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Thread: E21 swap help.

  1. #1
    Join Date
    Mar 2018
    Location
    Westminster, Maryland
    Posts
    10
    My Cars
    E21 1983 320i m10b18

    E21 swap help.

    Hello, I have a 1983 320is that I wanna swap. My preferred method would be pop an m42 that I would build and turbo it before I throw it in. But any other ideas or methods of swaps would be great. As long as all the big v8’s stay out of this. I want to keep it a 4 banger with a turbo setup. Thanks

  2. #2
    Join Date
    Oct 2015
    Location
    RI
    Posts
    1,052
    My Cars
    1983 320is S52/2003 VR6T
    sr20det

  3. #3
    Join Date
    Nov 2007
    Location
    Sacramento, California
    Posts
    4,704
    My Cars
    1980 BMW 320i E21 M10B18

    Cool

    E30 318IS M42 Turbo - Stock Internals


    https://www.bimmerforums.com/forum/s...tock-Internals


    Randy

  4. #4
    Join Date
    Oct 2018
    Location
    Burbank, CA
    Posts
    5
    My Cars
    2014 911S
    Been quoted $20-30k for a F20C swap (Honda S2000 engine & Box)


    Sent from my iPhone using Tapatalk

  5. #5
    Join Date
    Mar 2016
    Location
    Bentonville, AR USA
    Posts
    497
    My Cars
    91 318is - 83 320is
    Personally I would just do the m42. It's been done before, drops in with minimal modifications, and is a good fit. Plus even on stock internals and headgasket you can run around 10 psi with good usable power.

    With that said, a nice k24 using Kmiata trans adapter to a Getrag would be a sweet setup. I think you are going to run into oil pan mods, custom intake stuff, header, engine management, etc. which end up being possibly both expensive and labor intense. I recommend watching Speed Academy videos on their 240sx Kswap to get a good idea of just how much will be required. I'm fairly sure the front subframe issues they ran into will be pretty similar to an e21. Kmiata is currently putting together a kit to fit the e30 chassis, so I think a lot of what they put together for it "may" work for the e21.

    An f20c would be sweet as well like mentioned above, but they are just so expensive of a donor.
    91 318is
    83 320is

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