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    • Before and after OE Tuning W218 Mercedes CLS550 M278 V8 twin turbo dyno tune: +48 whp, +62 wtq

      This is the first before and after tune dynograph we have seen for the M278 4.7 liter twin turbo direct injected V8. The results are impressive, as expected. The car tuned is a 2012 W218 Mercedes CLS550 completely stock on 91 octane. Baseline was a respectable 342 wheel horsepower. After the custom dyno tune, 389.9 whp. Torque went from 382.8 to 444.4. Looks like the M278 is going to be a formidable platform and have some people second guessing whether a 63 AMG model with the M157 is worth the extra cash.








      Dyno video:

      This article was originally published in forum thread: Before and after OE Tuning W218 Mercedes CLS550 M278 V8 twin turbo dyno tune: +48 whp, +62 wtq started by Sticky View original post
      Comments 5 Comments
      1. Exeenom's Avatar
        Exeenom -
        48 whp gain and 62 wtq is a very nice increase for the M278.... that's almost 60 hp to the crank Click here to enlarge

        If OE gained this much on the M278 engine, I can't wait to see what kind of gains they'll make on the M157 Click here to enlarge
      1. V12Godspeed's Avatar
        V12Godspeed -
        Congrats to OE for putting down some great numbers.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Exeenom Click here to enlarge
        If OE gained this much on the M278 engine, I can't wait to see what kind of gains they'll make on the M157
        On the standard M157 HUGE gains will be had. I mean HUGE!

        The issue will be the Performance Package cars which will be closer to the turbo limit.
      1. 427's Avatar
        427 -
        Is anyone currently running this tune in their CLS550... if so, may we please have some feedback?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 427 Click here to enlarge
        Is anyone currently running this tune in their CLS550... if so, may we please have some feedback?
        Nope, but the results from both of these tuners should show you there is plenty of power to gain.