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Thread: V10 s85 e31

  1. #1
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    V10 s85 e31

    I've been toying with the idea of buying an E60 M5 for a weekend toy. After test driving one, I loved the engine / 7 speed SMG setup but wasn't at all keen on the body.

    I figure an E31 is a little lighter than an M5 and much better looking!

    Watch this space :-)

  2. #2
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    It’s not lighter and you won’t swap it.

  3. #3
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    Quote Originally Posted by killian665 View Post
    It’s not lighter and you won’t swap it.
    You're a real joy! It has been swapped but it would be a major PITA. Basically put an E31 shell on a complete E60! But it can be done if you have time and lots of $$$.

  4. #4
    Join Date
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    BMW 850
    This oś being Done in Poland also

  5. #5
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    1992 E31 850i
    Go for it -- I love interesting swaps. It's the other end of the spectrum from what you're talking about, but I've said around here before that I'd probably enjoy an E31 with a modern straight-six turbodiesel more than I would enjoy a CSi.

    Cheers, John

  6. #6
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    Quote Originally Posted by killian665 View Post
    It’s not lighter and you won’t swap it.
    weight according to BMW 850I 1790KG .....E60 M5 1855KG

    I won't swap it? Ok thanks for letting me know that .

    - - - Updated - - -

    Quote Originally Posted by jeffbebe View Post
    You're a real joy! It has been swapped but it would be a major PITA. Basically put an E31 shell on a complete E60! But it can be done if you have time and lots of $$$.
    Obviously he attempted a swap once and failed lol.

    It won't be that difficult, I know some very good fabricators.. the electronics are no problem for me nor is any of the mechanical work.

  7. #7
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    Omega,

    It is because not everyone know the builds that you have done in the past. If anyone is going to do it, it is you! Subscribed.


    Quote Originally Posted by Omega man 1969 View Post
    weight according to BMW 850I 1790KG .....E60 M5 1855KG

    I won't swap it? Ok thanks for letting me know that .

  8. #8
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    Quote Originally Posted by alex840 View Post
    Omega,

    It is because not everyone know the builds that you have done in the past. If anyone is going to do it, it is you! Subscribed.
    :-)) true. I'm on the hunt for a complete car, preferably one that's had a shunt with a good engine and box. I'm going to need the SMG controller and engine DME/wiring...that's if I don't go the manual route and fit an E90 6 speed box.

    - - - Updated - - -

    I usually go few years mixed up with a crazy woman.....followed by a single period of a few years of crazy car building........lets just say I'm due a car build :-))

  9. #9
    Join Date
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    I usually go few years mixed up with a crazy woman.....followed by a single period of a few years of crazy car building........lets just say I'm due a car build :-))[/QUOTE]

    Now I have faith

  10. #10
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    Quote Originally Posted by Omega man 1969 View Post
    I usually go few years mixed up with a crazy woman.....followed by a single period of a few years of crazy car building........lets just say I'm due a car build :-))
    ROFL. Good one. Subscribed as well.

  11. #11
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    750 F01, 850i, LR3 HSE

    E31s85

    Posted before, conversion done by Motorcade Motorsport. All pictures and videos are on their Facebook Page, the car sounds wonderful!

    Not a simple conversion but they pulled it off. Subframe, chassis rails, strut towers, modified hood, this conversion is not for the faint of heart.

    You can use the 6 speed gearbox from the M3, it is a direct fit, been there done that.

    Cheers!

    https://www.facebook.com/MotorCadeMo...7437855034969/


    e31s85.jpg
    e31s852.jpg
    E31S853.jpg
    Last edited by mandd; 04-11-2018 at 12:53 PM.

  12. #12
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    ...geez. Crazy build. What's left of the E31 is just its shell.

    Looked through the rebuild pictures...wow! Not even going to guess how much that cost.

    https://www.facebook.com/pg/MotorCad...11923562253068

  13. #13
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    1991 850i S70 6 speed
    OMG!!! beautifully done.

