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Thread: M70B54 build

  1. #76
    Join Date
    May 2019
    Location
    Grovetown, GA
    Posts
    777
    My Cars
    1991 850i 6-speed
    Block surface cleaned to prepare for head install, and also cleaned the piston tops. This took way longer than expected, using CRC gasket remover, and when that ran out, acetone, on the old head gasket.

    The ring of carbon at the top of each cylinder partially, but not completely wipes off - the varnished remains will stay, unless there’s a reason, and a decent method to clean it off?

    At a full stop until I have a new thread chaser delivered, as my ARP M10x1.25 chaser will not fit the head bolt holes. Will order M10x1.5.

    Reinstalling the valley cover felt like positive progress at least.




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  2. #77
    Join Date
    Sep 2008
    Location
    Santa Barbara
    Posts
    3,462
    My Cars
    91 Dinan860 & 91 850 6sp
    the deck surface needs to be a lot cleaner than that...
    the carbon ring comes off with a red scotchbrite and more of the nasty CRC cleaner stuff...
    '91 Dinan 860 Stage III (new 6L engine)
    '91 Dinan 850 TT stage III (brand new engine) 21st Century Tech meets 18th Century Dinan...
    '91 850i 6sp (mint) (sold)
    '90 Dinan 750iL TT stage III (Guido - The Beast)
    '94 850 CSi The Detroit Auto Show car (restored to factory perfect) (sold)
    '96 850Ci, The George Carlin car
    ''73 3.0 csi, '08 535i, '03 X5 4.6is
    ...and a few other non BMW cars

  3. #78
    Join Date
    May 2019
    Location
    Grovetown, GA
    Posts
    777
    My Cars
    1991 850i 6-speed
    Thanks Cartoonz - the deck feels smooth to the touch, but doesn’t look clean. I guess I should spend another couple of hours on it - more of the evil CRC stuff on the way!


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  4. #79
    Join Date
    May 2019
    Location
    Grovetown, GA
    Posts
    777
    My Cars
    1991 850i 6-speed
    Using Cartoonz’ recommendation, I chased all 28 head bolt holes, then cleaned with brake fluid, and blew out with compressed air.

    There was a lot of detritus released, which didn’t go into the bores!


    After spending another couple of hours on the deck surface with more CRC gasket remover, it was time to bolt the heads back on. I was thoroughly sick of scrubbing and scraping, and ready to make some progress.



    I will have to hope that the initial 30nm torque value is reasonably accurate given the Amazon origins of my torque wrench.

    Subsequent 60degree torque angles were applied after 15 minute rest intervals using an angle gauge. In hind sight, I could have marked the angle out on some cardboard and saved some cash.



    It hould all be reassembly from this point on.
    Some light cleaning of the block, and then oil pans and timing cover installation.




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  5. #80
    Join Date
    Jun 2008
    Location
    SF Bay Area
    Posts
    3,778
    My Cars
    Supercharged 850ci
    Nice Job!
    Very labor intensive job for sure.
    Looks like you are making good progress!


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  6. #81
    Join Date
    Dec 2006
    Location
    Sunny Cali,
    Posts
    8,730
    My Cars
    6.5 second 69 Camaro
    Someone should build these for resale, IJS!...)

  7. #82
    Join Date
    Jun 2008
    Location
    SF Bay Area
    Posts
    3,778
    My Cars
    Supercharged 850ci
    Quote Originally Posted by 8eights View Post
    Someone should build these for resale, IJS!...)
    Thought about it, but its just so labor intensive, it would be quite expensive.
    Two options, m73 block, m70 ported and polished heads with Sora performsnce headers. And possibly Debilas cams.
    Another option is M73 heads and block with custom made downpipes.


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  8. #83
    Join Date
    May 2019
    Location
    Grovetown, GA
    Posts
    777
    My Cars
    1991 850i 6-speed
    Interesting - I hadn’t seen those headers before. A nice looking alternative to supersprint (cheaper?)


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  9. #84
    Join Date
    Jun 2008
    Location
    SF Bay Area
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    3,778
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    Supercharged 850ci
    Quote Originally Posted by petejk View Post
    Interesting - I hadn’t seen those headers before. A nice looking alternative to supersprint (cheaper?)


