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Thread: 3 liter case differences

  1. 03-01-2018, 10:00 AM #1
    NickP
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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
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  2. 03-01-2018, 04:07 PM #2
    edmayo
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    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
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  3. 03-01-2018, 04:25 PM #3
    NickP
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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
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  4. 03-05-2018, 03:50 PM #4
    Mr9146
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    Yup. Crankshaft...6 bolt 75-77 3.0L cases ... 9-bolt 78 and later.
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