  14. #14
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    1994 850CSi, 2007 M5
    e60 e31 side.jpg
    Quote Originally Posted by Omega man 1969 View Post
    I've been toying with the idea of buying an E60 M5 for a weekend toy. After test driving one, I loved the engine / 7 speed SMG setup but wasn't at all keen on the body.

    I figure an E31 is a little lighter than an M5 and much better looking!

    Watch this space :-)
    Weekend toy? Mine is my DD and it's a blast every single time I get behind the wheel! The looks of the vehicle will grow on you as it has me, as I am of the same opinion as you are, regarding its' exterior aesthetics.
    1994 850CSi, 2007 M5, 1990 VW Westy Syncro, 2010 e61 Touring Manual

  15. #15
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    Nice job !! 👍🏻

    I wouldn’t change the e31 suspension though, it’s actually a very good setup. Upgraded diff with LSD will support 500 HP all day . The engine bay/transmission tunnel will be a lot work though.



    Quote Originally Posted by mandd View Post
    Posted before, conversion done by Motorcade Motorsport. All pictures and videos are on their Facebook Page, the car sounds wonderful!

    Not a simple conversion but they pulled it off. Subframe, chassis rails, strut towers, modified hood, this conversion is not for the faint of heart.

    You can use the 6 speed gearbox from the M3, it is a direct fit, been there done that.

    Cheers!

    https://www.facebook.com/MotorCadeMo...7437855034969/


    e31s85.jpg
    e31s852.jpg
    E31S853.jpg

  16. #16
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    Maybe in silverstone blue, not at all keen on black ones...dark colours seem to hide all the M bulges 😀 . Have you had any issues with it ?




    Quote Originally Posted by Major Cheese View Post
    e60 e31 side.jpg

    Weekend toy? Mine is my DD and it's a blast every single time I get behind the wheel! The looks of the vehicle will grow on you as it has me, as I am of the same opinion as you are, regarding its' exterior aesthetics.
    Last edited by Omega man 1969; 04-12-2018 at 04:38 PM.

  17. #17
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    I picked it up about 15 months ago with only 52k miles on it from Chicago Motor Cars here in Las Vegas. They bought it at auction, so they didn't have any history on the vehicle other than a clean car fax. Because it was through a dealer, I was able to get a warranty as advised by my local independent shop. Even though the car has been solid it was and is a "piece of mind" price worth paying. I've had several oil changes with oil analysis on every change and no indications of rod bearing failure.

    It's taken me a while to get accustom to the SMG. I've learned to accept it more since driving my son's e61 manual for a month as a DD. I love shifting it (M5) with the shifter or even more so with the paddles and not having to push in a third pedal.
    1994 850CSi, 2007 M5, 1990 VW Westy Syncro, 2010 e61 Touring Manual

  18. #18
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    Quote Originally Posted by Major Cheese View Post
    I picked it up about 15 months ago with only 52k miles on it from Chicago Motor Cars here in Las Vegas. They bought it at auction, so they didn't have any history on the vehicle other than a clean car fax. Because it was through a dealer, I was able to get a warranty as advised by my local independent shop. Even though the car has been solid it was and is a "piece of mind" price worth paying. I've had several oil changes with oil analysis on every change and no indications of rod bearing failure.

    It's taken me a while to get accustom to the SMG. I've learned to accept it more since driving my son's e61 manual for a month as a DD. I love shifting it (M5) with the shifter or even more so with the paddles and not having to push in a third pedal.
    Yeah I hear they have rod bearing issues but I wasn't sure if this was internet hype or not. Apparently BMW changed the big end shells for a revised version followed by a change in oil to 10w60. It seems that some rod journals have out of spec size bores.....bit of pot luck when it comes to mileage, some do 140,000 no problems whilst others barely make it to 50,000 miles. I think the only way to know for sure is to pull the sump off and measure everything then rebuild with suitably sized bearings.

  19. #19
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    '01 M5 '82 320i
    So crazy to see this thread. I was thinking of doing something crazy like this. But after seeing the amount of work and $$$, forget it. I'd much rather stick an S52 in there and turbo charge it. Any ideas on that front?