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    Cheaper and way better.

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  10. #85
    Join Date
    Jul 2008
    Location
    West Coast
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    2,730
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    two 3's one 5 three 7's
    Quote Originally Posted by dragon850 View Post
    Cheaper and way better.

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    Nice looking piece, it always makes me happy when I see performance parts still being made for these classics. How much cheaper are we talking here?

  11. #86
    Join Date
    Jun 2008
    Location
    SF Bay Area
    Posts
    3,778
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    Supercharged 850ci
    Quote Originally Posted by whiteghost1 View Post
    Nice looking piece, it always makes me happy when I see performance parts still being made for these classics. How much cheaper are we talking here?
    The cost is $1800 for the entire set up including down pipes and shipping.

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  12. #87
    Join Date
    Jul 2008
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    West Coast
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    two 3's one 5 three 7's
    Quote Originally Posted by dragon850 View Post
    The cost is $1800 for the entire set up including down pipes and shipping.

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    Thank you - that is an extremely reasonable price if they are as well made as they look!
    Do you think these provide noticeable gains if you are naturally aspirated?

  13. #88
    Join Date
    May 2019
    Location
    Grovetown, GA
    Posts
    777
    My Cars
    1991 850i 6-speed
    Schrick cams arrived today, a little over 3 months after I ordered them. This means I should be able have the engine completed this weekend with some luck and a tail wind.

    Timing looks to be the main hurdle, along with filing some material away from the alternator mount.


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  14. #89
    Join Date
    Jun 2008
    Location
    SF Bay Area
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    3,778
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    Supercharged 850ci
    Quote Originally Posted by petejk View Post
    Schrick cams arrived today, a little over 3 months after I ordered them. This means I should be able have the engine completed this weekend with some luck and a tail wind.

    Timing looks to be the main hurdle, along with filing some material away from the alternator mount.


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    Nice, where did you dig up the Schrick cams??

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  15. #90
    Join Date
    May 2019
    Location
    Grovetown, GA
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    777
    My Cars
    1991 850i 6-speed
    gladen-motorsport.de. The owner had Schrick make mine and a handful of other sets.


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  16. #91
    Join Date
    Dec 2013
    Location
    San Antonio
    Posts
    712
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    850,76 2002 &530,84 633
    Quote Originally Posted by dragon850 View Post
    Nice, where did you dig up the Schrick cams??

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    I am hoping he was able to order directly from Schrick. Maybe they are willing to produce them as needed.

  17. #92
    Join Date
    May 2019
    Location
    Grovetown, GA
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    777
    My Cars
    1991 850i 6-speed
    I’m not sure if this was a one off small batch, or a regular run they would do for certain off catalogue items


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  18. #93
    Join Date
    Jun 2008
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    SF Bay Area
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    Supercharged 850ci
    Quote Originally Posted by petejk View Post
    I’m not sure if this was a one off small batch, or a regular run they would do for certain off catalogue items


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    Schrick told me directly that they don't make anymore and never will cause no more blanks.
    And custom machine ones would be mega $$

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  19. #94
    Join Date
    May 2019
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    Grovetown, GA
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    1991 850i 6-speed
    Quote Originally Posted by dragon850 View Post
    Schrick told me directly that they don't make anymore and never will cause no more blanks.
    And custom machine ones would be mega $$

    Sent from my SM-G892U using Tapatalk
    It would be a shame to permanently lose a tuning option for the M70.

    Out of curiosity I emailed Gladen, and he still has a few sets left.


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  20. #95
    Join Date
    May 2019
    Location
    Grovetown, GA
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    777
    My Cars
    1991 850i 6-speed
    I laid out new lifters, rockers, and thrust adaptors, alongside the cams, and checked the torque spec needed to bolt the cams down.


    With the engine on the stand for now, I approximated TDC, then dropped in the new components, using Permatex Ultra Slick assembly lube at contact points.



    Not shown is the cam alignment tool, which I removed for the picture. The bolts securing the cam were torqued to 15 Nm and threadlocked, with the numbering running 1-7 front to back. Again, plenty of assembly lube was used.



