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    • Early BMW S58 JB4 tuning results with a F98 X4 Competition on E28 ethanol blend running an 11.28@121.59 1/4 mile

      Not yet convinced the BMW M S58 motor is a beast? The tuning for the platform is in its infancy as the S58 motor literally is just hitting the streets. Despite that, the platform is knocking on that 10-second door with just a JB4 and some ethanol.


      At 6000+ DA (density altitude) no less. These will eventually run 10's with a tune and race gas.

      Keep in mind this is a 4500+ pound SUV:


      This thing is a rocket!

      A JB4 + E85 and the G80 M3 will be in the 10's. Go ahead, save this post to reference as it is going to happen.

      This article was originally published in forum thread: Early BMW S58 JB4 tuning results with a F98 X4 Competition on E28 ethanol blend running an 11.28@121.59 1/4 mile started by Sticky View original post
      Comments 8 Comments
      1. 1Mean1M's Avatar
        1Mean1M -
        This Thing will fly in the next phases of tuning
      1. spool twice's Avatar
        spool twice -
        it's definitely already a 10 second car based on that D/A alone. I prediect 10.8@125mph,

        Just think of when flash tunes will be available for full E85, the X3M/X4M's will be a beast (and so will the G-series M3/M4)
      1. Stevenh's Avatar
        Stevenh -
        Very impressive. OEM performance is evolving so quickly these days that it is really making it hard to justify upgrading older platforms.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        Very impressive. OEM performance is evolving so quickly these days that it is really making it hard to justify upgrading older platforms.
        Seriously.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by spool twice Click here to enlarge
        it's definitely already a 10 second car based on that D/A alone.
        I definitely agree.

        I just wonder what the trans will take.
      1. 7plagues's Avatar
        7plagues -
        Just hit 10s today, 10.8@126 or something with 5700ft DA.... E38 car is a beast.
      1. Stevenh's Avatar
        Stevenh -
        Click here to enlarge Originally Posted by 7plagues Click here to enlarge
        Just hit 10s today, 10.8@126 or something with 5700ft DA.... E38 car is a beast.
        Lol. Jesus. I'm going to have to trade in my go fast car and get another SUV to go fast.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        Lol. Jesus. I'm going to have to trade in my go fast car and get another SUV to go fast.
        I might have to get a G80...