  20. #20
    Join Date
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    93 850, 06 M5, 07 B7
    I got 227K out of my 93 850ci M70 engine ! and was thinking of and engine swap since I have not been able to find a decent used one or a shop willing to rebuild my existing engine.

    - - - Updated - - -

    I got 227K out of my 93 850ci M70 engine ! and was thinking of and engine swap since I have not been able to find a decent used one or a shop willing to rebuild my existing engine.

  21. #21
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    Yeah I hear they have rod bearing issues but I wasn't sure if this was internet hype or not. Apparently BMW changed the big end shells for a revised version followed by a change in oil to 10w60. It seems that some rod journals have out of spec size bores.....bit of pot luck when it comes to mileage, some do 140,000 no problems whilst others barely make it to 50,000 miles. I think the only way to know for sure is to pull the sump off and measure everything then rebuild with suitably sized bearings.

    It's all here on the ARP site, looked in to this a couple of years back, basically low rod/bearing clearances.
    https://arperformance.co.uk/bmw-m3-m...5-bearings-uk/

  22. #22
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    1994 E31 850CSi
    I've heard it's the SMG that gives a lot of trouble, but the US got a manual version, right?
    Current:
    1994 E31 850CSi Sterlingsilber/Anthracite Buffalo

    Previous:
    1987 E28 M5 Delphin
    1986 E23 M745iA Arctic Blue
    1986 E24 635CSi Polaris
    1976 E3 3.0 Si Arctic Blue

  23. #23
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    Quote Originally Posted by kiwiCSi View Post
    I've heard it's the SMG that gives a lot of trouble, but the US got a manual version, right?
    For the M6, 696 manuals (coupes and convertibles) for USA and Canada.
    For the M5, 1358 manuals for USA and Canada.
    2006 R53 JCW (British Racing Green) - 1994 E31 840Ci 6spd (AVUS Blue)
    2021 F56 JCW (Rebel Green) - 2000 E38 740i Sport (Titanium Silver)
    2017 F26 X4 M40i (Carbon Black) - 2007 E91 328iT (Deep Green)
    2012 E82 135i M Sport (Marrakesh Brown) - 2015 E84 X1 (Cashmere Silver)
    2005 E53 X5 3.0i Sport (Kalahari Beige) - 2000 E36/7 M Roadster (Oxford Green)
    2000 E38 740i Sport (Oxford Green) - 1999 E36 M3 Coupe (Fern Green)
    1995 E31 840Ci Canadian (Oxford Green) - 2000 E36/8 M Coupe (Oxford Green)
    2004 E46 330Ci (Oxford Green) - 2001 E36/8 Z3 3.0i Coupe (Oxford Green)
    2002 E39 525i Sport (Oxford Green) - 2002 E36/7 M Roadster (Oxford Green)
    2001 E53 X5 3.0i Sport (Oxford Green) - 2007 E63 M6 (Silver Grey)
    1995 E31 840Ci (Oxford Green) - 2006 E86 M Coupe (Sepang Bronze)
    2001 E39 530i Sport (Aspen Silver) - 2009 E92 M3 (Space Grey)
    2001 E38 740i Sport (Sahara Beige) - 2008 E92 M3 (Melbourne Red)
    2000 E38 740i Sport Canadian (Sahara Beige) - 1997 E31 850Ci (Jet Black)

  24. #24
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    Hello guys. Been toying with the idea as well as I've just got a 850i with a M60B40 in it. Swap done by a previous owner who couldnt deal with the V12.

    Now, I've been thinking about a S62 swap, but the S85 is kinda interesting too.

    Would the engine bay not fit the V10 in there since it was designed for the V12? Why was the project done by Motor Cade above involves a lot of chassis hacking?

    Also I hear a manual box from an M3 fits, I'm guessing from E46 M3?

  25. #25
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    DE302AE7-D8AB-4890-8D82-71C7A5BC56B6.jpg And I've been tempted to go the other way.....A M70 in this 530xi! No way I have the time.

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