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    • 500+ horsepower rumors for "M" 550dx diesel were wrong - Gets 381 horsepower, 516 lb-ft of torque

      In an earlier article we reported that the 550dx was rumored to get 500+ horsepower. We were skeptical and stated that previous 400 horsepower and 550 pound-foot of torque numbers sounded far more realistic. Well, turns out that is exactly the case as the final numbers are 381 horsepower and 516 pound-feet of torque for the triple turbo diesel powerplant. Disappointing? Yes, as the hype for this car was out of control. This motor is mated to all wheel drive as previously reported which will help put all that torque down. Expect to see this engine make its way into other BMW models like the X-series shortly.

      This article was originally published in forum thread: 500+ horsepower rumors for "M" 550dx diesel were wrong - Gets 381 horsepower, 516 lb-ft of torque started by Sticky View original post
      Comments 23 Comments
      1. folgrz's Avatar
        folgrz -
        This is so bad-ass its not even funny

        I'm telling my dad to buy one of these
      1. Sticky's Avatar
        Sticky -
        I wanted more power but it's still sweet.
      1. 654's Avatar
        654 -
        This is huge, as I said already back then. Think about it. This is 3-liter diesel!!
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        tuning potential and a half! lol
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 654 Click here to enlarge
        This is huge, as I said already back then. Think about it. This is 3-liter diesel!!
        Weren't they already using a 3 liter diesel?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by dzenno Click here to enlarge
        tuning potential and a half! lol
        I hope so.... would be cool to see some big numbers out of these.

        I'm hoping the X3 gets this motor...
      1. 654's Avatar
        654 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Weren't they already using a 3 liter diesel?
        They have had this base engine, twin turbo 3-liter diesel since 2005, 272hp.

        Now 381hp/3-liter makes a whopping 127hp/l.
        Not to talk about torque per liter...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 654 Click here to enlarge
        They have had this base engine, twin turbo 3-liter diesel since 2005, 272hp.

        Now 381hp/3-liter makes a whopping 127hp/l.
        Not to talk about torque per liter...
        I figured they had this same displacement for a while.

        Nice to see these HP figures out of it. Will be interesting to see what other vehicles it goes into. If the X3 gets it I know I want one...
      1. fundahl's Avatar
        fundahl -
        Curious what boost pressure they are running. Must be some sort of compound setup?Open exhaust and Propane injection anyone?
      1. bluejeansonfire's Avatar
        bluejeansonfire -
        this in an x5 is my wet dream single-car tow rig

        it'll be super-available... but it'll be pricey
      1. Puerto Rican 335d's Avatar
        Puerto Rican 335d -
        @ sticky , just got my FLASH for my car @ RENNtech, will give you update in next few eweeks as to dyno runs ok
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by bluejeansonfire Click here to enlarge
        this in an x5 is my wet dream single-car tow rig

        it'll be super-available... but it'll be pricey
        That is what I am thinking, finally the ultimate tow rig.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Puerto Rican 335d Click here to enlarge
        @ sticky , just got my FLASH for my car @ RENNtech, will give you update in next few eweeks as to dyno runs ok
        Sounds good... just do it in the right thread.
      1. DBFIU's Avatar
        DBFIU -
        381 is pretty good, i was never expecting 500.
      1. Itsbrokeagain's Avatar
        Itsbrokeagain -
        500 on a diesel is approaching lemans racecar territory. 381 is much better..I'll buy one in an x5. I'm assuming it's going to be a compound turbo setup.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Matt@Camber-Toe Click here to enlarge
        I'm assuming it's going to be a compound turbo setup.
        If so I'll get one... would be amazing to see. Should also make for a challenging and fun tuner platform.
      1. Itsbrokeagain's Avatar
        Itsbrokeagain -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        If so I'll get one... would be amazing to see. Should also mak

        e for a challenging and fun tuner platform.
        Well the 3 series here and 5 series over there already have compound twin turbo setup...how they would fit a 3rd turbo is beyond me. Most diesel trucks use compounds as a way to make serious hp...for 3 turbos to fit its a plumbing nightmare.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Matt@Camber-Toe Click here to enlarge
        Most diesel trucks use compounds as a way to make serious hp
        This is what I have been reading about right now. They boost 70+ psi? It's insane.
      1. persian54's Avatar
        persian54 -
        500 torque?! Holy crap this thing will haul
      1. DBFIU's Avatar
        DBFIU -
        Diesels arent notorious for coming with huge amounts of power in stock form. The shine is in the tune and the torque. And thats what makes it fun. 381 hp doesnt sound like a lot but i bet it will pull so hard from all that torque.

        It isnt uncommon to see 70 psi boost on typical modded cummings. They boost around 30 stock. so a chip for this BMW engine will bring about lots of boost. I would be more than happy with 450 whp diesel making 700 wtq.