    I will not be painting the engine, but decided that the oil pan had seen better days. That led me to do the pulleys. The manifold heat shields were looking a little tired, so I hit them with some high temp pint.
    Finally, as I had swapped my original pentosin oil cooler, which was warped, with a used (later) replacement, I gave that a shot of gloss black too.




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  21. #96
    Join Date
    Dec 2018
    Location
    Prague , Czech Republic
    Posts
    7
    My Cars
    BMW E31 850i 6gang
    Wery nice! I already wrote to Gladenshop, it seems that they have some more pairs of Shrickcams on stock right now. What type of chip you will use? Thank you for info and good luck with final work on engine!
    Last edited by thomascpthook; 08-03-2020 at 02:25 PM.

  22. #97
    Join Date
    May 2019
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    Grovetown, GA
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    1991 850i 6-speed
    Quote Originally Posted by thomascpthook View Post
    Wery nice! I already wrote to Gladenshop, it seems that they have some more pairs of Shrickcams on stock right now. What type of chip you will use? Thank you for info and good luck with final work on engine!
    I have a set of Wokke V2 chips that I had planned to fit to my M70 before I had the change of plan and hybrid build. The engine will run on these, but not to its full potential.

    I will probably contact Wokke to see if he has chips with the tune that he developed for his M70B54S project available for sale.


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  23. #98
    Join Date
    Aug 2010
    Location
    Illinois
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    259
    My Cars
    2014 BMW 435 xDrive
    Quote Originally Posted by petejk View Post
    I have a set of Wokke V2 chips that I had planned to fit to my M70 before I had the change of plan and hybrid build. The engine will run on these, but not to its full potential.

    I will probably contact Wokke to see if he has chips with the tune that he developed for his M70B54S project available for sale.


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    Before I did my M70/M73 hybrid build, thats the only time I got a hold of Wokke. He did say he was super busy, and that was back in November of last year. I asked him couple months ago about if these Wokke chips he currently has would work, but never got a response.

    That would be great if someone did this. I got mine done, and the car runs so much better. Granted my E31 never ran good. Anyway, will post everything about it at some point. I went the M73 heads route. Didnt replace the head gaskets as the engine only had 78k miles and it was tested. Sounds dumb but Iv taken the top end multiple times and for me thats probably just a 2 day job from start to finish if those take a crap lol. I had a completely custom exhaust made because I went with the M73 heads and didnt want to bother with the M70 exhaust manifolds. So I used the M73 manifolds. Custom downpipes. Came out about a ~$1,500 dollars or so less than a full complete supersprint exhaust.... *rip wallet*

    I tried documenting my build but since Im not used to doing that I missed a lot of the documenting. I have time lapses of me doing stuff, few pictures. I was going to make a whole youtube series on that but I dropped the ball on that. If anyone has questions, feel free to ask, Ill try to help and remember what I did. I spend more time on the BMW E31 World Association facebook page than here. At this point you probably figured out who I am lol.

  24. #99
    Join Date
    Dec 2007
    Location
    orange, ca
    Posts
    2,507
    My Cars
    '91 e31
    From February:
    "Yes, I have a special mapping for the M70B54S. The engine runs with the V2 set but to take full advantage of the engine’s capabilities the special mapping is needed. Attached a dyno graph for your info.
    I do have to purchase each chip separately from the tuner because due to expected volume it made no sense to me to buy a copy license as with the V2 chip set. The guy is charging €799,- excl. VAT (which won’t apply to you) so you my want to check what a local remapping may cost you."

  25. #100
    Join Date
    May 2019
    Location
    Grovetown, GA
    Posts
    777
    My Cars
    1991 850i 6-speed
    Quote Originally Posted by rockytt View Post
    From February:
    "Yes, I have a special mapping for the M70B54S. The engine runs with the V2 set but to take full advantage of the engine’s capabilities the special mapping is needed. Attached a dyno graph for your info.
    I do have to purchase each chip separately from the tuner because due to expected volume it made no sense to me to buy a copy license as with the V2 chip set. The guy is charging €799,- excl. VAT (which won’t apply to you) so you my want to check what a local remapping may cost you."
    Thanks rockytt - that’s good news - using an optimized map is something I to aim to do.


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