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    • TTE550 BMW N55 hybrid turbo upgrade - Dyno

      TTE (The Turbo Engineers Germany) posted some results with their TTE550 N55 turbo upgrade. As you can see not only do they go to a larger wheel but the blade design of their wheels is completely different from OEM.


      Out of the modern BMW turbo I6's the N55 is the one that probably needs the most help regarding upgrading the OEM turbocharger.

      TTE550 specs:

      • Genuine Housings & Components
      • Highly Efficient Next Gen Billet Compressor Geometry
      • Optimised Compressor Cover Machining Clearances
      • Latest Last Gen Larger 9 blade Turbine
      • Genuine diverter valve
      • Fitment As Original. Plug & Play
      • TTE Billet Larger Compressor Wheel
      • TTE High-Flow Bigger Turbine (Unlike others that retains stock turbine)
      • Motorsport Bearing Pack
      • 550 PS Proven
      • Single parts finely balanced then components assembled and core high-speed VSR balanced
      • Supplied with a balance test result document
      • Proven TheTurboEngineers quality
      • Made in Germany

      TTE included a dynograph to prove the output which is something they should do more often.

      489 PS at the wheels and 558 PS as the crank:


      They make what they are rated at and 550+ horsepower capable. They hit these numbers without water-meth or E85. The fuel used works out to roughly 96 octane.

      Certainly a turbo for N55 owners to consider but mostly for local European guys considering how many N55 hybrid upgrade options there are in the USA.






      This article was originally published in forum thread: TTE550 BMW N55 hybrid turbo upgrade - Dyno started by Sticky View original post
      Comments 17 Comments
      1. maxnix's Avatar
        maxnix -
        Impressive.
      1. alcuin's Avatar
        alcuin -
        nearly 800Nm...

        this is just to show the possibilites of the turbo but not great for reliability in a N55.
      1. Jerain's Avatar
        Jerain -
        That torque is insane, fuel will probably be 102RON as they have the best pump fuel in Germany...
      1. Alpina_B3_Lux's Avatar
        Alpina_B3_Lux -
        Click here to enlarge Originally Posted by alcuin Click here to enlarge
        nearly 800Nm...

        this is just to show the possibilites of the turbo but not great for reliability in a N55.
        Or driveability. Iíve got an M235i with bolt-ons making 405 hp / 600Nm torque (crank) and you seriously feel the need for an LSD, wheelspin all over the place in the first 4 gears.

        With 800Nm Iím sure the driveability will suffer if you want to do anything else but high-speed runs.
      1. CobraMarty's Avatar
        CobraMarty -
        Are you saying, poor drivability because 'Too much Power'?
      1. Alpina_B3_Lux's Avatar
        Alpina_B3_Lux -
        Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
        Are you saying, poor drivability because 'Too much Power'?
        Yes exactly. With 400hp it’s already more than struggling to get the torque on the ground as soon as there’s a corner, which I could still improve with an LSD, better suspension and wider tires. Add another 150hp and 200Nm and all its good for is wheelspin. Of course, if you like that, that’s fine but at least for me that’s in the long run no fun to drive.
      1. M&M's Avatar
        M&M -
        LSD isn't gonna help much with wheelspin.
      1. alcuin's Avatar
        alcuin -
        Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
        Are you saying, poor drivability because 'Too much Power'?
        at least too much low end torque.

        i know, here we like that kind of graphs but as Alpina_B3_Lux says, that torque is unnecessary in a RWD N55.

        I don't know why people like so much that low end torque software.

        wouldn't it be better to control boost and have max 500Nm at 3000rpm and increase slowly till 600Nm at 6500rpm?

        far more reliable and easier to drive.
      1. Jerain's Avatar
        Jerain -
        Click here to enlarge Originally Posted by M&M Click here to enlarge
        LSD isn't gonna help much with wheelspin.
        LSD surely helps with "inside wheelspin" flooring it out of a bit of corner, think that's what he means...

        I have an OS Giken Superlock, it's a massive difference compared to an open diff.
      1. atorrealba's Avatar
        atorrealba -
        So is N55 officially coming out the trenches of tuners?
      1. M&M's Avatar
        M&M -
        Click here to enlarge Originally Posted by Jerain Click here to enlarge
        LSD surely helps with "inside wheelspin" flooring it out of a bit of corner, think that's what he means...

        I have an OS Giken Superlock, it's a massive difference compared to an open diff.
        Yeah sure, but in a straight line there's almost no benefit.
      1. CobraMarty's Avatar
        CobraMarty -
        I like using the stock N55 TurboFold and machining it to accept bigger wheels.
        Now if RB and VTT and others would follow suit to this level.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
        I like using the stock N55 TurboFold and machining it to accept bigger wheels.
        Now if RB and VTT and others would follow suit to this level.
        Don't VTT and RB have N55 solutions?
      1. Jerain's Avatar
        Jerain -
        Click here to enlarge Originally Posted by M&M Click here to enlarge
        Yeah sure, but in a straight line there's almost no benefit.
        With drag radials that don't lose traction and don't spin only one wheel, not much difference in straight line compared to a high locking clutch lsd. But in street situations with street tyres there is a diffetence in grip in most of the common situations.
      1. Alpina_B3_Lux's Avatar
        Alpina_B3_Lux -
        Click here to enlarge Originally Posted by Jerain Click here to enlarge
        LSD surely helps with "inside wheelspin" flooring it out of a bit of corner, think that's what he means...

        I have an OS Giken Superlock, it's a massive difference compared to an open diff.
        Exaxtly. The M235i comes with an open diff stock and that becomes an issue when you increase the torque massively. A limited slip diff like from OS Giken, Quaife, Wavetrac or Drexler would be of immense help when cornering as I would have traction on the wheel that needs it.
      1. Alpina_B3_Lux's Avatar
        Alpina_B3_Lux -
        Click here to enlarge Originally Posted by M&M Click here to enlarge
        Yeah sure, but in a straight line there's almost no benefit.
        Thatís right but then Iím not interested in straight line performance. I want the car to drive well on curvy roads and on a race track like the Nordschleife, and I need to be able to use the additional power of a remap in these situations. Right now thatís an issue because the car canít put the power down.

        Itís one of the main reasons I sold my heavily modded 335i in the end because what use is that much power when the chassis isnít built for coping with it.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Jerain Click here to enlarge
        With drag radials that don't lose traction and don't spin only one wheel, not much difference in straight line compared to a high locking clutch lsd. But in street situations with street tyres there is a diffetence in grip in most of the common situations.
        He's right on.

        The main thing you get is you can heat both tires at the strip...

        Handling benefits are what an LSD is for.