R8 / R10 fuel sender resistance
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  1. #1
    Fellow Frogger!
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    Default R8 / R10 fuel sender resistance

    Hello knowledgeable people,

    does anyone have handy the ohm's shown for the standard sender at full and empty?

    I'm assuming full is basically 0 ohm's.

    Anyone?

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    BR
    BR

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  2. #2
    Fellow Frogger!
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    I was looking for the answer to this question and could only find this thread where Brett does not seem to get a response. I am sure I saw it on AF somewhere before ? Any answers ?

  3. #3
    Fellow Frogger!
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    Surprised nobody knows the answer ?

  4. #4
    Fellow Frogger! neural revolt's Avatar
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    From post 15 at this link:

    R8 fuel gauge sender unit access

    "the low level on the gauge corresponds with high resistance (about 500 ohms) at all of the senders. When "full" at the sender unit, the resistance varies from 1.5 to a bit over 5 ohms, depending upon which sender unit I measured up. Hmm again. These were never particularly accurate of course."
    Past Frogs:
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  5. #5
    Fellow Frogger!
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    Thanks for the reply. I had two senders and when I checked them both there was no resistance. Although they looked fine, one like new, when I removed the top I found that time has taken its toll on the resistors. I was thinking of rewinding the resister using my old slot car racing skills but then decided on just getting a new VDO fuel gauge and sender.

    Since the tank is out on this project, its easy to change the PCD on the sender mount. The last time I did that modification I had to gain access to the tank through the inspection hole in the rear parcel shelf of the R8.

  6. #6
    1000+ Posts geckoeng's Avatar
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    "Busta.."

    See Graeme's Gordini for my modification of tank for VDO units.

    Ray
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    Think Old, But Run Modern !!

  7. #7
    Fellow Frogger!
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    Thanks Ray, I found the page with the pics of the modified clamp ring etc.

  8. #8
    1000+ Posts Frans's Avatar
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    FWIW I have 2 units and both measured 350 ohms +- 2ohm.

    Frans.
    Old enough to know better
    Young enough to do it anyway.

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