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    • First Mercedes M256 3.0 I6 turbo with electric compressor assist tuning results - Race Chip C238/A238 E53 AMG tune

      Finally some tuning for the new Mercedes M256 inline-6 3.0 turbo motor. This motor powers newer 53 AMG models such as the C238/A238 E53 AMG coupe (A238 denotes cabriolet, C238 denotes coupe) which is rated at 429 horsepower and 384 lb-ft of torque.


      What makes the M256 I6 interesting is the higher horsepower versions you see in the 53 AMG models have an electric compressor.

      It provides a quick torque boost to reduce lag:

      Quote Originally Posted by Mercedes
      Its performance is as dynamic as that of a V8, as the new six-cylinder in-line engine comes with an especially intelligent form of turbocharging: assisted by the ISG at start-off, the electric auxiliary compressor (eZV) guarantees immediate high torque when driving off and accelerating, bridging the time before the large exhaust turbocharger cuts in. The electric turbocharger accelerates to 70,000 rpm within 300 milliseconds, ensuring an extremely spontaneous reaction from the engine. The result is a dynamic engine response with no turbo lag.
      Interesting, cool, but complex which may make things difficult on tuners.

      Race Chip posted their tuning results but not the peak figures for the baseline for whatever reason. The overlay shows they picked up torque through the curve but it would be great to know exactly how much power and torque they picked up:


      They are at 493 crank horsepower and 480 lb-ft of torque but again what are he stock peak figures? They say they picked up close to 100 Nm so 73 lb-ft of torque or so.

      Fortunately they did get before/after acceleration figures.

      Stock 100-200 kph:


      Race Chip tuned 100-200 kph:


      Just over a 2-second improvement which is nice but the M256 does not seem all that impressive as a performance platform or at least not yet.

      For some context:


      A good improvement over stock.


      This article was originally published in forum thread: First Mercedes M256 3.0 I6 turbo with electric compressor assist tuning results - Race Chip C238/A238 E53 AMG tune started by Sticky View original post
      Comments 3 Comments
      1. Fuhrmann's Avatar
        Fuhrmann -
        Some "file" supplier have it in their database, so its funny racechip call them the firstClick here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Fuhrmann Click here to enlarge
        Some "file" supplier have it in their database, so its funny racechip call them the firstClick here to enlarge
        Who? Renntech? Brabus?
      1. Fuhrmann's Avatar
        Fuhrmann -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Who? Renntech? Brabus?
        Those mentioned i wouldn`t call file supplier. You had a AT tool if i remember right? Turn on your Winols and watch arround in the projects you can "buy" then you see what i meanClick here to enlarge