• Finally, a shot of the new N20B20 4 cylinder turbo motor in its entirety

      The vast majority of BMW blogs and sites on the net posted pictures of the N20 sitting in an engine bay with a plastic cover. That did not do much for us to be able to see the actual motor. Well, a shot of the motor has surfaced that also reveals the size of the intercooler. This is all we have so far but we are hoping more photos and details of the motor will surface soon.


      Twinscroll turbo diagram:


      Powerband:

      This article was originally published in forum thread: Finally a shot of the new N20B20 4 cylinder turbo motor in its entirety started by Sticky View original post
      Comments 46 Comments
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        lol was the twin scroll really necessary for such a small turbo. esp when its a 4 cylinder too haha. a very small intercooler as well. is it a 2 liter?
        compared to my gti... this is very interesting without a doubt.
        It isn't necessary, but definitely is a worthwhile thing for decreasing spool time.

        Wonder what the intake plumbing looks like. Hopefully this motor comes with beefy internals and lots of margin for tuning from the fuel system.
      1. DBFIU's Avatar
        DBFIU -
        IT'S GONNA BE RWD!!!
      1. DBFIU's Avatar
        DBFIU -
        The exhaust manifold seems to be well designed with individual primaries, probably for the twin scroll exhaust housing on the turbo. The intercooler is not that small for a 2 liter, its about the same size as the N54 IC hah...

        This thing looks like a mini N54, lot's of potential here.

        Click here to enlarge
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        This thing looks like a mini N54, lot's of potential here.

        Click here to enlarge
        what car are they planning to put this into?
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        what car are they planning to put this into?
        Every car with 28i code
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        Every car with 28i code
        damn, now i wonder maybe 328s with chip and downpipe can keep up with modded GTI's
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        damn, now i wonder maybe 328s with chip and downpipe can keep up with modded GTI's
        Yes , since it's based on N55 it has great potential for being modded , i'm thinking about +300HP or maybe more
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        Yes , since it's based on N55 it has great potential for being modded , i'm thinking about +300HP or maybe more
        crap man, i hope not that much! if i get an e46 m3 these new 328's will cream me Click here to enlarge... looks like i need HPF
      1. DBFIU's Avatar
        DBFIU -
        If this goes in the new 328, expect it to be the new entry level tuner car. Very nice!
      1. Ryan Mills's Avatar
        Ryan Mills -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        crap man, i hope not that much! if i get an e46 m3 these new 328's will cream me Click here to enlarge... looks like i need HPF
        Or just man up and get a 335! If I could do it all over again, I probably would wait for the 328, but the 335 is a beast, just doesn't get the mielage that Im used to. Makes me wonder how this new motor will compare to the upcoming Golf R....170Kw is 227 HP? I hope that's to the wheels!
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by Ryan Mills Click here to enlarge
        Or just man up and get a 335! If I could do it all over again, I probably would wait for the 328, it's fun to try stuff on new engines. Makes me wonder how it will compare to the upcoming Golf R....
        I'm looking for a 335 brotha. soo hard to find one round 20 grand.

        but yea new engines are always so much fun when upgrades come out for it.

        i dont think it has a chance with the golf R. its a k04!
      1. Ryan Mills's Avatar
        Ryan Mills -
        Sell a kindey, bam! an extra $5,000 to play with
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        crap man, i hope not that much! if i get an e46 m3 these new 328's will cream me Click here to enlarge... looks like i need HPF
        Go for E46 M3 and don't give a thing about 328/335, Performance isn't everything Click here to enlarge
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        Go for E46 M3 and don't give a thing about 328/335, Performance isn't everything Click here to enlarge
        true that.

        i want some more info on this engine tho haha. this is gonna be a new game for the bimmer world.
      1. Itsbrokeagain's Avatar
        Itsbrokeagain -
        this should be fun to mess with Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        The N20 vs. N54 battle is going to be a fun one to watch.

        I think this engine will be trapping 100 to begin with, should be uncomfortably close for the N54 fellows.
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The N20 vs. N54 battle is going to be a fun one to watch.

        I think this engine will be trapping 100 to begin with, should be uncomfortably close for the N54 fellows.
        trapping 100 is fast dude.. damn

        i still dont think it will be close to the n54 even with the same bolt ons. It will need a bigger turbo most likely, but I'm just rambling cuz im jealous....
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        trapping 100 is fast dude.. damn

        i still dont think it will be close to the n54 even with the same bolt ons. It will need a bigger turbo most likely, but I'm just rambling cuz im jealous....
        With bolt on's it will be faster than an N54 stock, no doubt about it.
      1. Sticky's Avatar
        Sticky -
        I expect this motor to dyno ~220. The N54 is around 270, so likely a 50 whp difference and 6 mph in trap speed. That is just my guess...
      1. DBFIU's Avatar
        DBFIU -
        I wonder what the internals can handle, block is probably stout. Would be nice to see 20+ psi on this thing with stock turbo and engine with just chip and meth, somewhere in the 320-350 whp range would be super fun in a 128i.