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Thread: early 300xxx heat exchangers

  1. #11
    Senior Member HughH's Avatar
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    And Jon I presume the real reason to have the restrictors on the “normal “ until the new engine was introduced was to lower the power output of the normal otherwise it would have been too close to the S as there are plenty of examples of early engines even with almost no modifications making close to 67S power figures- or at least close enough to worry the sales department about how many of the new S they could sell or what price point they could achieve
    Hugh Hodges
    73 911E
    Melbourne Australia

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    Australian TYP901 Register Inc.

    Early S Registry #776

  2. #12
    Senior Member haul's Avatar
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    Quote Originally Posted by HughH View Post
    And Jon I presume the real reason to have the restrictors on the “normal “ until the new engine was introduced was to lower the power output of the normal otherwise it would have been too close to the S as there are plenty of examples of early engines even with almost no modifications making close to 67S power figures- or at least close enough to worry the sales department about how many of the new S they could sell or what price point they could achieve
    absolutely...to quote the service bulletin M16/66...

    ".....The above listed heat exchangers may be used as replacement parts in Type 2000 engines up to Engine Nr. 909 927, as indicated in Service Bulletin M 14/66, although this will result in increased engine power output."
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  3. #13
    So, which version was used from 68 on? Or are the 67S heat exchangers unique?

  4. #14
    Hugh, I think that's the common view and probable reason, although I'm not sure if Porsche ever publicly stated that.
    The 901/06 engine was developed for a better driving experience in the lower engine speeds.

    Quote Originally Posted by sanders View Post
    So, which version was used from 68 on? Or are the 67S heat exchangers unique?
    I believe the '68 models continued to use the '67S version unaltered.
    The basic design continued until, I believe, the '75 model year, but there were occasional changes to the heat shrouds and possibly the header tubing too.

    Jon B.
    Vista, CA

  5. #15
    Senior Member JT912's Avatar
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    Just came across some images of these early heat exchangers in my 1965 edition workshop manual.
    Attached Images Attached Images   
    John Thompson

    1966 912. My first car. Bought it Nov. 25, 1988. Still have it.

  6. #16
    Junior Member
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    Are these heatexchangers still available ?

  7. #17
    Senior Member
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    Yes I got a set on stock

    Pls send me a email to early911parts@gmail.com

    Marek



    Quote Originally Posted by Vekara View Post
    Are these heatexchangers still available ?

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