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Thread: Part / casting Number, 2.2S Nitrated rods ?

  1. #11
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    Hence my question Andy .

    Mike Bainbridge has informed me that all T,E,S, 2.2 rods are the same.?

    Further research on the board advise not using the old rods in an engine build. Pauter or carillo for my 2.3 ST build ?

    Dave

  2. #12
    Senior Member CamBiscuit's Avatar
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    Dave I've got Pauter in my 2.3 if that helps but I suspect they will both do the job well......
    Looking for engine # 6208151
    '74 RS 3.0 Replica
    '70 911E Bahia Red (SOLD)
    '71 911 S/T Replica 2.3 Twin plug BEAST (SOLD)
    Australian TYP 901 Register #78
    Early S Registry # 1076

  3. #13
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    I think what you use depends on your ultimate budget and goals; I know of several highly regarded engine builders who use prepped and matched 2.2 stock rods with aftermarket bolts in their race engines, and claim never to have had a rod failure. The 2.2 rod addressed several issues and weak spots in the original design, and are considerably reinforced in the shoulder and bolt seat areas. They're pretty stout.

  4. #14
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    I've got used matched-weight 2.2 rods in my 2.5 litre twin-plug engine.

    They were magnafluxed/balanced/shot-peened & modified to accept new ARP rod bolts.
    Andy

    Early 911S Reg #753
    R Gruppe #105

  5. #15
    Hi Chris, as usual thanks for a complete explanation, going in my save file!
    Early S Registry member #90
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    Fort Worth Tx.

  6. #16
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    ...and what about these rods?
    I can't find a picture like that in porsche books or manuals.
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  7. #17
    Those look like unfinished forgings, without the weight balancing pads ground down.
    Early S Registry member #90
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    Fort Worth Tx.

  8. #18
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    That's one ugly rod. Not so sure about unfinished forgings; a typical 911 rod has only a small portion on the big end ground. That appears to be a completely different forging.

    Whatever they are I would never install them in a motor. Unless I was building a 911 industrial engine.

  9. #19
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    Quote Originally Posted by edmayo View Post
    Those look like unfinished forgings, without the weight balancing pads ground down.
    Checked the weight: 744 gr, correct for 25 group, so they aren't unfinished forgings.

  10. #20
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    May be this ?
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