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Thread: Can heads machined to fit 2.4 cylinders be used on 2.0 cylinders again?

  1. 08-29-2014, 08:22 AM #1
    Olivier
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    Can heads machined to fit 2.4 cylinders be used on 2.0 cylinders again?

    Hi!

    Title says it all.

    is there a solution to use heads machined to fit 2.4 cylinder, on std 2.0 cylinders?

    is it necessary to reweld the heads? I think i read somwhere that there are some adapters made but can't find it again.

    Thanks for any help!

    Olivier (and sorry if it has been beaten to death previously)
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  2. 08-29-2014, 12:06 PM #2
    lkadams
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    There was mention in another thread that Supertec makes a spacer for 2.2/2.4 heads on 2.0 cylinder.
    http://www.supertecperformance.com/
    Keith Adams
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    Early 911S Registry #906 | PCA member IG: @912R
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  3. 08-29-2014, 02:11 PM #3
    Frankr
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    Quote Originally Posted by Olivier View Post
    Hi!

    Title says it all.

    is there a solution to use heads machined to fit 2.4 cylinder, on std 2.0 cylinders?

    is it necessary to reweld the heads? I think i read somwhere that there are some adapters made but can't find it again.

    Thanks for any help!

    Olivier (and sorry if it has been beaten to death previously)
    Good Q. Had the same question bout 2.2 heads that were adapted to 2.7 MFI RS conversion use.
    1969 911S Targa
    1970 911S Coupe
    1973 911T w 3.2
    1972 Alfa GTV 2000
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  4. 09-03-2014, 06:17 AM #4
    2.5MFI
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    Olivier, I believe Henry at Supertec has thick walled 80mm cylinders that fit early heads that have been machined out for 84mm and larger cylinders.
    Mark Jung
    MFI Werks
    Early 911S Registry #972
    Carrera T w/LWB, MT, RWS, PCCB
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  5. 09-03-2014, 06:20 AM #5
    Olivier
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    Thanks guys for the answers.

    Actually Henry adised me to have the heads welded/machined.

    Regards

    Olivier.
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  6. 09-03-2014, 06:29 AM #6
    Jim Breazeale
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    Why not just buy a set of 2.0 heads? That would be far cheaper than welding and machining a set. They are cheap and plentiful. In fact, I know a guy 100s of them.

    Regards

    Jim
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  7. 09-04-2014, 12:45 AM #7
    Olivier
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    Jim,

    what a lucky guy!!! Hundreds really?? I wonder where one can find such a treasure! ;-)

    Your point is correct. But, they are pretty rare Carrera 6 twin plug heads... (not mine, unfortunately) Would you have some in your stash?

    Ollivier
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