• Renntech tuned SLS Black Series M159 V8 with Renntech headers hits 562 wheel horsepower

      Nice results here from a Mercedes SLS AMG Black Series whose 6.2 liter M159 V8 received Renntech headers and a custom dyno tune. The result? On a Dynojet in STD correction a peak of 562 wheel horsepower was hit. This is 37 wheel horsepower over the baseline of 525 wheel horsepower. In SAE correction on the Dynojet the peak figures change to 547 wheel horsepower for a gain of 34 wheel horsepower over the 513 wheel horsepower baseline.

      Those are some very nice gains from a motor AMG pushes pretty far past the standard SLS AMG which itself features a more highly strung version of the M156 V8 seen in 63 AMG models known as the M159. Especially considering the Renntech headers still retain cats. 562 naturally aspirated horsepower is incredibly impressive in of itself as is squeezing more power out of the over 100 horsepower per liter M159 Black Series motor.

      Dynographs and a video of the Black Series that will provides eargasms below.





      This article was originally published in forum thread: 2014 RENNtech SLS Black Series M159 enjoy! started by m54b25 View original post
      Comments 44 Comments
      1. SLS AMG's Avatar
        SLS AMG -
        Click here to enlarge Originally Posted by LZH Click here to enlarge
        Um, yeah...you did.



        If you had asked. "Can you tune your tranny for more top end speed" then that might have made sense. But you mentioned the word "RATIO", which makes no sense whatsoever.
        Well I think you understand exactly what I meant!

        drive ratio can not be changed in an AMG without a software change in the TCU
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SLS AMG Click here to enlarge
        drive ratio can not be changed in an AMG without a software change in the TCU
        I don't think this is necessarily accurate. It depends on the application.

        For something like an SLS which is rear wheel drive I do not see why you could not change the final drive. What would need to be changed in the TCU and why?

        Usually it's an ECU change if anything to address RPM concerns when downshifting and the car might think you are at a different MPH so you could overrev potentially. With modern ECU's this is all calculated on the fly so really it doesn't matter.

        Changing a final drive doesn't affect anything inside the transmission.
      1. LZH's Avatar
        LZH -
        Click here to enlarge Originally Posted by SLS AMG Click here to enlarge
        Well I think you understand exactly what I meant!

        drive ratio can not be changed in an AMG without a software change in the TCU
        dude I don't understand about half of what you post, and again, you are wrong about ratio changes needing software changes as @Sticky pointed out. Every application is different and since the SLS DCT is being discussed here where no one has made a ratio change your comments are way off base.
      1. JRCART's Avatar
        JRCART -
        Actually you are all kinda right and wrong. The SLS BS does indeed have a shorter final drive than an SLS or SLS GT, Sticky is 100%. However top speed is not limited by the final drive it is limited by aero drag. My brother recently drove my SLS BS from Dallas to California to get it out there for the Optima event and he got the car going 212 and it was still pulling hard he said but he was coming up on traffic and had to get out of the gas. Keep in mind when I could not break 200 I was just running an ECU tune, now I have the stage 3 which is making almost 200hp more than stock. Based on some rough calculations I suspect the car can go 219-221mph. If I pulled the wing off the back I bet is goes 230mph