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    • ShifTech X253 Mercedes-AMG GLC63 S M177 E85 flex fuel tune results - 200+ lb-ft torque increase

      Interesting to see ShifTech is claiming to offer E85 flex-fuel tuning for the M177 V8 in the Mercedes-AMG GLC63. They apparently are doing this on the factory ECU based on their claims which certainly is impressive tuning ability.


      The results on ethanol are huge gains.

      ▪️ Annoncé par le constructeur : 510ch | 700Nm
      ▪️ Mesuré origine : 511ch | 650Nm
      ▪️ Reprogrammation ShifTech : 620ch | 930Nm !


      Over 100 horsepower picked up and look at the torque gain from 3000-5000 rpm! Peak torque goes from 479 lb-ft stock to 686 lb-ft. An increase of 207 lb-ft of torque!

      Obviously the M177 responds well to E85 tuning and flex-fuel ability is nice to have for those with E85 stations.

      This article was originally published in forum thread: ShifTech X253 Mercedes-AMG GLC63 S M177 E85 flex fuel tune results - 200+ lb-ft torque increase started by Sticky View original post
      Comments 3 Comments
      1. MR747's Avatar
        MR747 -
        Id love them to open bonnet and show us the flex sensor
      1. billvp's Avatar
        billvp -
        On another site, posters claim that Eurocharged is offering ethanol tuning for the m157 but it doesn't seem to be true flex fuel but instead is a tune for a fixed ethanol content. I wonder if this is similar.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by billvp Click here to enlarge
        On another site, posters claim that Eurocharged is offering ethanol tuning for the m157 but it doesn't seem to be true flex fuel but instead is a tune for a fixed ethanol content. I wonder if this is similar.
        Eurocharged does E85 tunes but the tune is for the particular ethanol blend as you stated.

        This is indeed claimed to be flex-fuel by ShifTech although as stated they have not shown how they are determining ethanol content:

        Click here to enlarge Originally Posted by ShifTech Click here to enlarge
        Reprogramming engine Flex + on this Mercedes GLC 63 AMGs

        ▪️ Announced by the manufacturer: 510ch | 700nm
        ▪️ Measured origin: 511ch | 650nm
        ▪️ Reprogramming ShifTech: 620ch | 930Nm!

        The E85 Flex + preparation combines engine reprogramming and E85 flex-fuel conversion. You will therefore recover a more efficient vehicle that can run on E85 * fuel or gasoline.

        * E85 is available in France for a price of about 0.60 € / L