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    • Renntech tuned 750 horsepower C218 CLS63 AMG takes on a 730 horsepower Heffner tuned Ford GT

      Now we are just going by the horsepower figures given in the video as we do not have any dynos to accompany the claims. However, they both are likely accurate due to the result of the race. The CLS63 AMG is able to hang right with the tuned Ford GT and if the race went further it looked like it could pull slightly up top. We do not know the exact list of modifications on either car but the CLS63 obviously has Renntech software and the Ford GT is likely running a pulley, exhaust, and tune from Heffner. Regardless, very impressive result for the CLS63 AMG against stout competition.



      This article was originally published in forum thread: Renntech tuned 750 horsepower C218 CLS63 AMG takes on a 730 horsepower Heffner tuned Ford GT started by Sticky View original post
      Comments 14 Comments
      1. SLS AMG's Avatar
        SLS AMG -
        CLS63 was keeping up pretty good. The question , is that Ford GT really 750 HP?
      1. Sledgehammer's Avatar
        Sledgehammer -
        750 in the GT seems low but in any case that a modded CLS is with a modded GT at all is amazingly impressive considering the weight disparity. I would like dyno numbers on both cars!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sledgehammer Click here to enlarge
        I would like dyno numbers on both cars!
        Same here, or at the very least a detailed mod list.
      1. ultimateendz's Avatar
        ultimateendz -
        are these whp or crank hp numbers?....im assuming crank
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ultimateendz Click here to enlarge
        are these whp or crank hp numbers?....im assuming crank
        Definitely crank.
      1. ultimateendz's Avatar
        ultimateendz -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Definitely crank.
        do we have any 700whp cars here now?
      1. Jake@Eurocharged.com's Avatar
        Jake@Eurocharged.com -
        very cool! The gt is no joke, but you know I have never seen one lightly modded lol. All the ones we play with and run at the shop are all supercharged....(gotta love texas)
      1. oddjob2021's Avatar
        oddjob2021 -
        Click here to enlarge Originally Posted by Jake@Eurocharged.com Click here to enlarge
        very cool! The gt is no joke, but you know I have never seen one lightly modded lol. All the ones we play with and run at the shop are all supercharged....(gotta love texas)
        ? ... the ford gt comes with a supercharger stock. the real big boys put a pair of hairdryers on and make 1000+ wheel.
      1. Jake@Eurocharged.com's Avatar
        Jake@Eurocharged.com -
        Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
        ? ... the ford gt comes with a supercharger stock. the real big boys put a pair of hairdryers on and make 1000+ wheel.
        Meant to say turbo lol. I have yet to see one with under 1300whp....I will try and find pics. One of our customers has a FEW of them....
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ultimateendz Click here to enlarge
        do we have any 700whp cars here now?
        I do not know of any 700 whp m157's yet.
      1. sneakyneon's Avatar
        sneakyneon -
        amazing video! I would think there would be a big differance in weight??
      1. LZH's Avatar
        LZH -
        Seemed to me the only reason the CLS kept up was because the FGT lost so much ground during each shift then gained it back pretty quickly only to lose ground again for the next shift. True manual transmissions simply cannot keep up with these new gearboxes like the MCT's, DSG's, PDK's etc...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by sneakyneon Click here to enlarge
        amazing video! I would think there would be a big differance in weight??
        It is a fairly big weight difference but the CLS has an absurd amount of torque.
      1. onurleft's Avatar
        onurleft -
        AMS made 550/700 on an E63 with just a dyno calibration. I'd assume this one has that and bolt on's (exhaust), which means (assuming the hp/tq climbs at similar ratio) this car is making over 800ft/lbs of torque (crank).
        I'd assume the GT is header/pulley/tune.

        Also, one cannot asses this car can't keep up because of the transmission without knowing how it was shifted/who drove it and what it would do with better shifting.