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    • JB4 tuned BMW F80 M3 with downpipes on E85 vs. stock Hellcat and Ferrari 458 Italia

      A bolt on F80 M3 or F82 M4 is a potent thing. This F80 M3 has a BMS JB4 tune on Map 2 and is running an E85 blend. Additionally, the car has catless downpipes and an intake. The Hellcat is an 8-speed automatic that is completely stock.


      The F80 M3 handles it well and pulls decisively. Impressive for sure.


      Now, before the M3 got downpipes and other bolt ons it ran a Ferrari 458 Italia with just the JB4 and an intake on pump gas. It does not take much to make an F80 M3 stout:


      This article was originally published in forum thread: JB4 tuned BMW F80 M3 with downpipes on E85 vs. stock Hellcat and Ferrari 458 Italia started by Sticky View original post
      Comments 16 Comments
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        BAHAHAHAHAHA. The hell cat had to roll up his window to get rid of the hideous sound of the S55 exhaust. Love it
      1. Zombie1's Avatar
        Zombie1 -
        Click here to enlarge Originally Posted by Tony@VargasTurboTech Click here to enlarge
        BAHAHAHAHAHA. The hell cat had to roll up his window to get rid of the hideous sound of the S55 exhaust. Love it
        😂 tony is right, worst sounding turbo I6 BMW ever. Still a stout powerhouse.
      1. Bowser330's Avatar
        Bowser330 -
        Damn impressive that the M3 hung with a F458 with only ~$2K in modifications....
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        Damn impressive that the M3 hung with a F458 with only ~$2K in modifications....
        Well it's a turbo motor. Honestly, the 458 engine is far more impressive IMO.

        I get what you're saying though about a performance value.
      1. Andrew@activeautowerke's Avatar
        Andrew@activeautowerke -
        hell cat race doesnt add up to me and i have the same mods.

      1. subaru335i's Avatar
        subaru335i -
        Click here to enlarge Originally Posted by Andrew@activeautowerke Click here to enlarge
        hell cat race doesnt add up to me and i have the same mods.

        https://www.youtube.com/watch?v=9qfLhBcp0Z0
        What doesnt add up? The Charger in the original video is like 150 lbs heavier than the Challenger you raced.
      1. Andrew@activeautowerke's Avatar
        Andrew@activeautowerke -
        Video i posted is a 650whp pure stage 2 car.
      1. subaru335i's Avatar
        subaru335i -
        Click here to enlarge Originally Posted by Andrew@activeautowerke Click here to enlarge
        Video i posted is a 650whp pure stage 2 car.
        OH I see the OP video is supposed to be just downpipes on stock turbos and it walked away from the hellcat.
        Was the M3 in the video you posted a manual or DCT?
      1. Andrew@activeautowerke's Avatar
        Andrew@activeautowerke -
        not sure. But doesn't seem like its having any transmission lag so ill go with dct.
      1. 07Tundra's Avatar
        07Tundra -
        In the F80 race what key was the Helkitten using? there are 2 different keys.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 07Tundra Click here to enlarge
        In the F80 race what key was the Helkitten using? there are 2 different keys.
        Nobody is going to race on the valet/wife key.
      1. 07Tundra's Avatar
        07Tundra -
        Well it depends if the vid was setup or not
      1. Newguy123's Avatar
        Newguy123 -
        Click here to enlarge Originally Posted by Andrew@activeautowerke Click here to enlarge
        not sure. But doesn't seem like its having any transmission lag so ill go with dct.
        That kitten you posted may have mods lol... They gain a lot of power with simple mods that aren't that easy to spot unless you know what to look for. A 650whp ps2 S55 would $#@! all over a stock hellcat
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Newguy123 Click here to enlarge
        A 650whp ps2 S55 would $#@! all over a stock hellcat
        A stock hellcat is no joke. I think you mean an aggressively tuned Pure Stage 2. It won't win on pump gas either.
      1. Newguy123's Avatar
        Newguy123 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        A stock hellcat is no joke. I think you mean an aggressively tuned Pure Stage 2. It won't win on pump gas either.
        idk if I'm beating stock cats in my 500 whp dct 135i with ease I think an s55 with PS2s would dump all over one.nothing suprises me anymore though bc some guys totally bs on whats done to their car and how much power its really making
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Newguy123 Click here to enlarge
        idk if I'm beating stock cats in my 500 whp dct 135i with ease I think an s55 with PS2s would dump all over one.nothing suprises me anymore though bc some guys totally bs on whats done to their car and how much power its really making
        Your 135i is also lighter and yet you did win if I recall in a recent video.

        It's hard to tell what to believe as we have vids of two cars showing different outcomes. Tuning alone is a huge variable.

        We saw a car on OEM turbos recently trap 124. This can range greatly too.