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Thread: Weber 46 IDA question

  1. #1
    Senior Member
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    Weber 46 IDA question

    Hi all,

    Found a set of Weber 46 IDA carbs with manifolds.

    Does anyone know what engines these were applied to? Was it part of a sport purpose kit?

    Since the carbs have only numbers and no letters, these appear to be used by Porsche on a Porsche car (not aftermarket)?

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  2. #2
    Webers supplied by Porsche and used from 1968 for Sports Purpose (Sport Kit) 911s, 914/6 GT and 2.3 liter 911ST. Color of Weber bodies and serial numbers are the determining factors in my response. The Webers look to have original safety wire on the grub screws that retain the main venturis indicating they may be rather unmolested.

    Congratulations in your acquisition!
    Paul Abbott
    Early S Member #18
    Weber service specialist
    www.PerformanceOriented.com
    info@PerformanceOriented.com
    530.520.5816

  3. #3
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    Quote Originally Posted by 1QuickS View Post
    Webers supplied by Porsche and used from 1968 for Sports Purpose (Sport Kit) 911s, 914/6 GT and 2.3 liter 911ST. Color of Weber bodies and serial numbers are the determining factors in my response. The Webers look to have original safety wire on the grub screws that retain the main venturis indicating they may be rather unmolested.

    Congratulations in your acquisition!
    Thanks Paul! The manifolds and carbs look authentic to me too.

    Manifold casting is: 901.108.319.00

  4. #4
    Yes, all items are original.
    Paul Abbott
    Early S Member #18
    Weber service specialist
    www.PerformanceOriented.com
    info@PerformanceOriented.com
    530.520.5816

  5. #5
    Senior Member VintageExcellen's Avatar
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    Tall 911R manifolds - very rare and they are only 38mm so they can be used on something smaller than a massive race engine. All the 911R manifolds I have ever seen had 40-41mm ports to the head so too big for a smaller motor. Nice score.

  6. #6
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    Quote Originally Posted by VintageExcellen View Post
    Tall 911R manifolds - very rare and they are only 38mm so they can be used on something smaller than a massive race engine. All the 911R manifolds I have ever seen had 40-41mm ports to the head so too big for a smaller motor. Nice score.
    Thanks Mark!

    Just to clarify, I didn’t buy them myself, a good friend of mine did. Just trying to help establish if they are original :-)

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