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Thread: Build yourself an S50B30 clone for cheap!!! DIY

  1. #1
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    3.0L beast

    Cheap S50 would be M50 engine with M54B30 rotating assembly plus S50/S52 camshafts and you got yourself a 3.0L beast. All parts fit just fine, no machining required.

    Here is my video explaining the details: https://www.youtube.com/watch?v=VT5v6CrGStg


    If you need engine computer for the beast, visit this thread: http://forums.bimmerforums.com/forum...-99-E36-MS41-1

    Update 2015.
    Last edited by hakentt; 11-03-2015 at 04:07 AM. Reason: new information 2015

  2. #2
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    So is he engine in a chassis and running? This shit looks pretty epic man, thumbs up

  3. #3
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    install that baby and dyno that monster.... great work...you should start thinking about building some and sell them...heck, if it makes more power than s50/52, i'll pay 2k for it...

  4. #4
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    edit
    Last edited by hakentt; 06-25-2014 at 12:44 AM. Reason: OBD2 information added

  5. #5
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    Great build...and ballsy for reusing rings, bearings and even seals . Out of curiousity when you sand the block deck with sandpaper and water, were you not afraid of the immediate occuring of rust? water into cylinder walls?

  6. #6
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    edit
    Last edited by hakentt; 06-25-2014 at 12:44 AM. Reason: new info

  7. #7
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    FYI, you are correct OP
    M54B30 crank = S52 crank (forged)
    notice I underlined the B30 part...other M54 have a different crank

    good work

    also, at 10.5:1 CR, 87 will work fine with no detonation..........VR6 engines have seen over 300k miles on 87oct at 10.5:1 stock compression ration
    Last edited by das borgen; 09-16-2011 at 07:53 AM.

  8. #8
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    nice writeup.. im gunna think about it... what kind of power u making now

  9. #9
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    So you put m54 pistons in an m50 block?? Which crankshaft did you use? Why didn't you just use the m54 block?

    I didn't even know this could be done. This is sick..

  10. #10
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    Wow nice right up. Maybe on my list of what i want to do with my car.

  11. #11
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    Quote Originally Posted by Kody View Post
    So you put m54 pistons in an m50 block?? Which crankshaft did you use? Why didn't you just use the m54 block?

    I didn't even know this could be done. This is sick..
    The M54 is really hard to fit in an e36.

    Sounds like he bought a core m54 short block that was in good shape, removed the crank, rods & pistons and installed in the m50 block. Then cleaned up and resold the leftover m54 block.
    David M.
    '96 328 Sedan

  12. #12
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    Oh my god... If I had the money and skills to do this, I would. Interesting DIY, must keep this in mind.

  13. #13
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    How much was the block? I can't find one for less than $1000.00

  14. #14
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    Quote Originally Posted by cjsdad1 View Post
    How much was the block? I can't find one for less than $1000.00
    http://forums.bimmerforums.com/forum....php?t=1714300

  15. #15
    Join Date
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    any different in terms of performance if using S50b30 86mm inner assembly compare to M54B30 84mm?

  16. #16
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    Could this also be done with an M52B25 or M52B28 block?
    Semper Fidelis

    H&R /// Koni /// Powerflex /// AKG
    My 3.46 LSD Build Thread

  17. #17
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    yes

    Quote Originally Posted by orangehatter View Post
    Could this also be done with an M52B25 or M52B28 block?

  18. #18
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    Hey, I've been reading about m50 strokers for quite a few months now. Compared with the lack of information about m50 strokers out there, I really respect this project (especially for being on a budget like this). Really, really awesome work man, thanks for sharing it.

  19. #19
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    Quote Originally Posted by orangehatter View Post
    Could this also be done with an M52B25 or M52B28 block?
    project time, Evan?

    I'm always game

  20. #20
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    Quote Originally Posted by das borgen View Post
    project time, Evan?

    I'm always game
    If I had a second vic to drive while the 323is was down, then yes...
    Semper Fidelis

    H&R /// Koni /// Powerflex /// AKG
    My 3.46 LSD Build Thread

  21. #21
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    can this be done to NV motors?

  22. #22
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    Quote Originally Posted by revmoo View Post
    can this be done to NV motors?
    Yeah it can. Just don'e expext as much power as a Vanos motor becuase they could have the S50/52 cams.

    But NV is so much better....lol

  23. #23
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    Quote Originally Posted by orangehatter View Post
    Could this also be done with an M52B25 or M52B28 block?

    I think the M52B28 has a wider bore, but as far as I know the M52B25 is exactly the same bore and stroke so it should work.

    Edit: Just looked it up, M52B28 has same bore but longer stroke than M50B25/ M52B25, so this should work for all of them.

    Okay, new question, does an M52TUB25 head fit on an M50TUB25 block?. I'm wondering if it is possible to do make a 3.0 stroker with dual Vanos, but keep that good old bullet/ turbo proof iron block.
    Last edited by milestrail; 09-19-2011 at 11:31 PM. Reason: Automerged Doublepost

  24. #24
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    Wow, glad i caught this, very simple and cheap.

  25. #25
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    Tag

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