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Discussion Topic:
Gas tank sending unit?
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supereal |
04-03-2010 @ 7:18 AM
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Senior
Posts: 6819
Joined: Oct 2009
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The reason the gauge moves up as engine speed increases is a corresponding rise in the system voltage. Place a voltmeter across the battery posts and observe the voltage as you increase engine speed. It is likely that you will see it rise well above the approx. 7.5 volts that is "normal". If you have the three brush generator, adjust the movable brush to get the right level. If you don't drive at night, adjust with the headlights off. High system voltage will reduce the life of all electrical parts, battery, points, lamps, etc. We have used many of the repro senders, but they do tend to be voltage sensitive. Unless you can find an original sender on eBay, etc, the repro will have to do.
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Flatbob |
04-02-2010 @ 5:26 PM
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Member
Posts: 437
Joined: Oct 2009
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I got the sending unit from C&G a cpl. of years ago. Here's the problem, the gauge is accurate with ignition on or engine at idle but as I increase RPM'S gauge moves towards full, the more RPM's the fuller the tank gets! Was told I need an original sending unit because of mismatch between gauge & sending unit, gonna see if I can get a original '367-'48 sending unit.
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one50ford |
04-02-2010 @ 4:50 PM
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Member
Posts: 10
Joined: Dec 2009
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I just installed the C&G (it is actually the Bob Drake seending unit), today. It works perfectly. You do have to measure the depth of your gas tank, then cut and bend float arm as instructed to get proper reading on gauge. It comes with a ground wire, too. Total install took less than 30 minutes.
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supereal |
04-02-2010 @ 10:35 AM
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Senior
Posts: 6819
Joined: Oct 2009
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There is a difference between the original King-Seeley senders and the repros. Be sure you have the 6 volt version, if that is what your car needs, and thr repros work well if the float arm is bent to conform with the actual fuel level in the tank and the float doesn't contact any baffles. We always run a separate ground wire from the body of the sender to a known good ground.
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trjford8 |
04-02-2010 @ 10:04 AM
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Senior
Posts: 4227
Joined: Oct 2009
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36-48 should be the same. If you use the 49-53 it will work with your gauge,but you may have to modify the float arm. Try running an extra ground wire off a sending unit screw to see if that helps. Sometimes a bad ground can cause the unit to malfunction.
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Flatbob |
04-02-2010 @ 8:01 AM
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Member
Posts: 437
Joined: Oct 2009
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I have reproduction sending unit in my '36 and doesn't seem to be compatible with my original gauge. Would any original 6V sending unit from '36-'55 work in my '36? Am thinking with that range of years it might be easier to find an original. I see in the C&G catalog they have the same part # for '36-'55 repo. sending units.
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