• BMW explains their triple turbo Diesel motor with an animation

      When we first heard about these upcoming triple turbo motors from BMW many of us scratched our heads wondering exactly how they would work. Rumors abounded. Two gas turbos and an electric turbo? A compound turbo setup? Well, this video should clear things up and explain how BMW is able to hit 381 horses and 546 pound-feet of torque in a production 3.0 liter diesel six cylinder. To have so much technology (like 3 variable turbine geometry turbos set to come on and supplement each other at different rpm ranges) not make it to the United States makes us want to cry. Watch the video and try not to shed any tears.



      This article was originally published in forum thread: Animation: BMW Tri-Turbo Diesel Engine started by DavidV View original post
      Comments 17 Comments
      1. leo985i's Avatar
        leo985i -
        If this $#@! was coming to the US - I think I would get it, just looks way too awesome.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leo985i Click here to enlarge
        If this $#@! was coming to the US - I think I would get it, just looks way too awesome.
        I know I would get it. Then have fun trying to tune it... Click here to enlarge
      1. inlineS54B32's Avatar
        inlineS54B32 -
        This thing is amazing. Who would have thought that a 3.0 liter diesel could create that much power and remain that efficient (35 MPG if I calculated that right)... You almost wouldn't need a transmission if they put it in something like a 1 series. Click here to enlarge
      1. leo985i's Avatar
        leo985i -
        But as usual BMW letting the US enthusiast down. So I say $#@! THEM!!! they sure as $#@! not gonna get my cash when I'm looking for a new ride. The new M3 will have to be really really special to wanna stay with BMW.
      1. Itsbrokeagain's Avatar
        Itsbrokeagain -
        Its almost a compound turbo style, but kinda not...the compressors dont feed into one another. Mind boggling.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Matt@AUTOCouture Click here to enlarge
        Its almost a compound turbo style, but kinda not...the compressors dont feed into one another. Mind boggling.
        So how is this manifold set up to accommodate 3 turbos exactly? It's tough to see much of anything in the video.
      1. Itsbrokeagain's Avatar
        Itsbrokeagain -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        So how is this manifold set up to accommodate 3 turbos exactly? It's tough to see much of anything in the video.
        Actually now that i watch it again, it IS a setup. Similar to how we do the american diesels.

        Exhaust from the top two turbines feeds into the main turbine at the bottom.
        Meanwhile the initial intake charge is pumped through the main compressor at the bottom, gets compressed and fed into the two upper compressors and then fed to the intake manifold.

        This most likely ensures low EGTs and emissions. Compound setups on 5.9, 6.6 and 6.7L diesels here routinely make 600+hp and 1200-1300ft/lbs, and EGTs are usually in the 1000 degrees F range.

        Diesels rely on injection timing and lots of air to ensure complete combustion. Too much fuel and not enough air leads to high EGTs and melted pistons. When you stress the motor under heavy load (aka towing), compounds can supply enough air in the midrange to keep the motor happy and still be driveable.

        Just a little lesson in diesels.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Matt@AUTOCouture Click here to enlarge
        Actually now that i watch it again, it IS a setup
        You left a word out here, you mean it is a compound setup?
      1. Blitz535i's Avatar
        Blitz535i -
        Click here to enlarge Originally Posted by Matt@AUTOCouture Click here to enlarge
        Its almost a compound turbo style, but kinda not...the compressors dont feed into one another. Mind boggling.
        Mind boggling; yes. But let's all remember that Nissan still builds better motors than BMW...Click here to enlarge
      1. Itsbrokeagain's Avatar
        Itsbrokeagain -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You left a word out here, you mean it is a compound setup?
        Yes compound setup.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Blitz535i Click here to enlarge
        Mind boggling; yes. But let's all remember that Nissan still builds better motors than BMW...Click here to enlarge
        Clearly, because of the 1/4 mile times GT-R's are running... Click here to enlarge
      1. inlineS54B32's Avatar
        inlineS54B32 -
        Click here to enlarge Originally Posted by Blitz535i Click here to enlarge
        Mind boggling; yes. But let's all remember that Nissan still builds better motors than BMW...Click here to enlarge
        Hurry! Lock the thread!

        We all know that the VQ would PWN this thing if you put diesel in that biatch. You cannot screw with the VQ (I just made that up - it rhymes!)

        All joking aside, this is one amazing piece of engineering. Not my cup of tea for an M - but damn cool nonetheless. Torque anyone?
      1. maxnix's Avatar
        maxnix -
        Holy mother of Mary, bring this to the USA as a M350d!

        I might even buy it in a M550d if I had to.
      1. Sticky's Avatar
        Sticky -
        Pains me they do something cool and won't bring it here. This one really hurts.
      1. 62Lincoln's Avatar
        62Lincoln -
        This would be the one car for which I would seriously consider trading my 335d. Too bad.
      1. whoosh's Avatar
        whoosh -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Pains me they do something cool and won't bring it here. This one really hurts.
        The real irony is that every last one of these are made at the Spartanburg, SC plant. I saw a few of them myself on the tour during my PCD. Total bummer that we cant buy them here.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by whoosh Click here to enlarge
        The real irony is that every last one of these are made at the Spartanburg, SC plant. I saw a few of them myself on the tour during my PCD. Total bummer that we cant buy them here.
        Heh, just an extra kick to the balls.