250 California Spyders

Discussion in 'Vintage (thru 365 GTC4)' started by Robertb, Sep 15, 2004.

  1. Marcel Massini

    Marcel Massini F1 World Champ

    Mar 2, 2005
    First six owners of 1497 GT were in Italy between 14 November 1959 and 17 June 1967.

    Marcel Massini

    AUSWOODS Rookie

    May 2, 2019
    Full Name:
    Ricahrd A Woods

    I am having a very esoteric debate. What is the factory correct thickness of the body on the Competitzione 2.2mm or 1.6mm - or are we completely wrong ??
  3. Smiles

    Smiles Moderator
    Moderator Owner

    Nov 20, 2003
    Pittsburgh, PA
    Full Name:
    Matt F
    I think you’re looking for precision where it doesn’t exist.

    Even if Pininfarina started with nominal 2.0mm sheet metal, they wouldn’t have been exactly that.

    And after those panels had been beaten into shape, they would be somewhat thinner.

    So a finished car isn’t going to have a uniform body thickness.

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    AUSWOODS Rookie

    May 2, 2019
    Full Name:
    Ricahrd A Woods
    Think your right and good advice. Did find this post after some nifty searching

    Wow. A technical question on a topic I actually know something about.

    The alloys of aluminum have varied, and it's almost impossible to say exactly what sort of sheet was originally used.

    Having said that, it's pretty clear that the thickness of aluminum sheet used on most racing models was around 1mm or 0.040". When repair panels are made, they are generally made with 3003 sheet and 1100 welding rod.

    The H numbers quoted above indicate the heat treat, and are pretty irrelevent for this use, as the metal will almost always be annealed to dead soft (often many times over) in order to be shaped. The "flexibility" and maleability" you refer to, Horsefly, is this softness achieved by annealing. 3003 can be annealed over and over again, and work hardens as it is shaped.
    Smiles likes this.
  5. Ed Niles

    Ed Niles Formula 3

    Sep 7, 2004
    West Hills, CA
    Full Name:
    Edwin K. Niles
    Is that with or without the bondo?
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  6. mechaniker

    mechaniker Formula Junior
    Rossa Subscribed Owner

    May 30, 2004

    Have a look from second 5 on.
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