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Thread: 911 engine case Revisions

  1. 10-10-2010, 06:33 AM #11
    davep
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    901.101.101.5R 901.101.102.7R
    The right case half changed. I've no idea if 901.101.102.5R or 901.101.102.6R ever existed.
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  2. 10-10-2010, 06:35 AM #12
    davep
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    901.101.101.7R 901.101.102.7R
    The final incarnation of the magnesium case. It was introduced in mid 1973 production and used to the end of the 2.7 production.
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  3. 10-10-2010, 06:36 AM #13
    davep
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    901.101.101.7R 901.101.102.7R AL
    A small run of diecast aluminum cases was made for racing engines as the magnesium case was proving fragile. Photos taken by Steve Weiner of Rennsport Systems.
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    Last edited by davep; 11-01-2010 at 06:20 AM.
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  4. 10-10-2010, 06:38 AM #14
    davep
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    911.101.103.0R 911.101.104.0R AL
    A revised design in aluminum for racing purposes appeared in 1973.
    http://www.early911sregistry.org/for...ead.php?t=8724
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    Last edited by davep; 11-01-2010 at 06:22 AM.
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  5. 10-10-2010, 06:40 AM #15
    davep
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    930.101.103.4R 930.101.104.4R
    The first of the aluminum "Turbo" cases.
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  6. 10-11-2010, 04:12 PM #16
    Steve@Rennsport
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    Quote Originally Posted by davep View Post
    I've no idea if 901.101.102.5R or 901.101.102.6R ever existed.
    I have a 4R/5R '72 case engine in my own car,....

    AFAIK, they never did a 6R (unless it was a prototype and never produced).

    Your last pic is of the 3.0 RSR case. These were die-cast ones and had the finning along the bottom.
    Steve Weiner
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  7. 10-15-2010, 05:46 AM #17
    davep
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    The most useful data so far. I will continue to update as data comes in.
    Anyone that can add to, or update the data, please post.

    YEAR Type Serial # Left Case Right Case Build # Date
    1965 901/01 902086 901.101.101.01 901.101.102.01 1986 1965
    1966 901/01 902586 901.101.101.01 901.101.102.01 2486 1965/06
    1966 901/01 903519 901.101.101.01 901.101.102.01 3419 1965/08 & 09
    1966 901/01 903581 901.101.101.01 901.101.102.01 3481
    1966 901/01 903868 901.101.101.01 901.101.102.01 3787 1965/08
    1966 901/20 906157 901.101.101.10 901.101.102.10 ~4800 sandcast MG
    1966 901/05 909018 901.101.101.01 901.101.102.01 5071
    1967 901/02 960003 901.101.101.02 901.101.102.01 5224
    1967 901/02 961808 901.101.101.0R 901.101.102.0R 8507
    1967 901/02 962170 901.101.101.0R 901.101.102.01 9195
    1968 901/02 4080029 -------------- 901.101.102.01 9272
    1968 901/02 4080261 901.101.101.0R 901.101.102.0R 10111
    1968 901/14 3280442 901.101.101.0R 901.101.102.0R 11233
    1968 901/10 4490002 901.101.101.1R 901.101.102.1R 11474 MG proto
    1968 901/17 no serial -------------- 901.101.102.0R 11771 AL
    1968 901/14 3280910 901.101.101.1R 901.101.102.1R 13352 MG
    1968 901/14 3281356 901.101.101.1R 901.101.102.1R 15372
    1968 901/02 4081419 901.101.101.1R 901.101.102.1R 15415
    1969 901/10 6390297 901.101.101.2R -------------- 17421
    1969 901/11 6298522 901.101.101.2R 901.101.102.1R 24334
    1969 901/09 6292143 901.101.101.2R 901.101.102.1R 25815
    1969 901/16 6196718 901.101.101.2R 901.101.102.1R
    1969 901/09 6290126 901.101.101.2R 901.101.102.1R
    1969 901/11 6298546 901.101.101.2R 901.101.102.1R
    1970 911/03 6102207 901.101.101.3R 901.101.102.2R
    1970 911/02 6300564 901.101.101.2R 901.101.102.1R
    1970 901/38 6404153 901.101.101.3R 901.101.102.2R
    1971 911/03 6110455 901.101.101.3R 901.101.102.3R
    1971 911/03 6110458 901.101.101.3R 901.101.102.3R
    1971 911/03 6111222 901.101.101.3R 901.101.102.3R
    1971 911/07 6115913 901.101.101.3R 901.101.102.3R
    1971 911/07 6116842 901.101.101.3R 901.101.102.3R
    1972 911/51 6120527 901.101.101.4R 901.101.102.3R
    1972 911/51 6120770 901.101.101.4R 901.101.102.3R
    1972 911/61 6129111 901.101.101.4R 901.101.102.3R
    1972 911/52 6220655 901.101.101.4R 901.101.102.3R
    1972 911/57 6520935 901.101.101.4R 901.101.102.3R
    1973 911/51 6130126 901.101.101.5R 901.101.102.4R
    1973 911/51 6131319 901.101.101.5R 901.101.102.7R
    1973 911/51 6131434 901.101.101.5R 901.101.102.7R
    1973 911/91 6133470 901.101.101.7R 901.101.102.7R
    1973 911/91 6133858 901.101.101.7R 901.101.102.7R
    1973 911/52 6230113 901.101.101.5R 901.101.102.4R
    1973 911/52 6230113 901.101.101.5R 901.101.102.4R
    1973 911/62 6239200 901.101.101.7R 901.101.102.7R
    1973 911/53 6330398 901.101.101.5R 901.101.102.4R
    1974 911/92 6141648 901.101.101.7R 901.101.102.7R
    1974 911/77 6840161 911.101.103.0R 911.101.104.0R AL
    Last edited by davep; 12-07-2012 at 07:42 AM. Reason: adding updates
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  8. 10-15-2010, 05:49 AM #18
    davep
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    One of the most interesting cases is the sandcast magnesium case used in the 906.
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    Last edited by davep; 11-01-2010 at 06:24 AM.
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  9. 10-17-2010, 07:27 AM #19
    beginner
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    Quote Originally Posted by davep View Post

    911.101.103.0R 911.101.104.0R AL
    A revised design in aluminum for racing purposes appeared in 1973.
    AFAIK, that crankcase had a stud spacing of 83mm (3mm more than std), unique to the 3.0-liter RS and RSR.
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  10. 10-17-2010, 07:45 AM #20
    davep
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    Thanks. Details like this will be added as research progresses. I'll also add annotated photos depicting the various changes. Any and all help gladly accepted.
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