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Thread: 3 liter case differences

  1. #1
    Senior Member NickP's Avatar
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    3 liter case differences

    What are the main differences between a 76-77 3.0 liter turbo case (930/53) and a standard early 911 SC case, like the 78-80? Also, do both use the same 70.4 crank?

    Thanks

    Nick
    Nick Psyllos
    S Reg & R Gruppe
    1973 Euro 911S
    1972 911T to ST

  2. #2
    Trusting to memory here Nick, I think the 76-77 aluminum cases still used the main bearing size and 6 bolt flywheel from the first generation engines. 78 and up started the 9 bolt flywheels and larger main diameters. I'm sure some one will verify or correct
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.

  3. #3
    Senior Member NickP's Avatar
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    Thanks Ed, I think that’s correct regarding the 6 bolt flywheel being used on the early turbo case.
    Nick Psyllos
    S Reg & R Gruppe
    1973 Euro 911S
    1972 911T to ST

  4. #4
    Yup. Crankshaft...6 bolt 75-77 3.0L cases ... 9-bolt 78 and later.
    -Marco
    SReg. #778 OGrp: #8 RGrp: #---
    TLG Auto: Website
    Searching for engine #907495 and gearbox 902/1 #229687

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