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Thread: 911S 66 vs 67 is there a difference?

  1. 02-18-2008, 01:28 AM #1
    preS
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    911S 66 vs 67 is there a difference?

    Since my engine rebuild for my 66 is going to take a little while, I bought a MY68S alu engine (408XXXX engine code 901/02) for temp. use / spare.

    I have looked in my little specs dated Dec. 67 but can not find a straight answer.

    Are the S engines 66-68 w/ engine code 901/02 all the same for cam and pistons? Are there small mods or was it just the numbering that went from 96XXXX to 408XXXX?

    Regards,

    Richard
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  2. 02-18-2008, 07:24 AM #2
    JHunter
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    My quick look showed that both the 67' and 68' 901/02 engines have the same compression ratio of 9.8:1, same ports 36 & 35mm, and same size valves 42 & 38mm. The hp and torque specs are the same. I only see the 901/02 engine being used in 67' & 68'. Hopefully someone with more experience will chime-in.
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    Jon

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  3. 02-28-2008, 04:17 AM #3
    66S
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    67-68

    They are the same internally. Some 67s might have forged rocker arms.
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