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Old 03-09-2005, 12:23 PM
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universal fuel sending unit for pre-65 chev?

I see that J C whitney sells three universal sending units that would be perfect for my relocated gas tank on my 57 chev truck if I can get the right ohms for the original guage. One is for ford/chrysler, one is for newer gms, and the third one is for Stewart-Warner gauges and doesn't say what ohms it is. I need 0-30 ohms for my application (pre-65 chev). Anyone know what ohms for the Stewart-warner guages? Or does anyone know where I can get a universal top mount sending unit that's 0-30 ohms. I'm using a 65 Mustang tank. It has a flat spot on top where I can mount a universal sending unit and it's a fairly shallow tank, only 7" deep.

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Old 03-11-2005, 11:18 AM
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I got ahold of JC Whitney. Apparently Stewart Warner gas guages are in Jeeps and are 240-33 ohms.
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Old 03-11-2005, 12:33 PM
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gas guage ohms

the ohms for pre 65 sending unit is ( 0 to 90 ohms ) for stock dash unit guages. hopes this helps..
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Old 03-14-2005, 10:50 AM
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Sedan Delivery, Autometer's site says most pre-1965 gas gauges are 0-30 ohms. Post 1965 are 0-90 ohms.
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Old 03-14-2005, 10:53 AM
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I do have another option. I have a Ford sending unit that fits the Mustang tank. I might try modifying it by using the guts of the original 57 sending unit. It is spot welded to the side of the siphon tube. I need to take a better look to see if it's possible.
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Old 04-24-2005, 02:51 PM
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gages

my 55 Chevy had a 0-90 ohm sending unit. i also worked for Buick motor division for 1960 to 1970 and Oldsmobile from 70 to 1985 and they had 0-90 ohm sending units . i still have the tester in my tool box. a little information for sending unit testers. check it with your ohm meter, to be sure..
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Old 04-24-2005, 05:10 PM
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Stewart Warner

Doc here,

According to the Stewart Warner Web Site, The Smallest Sender I could find was 0 to 90... Looked high and low for a 0 to 30 , they must not make them any more..

Try getting a "Footprint" of the sender bolt pattern on the tank and go to the local auto parts store and try a match for 0 to 30 into a Mustang tank (Like maybe a 64 Falcon?)

Another option, Get an ohm meter, and measure the sender while BENDING the float up to where it hits the top of the tank at 30 ohms...for full, (you may have to extend the rod) not high tech..but it works...

I'll look again on VDO and others and let you know what I can find.

The Stewart Warner Chart For fuel senders:
=================================

Table of Sender Resistance (Ohms) Vehicles Empty Full :

Stewart Warner Performance~ 240 33.5
GM before '65~ 0 30
GM '65 to present` 0 90
Ford prior to '89 and Chrysler ~73 10
Ford '89 to present~ 16 158

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