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My friends at Mancuso Motor Sports found a 2015 Mercedes S65 AMG Coupe sitting at an auction lot. The car had an original MSRP Of $250,000 and it was modified by RennTech. They claim this car has about 670 horsepower and 840 lb-ft of torque so I drove this monster to the dyno for some testing. While we were there we tuned my 2003 E55 AMG for the most power it's ever made! This was an epic dyno battle between a big money Twin Turbo V12 Renntech S65 and a cheap, DIY budget E55 AMG. The S65 is also straight piped and my E55 just had C63 AMG muffler installed so turn the volume up on this one.
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By Alex

14 thoughts on “Crazy auction find! $250k straight piped renntech s65 amg coupe! dyno battle vs my cheap diy e55 amg”
  1. Avataaar/Circle Created with python_avatars Brian Jewell says:

    The M276 is my dream motor, but looking at it all realistically… the M157 is the beast of beasts. Chesper. More power and torque to make easily. And better support from the aftermarket.

    All things being equal im going with a 65 amg for the glory of V12TT. But damn this puts the M157 in perspective as a true animal

  2. Avataaar/Circle Created with python_avatars Auto Life says:

    Alex its my dream to get to meet you one day! Drinks on me🎉 your videos have guided me with so much amazing information. Keep it up!

  3. Avataaar/Circle Created with python_avatars Troy McLore says:

    Thats the guy who builds the Zonda engines.
    He is the top engine builder at AMG

  4. Avataaar/Circle Created with python_avatars jpogi gtxcr1 says:

    Newer torque converter type transmissions are gaining ground again.

    The mass produced 10r80 used by the Mustang/F150 shifting is fast.

  5. Avataaar/Circle Created with python_avatars Hola! Lighthouse® Outdoor Lighting says:

    I’m new. Is that dyno considered wheel horsepower and torque?

  6. Avataaar/Circle Created with python_avatars Brian Roldan says:

    What auction do dealerships shop at?

  7. Avataaar/Circle Created with python_avatars Dawid Balcerzak says:

    Random Samcrac lol definitely hitting like button bdw ❤that65

  8. Avataaar/Circle Created with python_avatars Gee says:

    Dude that engine was built by F1MIKE… iconic AMG tech!!

  9. Avataaar/Circle Created with python_avatars Greg Shepherd says:

    Bit late but this is bi-turbo, not twin turbo. I’m sure you already know but bi-turbo has 2 turbo’s of unequal size & twin turbo just has equal sized turbo’s. Cheers & an amazing car.

  10. Avataaar/Circle Created with python_avatars Chris Carlton says:

    That isn’t 250k

  11. Avataaar/Circle Created with python_avatars Michael Gakanga says:

    You didn’t just happen to get an S65 from auction with Renntech upgrades and an engine built by arguably the best AMG engine builder

  12. Avataaar/Circle Created with python_avatars øß_Se$$ioñ says:

    The way you described the acceleration is exactly why I sold my 2009 CL65. It’s an amazing car to drive and stunning look wise. Better looking than a lot of the new cars. They are timeless. However the acceleration is so Mercedes. Smooth and not aggressive. Some people may like that, but I like my accelerations brutal and violent. More like the BMW M6 does. So that’s the reason I sold mine. It’s for older people in my opinion who want to eat a black caviar on toast while doing 180 mph.

  13. Avataaar/Circle Created with python_avatars Pf Alweer says:

    Only 3 years to late😂

  14. Avataaar/Circle Created with python_avatars Carlos Oruna says:

    Renntec is a great tuner. Good connection to ag.

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