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Thread: 1971 911S Fuel Tank. Lines Sizes?... Photos would be Great. ;o)

  1. 07-01-2019, 05:30 PM #1
    Nickm
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    1971 911S Fuel Tank. Lines Sizes?... Photos would be Great. ;o)

    I have a bit of a dilemma. I have a '71 911S that I'm attempting to connect the brand new gas lines. to the gas tank fittings.
    This car is being restored. SO... I have a brand new banjo fitting... 14mm style. Correct for a '71 911S. 1971 is the first year
    that gets the 14mm banjo fitting. The gas hose the goes onto it is a 8mm id hose. That is the "large" hose..... THEN... there
    is a smaller hose for return. Correct? But... the fitting that goes into my tank will only fit a 8mm ID hose. ANOTHER large hose.
    Seems like the return line fitting should be for the smaller hose.

    Hopefully this all makes sense.
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  2. 07-01-2019, 08:22 PM #2
    Richy
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    You have things reversed in the picture . The fitting marked gas return is the supply . For an MFI car the fitting is 10 mm , and the supply hose is 9 mm ID . The fittings are available in 8 mm and 10 mm sizes . The banjo fitting is for the return line and is 8 mm , and the return line is 7 mm or 7.5 mm . Simple really .
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  3. 07-02-2019, 04:36 AM #3
    Simonjjb
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    I've been somewhat confused on this issue also.
    Last edited by Simonjjb; 10-14-2019 at 12:25 PM.
    1968 911L Coupe - Golden Green
    1971 911S Coupe - Gemini Blue
    1973 911S Targa - Signal Yellow
    1974 914 2.3 - Sunflower Yellow
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  4. 07-02-2019, 05:42 AM #4
    edmayo
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    The small sock is for the webasto
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  5. 07-02-2019, 05:52 AM #5
    Simonjjb
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    Quote Originally Posted by edmayo View Post
    The small sock is for the webasto
    Interesting. My car has no Webasto. And a regular fuel line was connected. Ed, are you also saying that what is described by Richy is correct?

    1 Sock
    1 Banjo in center hole
    1 plug
    1968 911L Coupe - Golden Green
    1971 911S Coupe - Gemini Blue
    1973 911S Targa - Signal Yellow
    1974 914 2.3 - Sunflower Yellow
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  6. 07-02-2019, 06:04 AM #6
    edmayo
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    Yes, engine feed banjo is larger one on left side of tank, return is center, no webasto, no line to that fitting.
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  7. 07-02-2019, 01:03 PM #7
    Nickm
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    Awesome! Thanks so much! ;o)
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  8. 07-02-2019, 02:02 PM #8
    edmayo
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    I hope you aren't really using that hose clamp in your picture.
    Last edited by edmayo; 07-02-2019 at 03:00 PM.
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