      Comments 13 Comments
      1. ballinator's Avatar
        ballinator -
        Intake Manifold billet by GTT (Gosha Turbo Tech) - Russian tuning company
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ballinator Click here to enlarge
        Intake Manifold billet by GTT (Gosha Turbo Tech) - Russian tuning company
        Yes, they're Russian. And?
      1. Bowser330's Avatar
        Bowser330 -
        extremely potent! wow Top Speed setting the bar very high...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        extremely potent! wow Top Speed setting the bar very high...
        Yep, this is a highly impressive build.
      1. Payam@BMS's Avatar
        Payam@BMS -
        This is beautiful.
      1. 9SECDD's Avatar
        9SECDD -
        There is no doubt that this car will beat my 1/4 mile U.S. record. It's a great build. I'll just have to be happy with the stock motor bolt-on record. Click here to enlarge
      1. F16HTON's Avatar
        F16HTON -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Yes, they're Russian. And?
        Collusion...

        oh, wait, wrong thread.
      1. kouzman's Avatar
        kouzman -
        Super impressive setup. I don't dare asking price for a similar kit. 193mph is 10+ mph higher than enaything else I have seen so far. Quite the test platform. Huge cudos to TSM.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by kouzman Click here to enlarge
        Super impressive setup. I don't dare asking price for a similar kit. 193mph is 10+ mph higher than enaything else I have seen so far. Quite the test platform. Huge cudos to TSM.
        The fuel system plus Syvecs ECU is $$$$
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The fuel system plus Syvecs ECU is $$$$
        Isn’t the 4.0 engine the most expensive part of this build?
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        Isn’t the 4.0 engine the most expensive part of this build?
        Toss up. Both are big money.
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky2 Click here to enlarge
        Toss up. Both are big money.
        I actually think you’re correct, would edit my previous post.

        What’s the consensus on how much this package would cost? $50k? $75k
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        What’s the consensus on how much this package would cost? $50k? $75k
        No idea. If you could do it all direct injection only you would save a ton of coin.

        Wonder if those XDI pumps will carry over into the Porsche world.