My current project is a Speedster w/ 6 volt electrics. I do not want to use the traditional "T" tank in back of the seats, and have opted to install a 15 gallon poly tank supplied by marine dealers under the seats, with a vacuum fuel pump. The Poly Tank comes with a fuel gauge sending unit pre-installed. I have to presume it was intended for a 12 Volt system and is referred to as a "universal" sending units. The brand on the sending unit is "Medallion" but there is no model number. Anyone know if sending units made in the last 10 years or so care what voltage is being put through them? I will install a 6 Vt Gas Gauge of course.
once again , i do not consider fuel senders 6 or 12 or 24 volt , they are just variable resisters. the range must be matched with fuel gauge itself first thing to do is to get an ohmmeter and measure it full and empty.....that will tell you what gauge you need i'm guessing it will be 240/33 ohms
Thx, I tried to search before I posted. Perhaps I did not phrase it right, but I kept getting hits back on running 6 volt gauges on 12 volt systems.
Fuel gauge senders are not voltage sensitive - no such thing as 6v or 12v senders. They just provide resistance to ground
Agree with this also. A fuel gage is just a resistance gage that is calibrated E to F instead of the number of ohms. The sender is just a variable resistor, it has not voltage. Just match the sender resistance range to your gage range. Most of the universal senders are a 5-bolt pattern and they all use the same bolt pattern. So you could get another brand to match your gage if needed.
So you guys are saying that senders stamped 6V by SW on their box will work well on gauges made for 12 V systems. I bought a 6V sender in the box off of Ebay. It works well with my 6V gauge after the runtz reduced the voltage feeding the gauge. Ive never seen anything in the literature that states the resistance of the sender. I understand that it must match the gauge....Are the 6V gauges the same resistance as the 12V gauges? If there were no difference why would they label them 12V-6V? I bought this sender to use with my 2 5/8 crescent needle gas gauge. since i used it on my big logo gas gauge Can any one say Yes I actually used a modern SW sender on an old 6V gauge and it read correctly? Theory is one thing but I want to hear from those that actually did it. I spent a couple of hundred dollars of 1964 dollars trying to cure an over heating problem only to find out that it was the wrong sender. Same company, 5 years apart and both 12 V I'm leery of electrical senders that may? not match.
what we are saying is if the sender is of the correct ohms range it should work fine. on the `49 ford woodie i did i used the stock fuel gauge with a voltage drop and a 75-10 ohm sender and it worked fine i've done the same thing on several `40 fords with good results too
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