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Thread: Sheet/steel thicknesses in the 911 sport purpose

  1. #1

    Sheet/steel thicknesses in the 911 sport purpose

    I would like to ask if there is any thread related to sheet thicknesses between 1970/72 with which any 911 is manufactured. I know some information about the last st but I would like to know if there is any specific thread on this subject. I understand that the porsche used a type of steel of different thickness (same composition) to build cars "somewhat lighter" than the "normal" ones? Then, the preparations with wood fibers, aluminum etc ...? It's right?

  2. #2
    What measures exist to verify a 'sport purpose' lightweight body from the group produced in '69? Which panels were lightweight in these bodies? Were the same lightweight panels used in all of them, or did some bodies have different pieces than others? Regarding the thickness, what thickness did the lightweight parts have? 0.6mm, 0.7mm? On another note, in the lightweight 'sport purpose' vehicles... How can one measure the thickness of the roof sheet metal? In my case, by taking measurements after removing the sunroof frame, I reach a sheet that I can easily measure, but I am unaware if at this point of the sunroof (where there is a thin black rubber, inside), two sheets are joined or only one. I am interested in ruling out that my vehicle has any lightweight panels and also interested in knowing which panels they might be. I know they have been mentioned here before, but in the case of the roof, I have never known how the measurement process would be.
    The rear crossbeam, for instance, was it ever produced in a 'lightweight' version?

    https://www.early911sregistry.org/forums/showthread.php?150746-Ultimate-69S-factory-Sports-purpose-thread&highlight=thickness
    I'm going to check this post!
    +
    https://www.early911sregistry.org/forums/showthread.php?131632-1972-73-RS-Carrera-Cars-Use-of-thinner-steel-Light-weight
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    Last edited by _gonbau; 12-16-2023 at 10:12 AM.

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    Quote Originally Posted by HughH View Post
    Hi Matthew

    From my understanding, given that your car has "had a real beating" and also the exterior panels have all been replaced, I would be looking at the sheet metal forming the rear panel between the passenger area and the engine, the inner rear wheel arch panels and if it is still original the rear floor panels all of which should be thinner than normal if a lightweight car - the approx thickness of metal (likely to vary across the panels) is about 0.6 to 0.7mm the metalwork for the front dash is also likely to be thinner

    normally most of the exterior panels would also be thinner but as yours have been replaced it would be impossible to check

    The best way to check however is if you can get a copy of the entry for your car in the build book - IF it is a lightweight it will be noted there either as "930kg" or "930kg rallye"

    However I suspect that your car might be a bit too early to have one of the lightweight bodies that were initially produced in 1969 but mainly, as I understand it, for use in the 1970 (and 1971) MY cars
    https://www.early911sregistry.org/fo...ss#post1071207

    +

    Barcelona indicates that this panel has no importance in the measurements, that it could be purchased for €90 (I suppose, implying that it is a purchased panel) in the same message "Barcelona" also indicates that the panel could have been lightened by hand. I leave it here as a note. Like a joke to hear in the not so distant future. At that level I have had to play to clarify concepts with these people. Anyway.
    Last edited by _gonbau; 12-23-2023 at 03:38 AM.

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