Aftermarket fuel gauge

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I installed Speedhut gauges, and the Gas Gauge uses the stock (aftermarket) sender.

I manually calibrated the gauge to the sender so that "F" is full, and "E" means 10 litres left in the tank.

This gauge is dead bang on accurate at virtually any spot between F and E. Easily the most accurate Gas gauge I've ever had in any vehicle.
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Chrysler uses a 70-30 ohm gauge/sending unit. When looking for a gauge check the ohms for the gauge to match the Chrysler sending unit. You will find loads of the GM style that I think are 0-60 ohms. Good luck with you search.
 
Chrysler uses a 70-30 ohm gauge/sending unit. When looking for a gauge check the ohms for the gauge to match the Chrysler sending unit. You will find loads of the GM style that I think are 0-60 ohms. Good luck with you search.
Wrong, all of Chryslers gauges and senders operate on 80-10 ohms range. The problem we run into is the aftermarkets replacement fuel senders. Although correct at 80-10 range, they are linear so they don't work right with the OEM gauge. So if you do use one of those senders, you'll need the addon Meter Match unit to calibrate the OEM gauge to it or aftermarket gauge that can be calibrated to it. Good luck
 
I also use the Equus 7361 fuel gage in my 66 B-Cuda, and it works perfect with the stock mopar sender. I made a whole set of dash gages around the 7000 series gages. They fit perfect in my dash.
The whole dash is LEDs, as is the rest of the B-Cuda
Dave

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I looked up what the 1969 factory service manual had to say for Ohm readings.
Empty Stop= 73 ohms + or - 12.0 ohms
Full Stop= 9.6 ohms + or - 1 ohm. If the ohm meter has a error of more than 1 in 10 ohms a accurate value cannot be obtained.
A 64 manual and a 66 manual more or less said the same thing,just worded different.
 
Wrong, all of Chryslers gauges and senders operate on 80-10 ohms range. The problem we run into is the aftermarkets replacement fuel senders. Although correct at 80-10 range, they are linear so they don't work right with the OEM gauge. So if you do use one of those senders, you'll need the addon Meter Match unit to calibrate the OEM gauge to it or aftermarket gauge that can be calibrated to it. Good luck
Wrong.
 
Would

would
i need to calibrate it
You should not. They are calibrated for 73 ohms to 10 ohms full to empty. The only thing is, if you have a replacement sending unit, it will not be linear. The first 1/2 tank or more will drop quickly on the gauge because of the indent in the tank for the spare tire well. Apparently you can get devices to fox this, but I don't worry about it. I know that's how it reads, so I take that into account.

Cley
 
You should not. They are calibrated for 73 ohms to 10 ohms full to empty. The only thing is, if you have a replacement sending unit, it will not be linear. The first 1/2 tank or more will drop quickly on the gauge because of the indent in the tank for the spare tire well. Apparently you can get devices to fox this, but I don't worry about it. I know that's how it reads, so I take that into account.

Cley
Thanks everyone just orderd it from summit
 
Wrong, all of Chryslers gauges and senders operate on 80-10 ohms range. The problem we run into is the aftermarkets replacement fuel senders. Although correct at 80-10 range, they are linear so they don't work right with the OEM gauge. So if you do use one of those senders, you'll need the addon Meter Match unit to calibrate the OEM gauge to it or aftermarket gauge that can be calibrated to it. Good luck
Help a brother out here. I see "linear" thrown around a lot referring to gauges sometimes. I "assume" that to mean that as the (lets say float arm on a fuel sender) moves from one extreme to another, that the resistance reading does not coincide with how the arm moves. So I guess if the Chrysler units are "non linear" I guess that means the sender would move the needle "more" or less" in different places of travel. Am I think right on that?
 
Help a brother out here. I see "linear" thrown around a lot referring to gauges sometimes. I "assume" that to mean that as the (lets say float arm on a fuel sender) moves from one extreme to another, that the resistance reading does not coincide with how the arm moves. So I guess if the Chrysler units are "non linear" I guess that means the sender would move the needle "more" or less" in different places of travel. Am I think right on that?
Yes. Linear would mean that between the limits of mechanical movement, which correspond with the resistive values for F and E, that a mechanically evenly divided movement would mean an evenly divided increase of resistance, and if the GAUGE response is also linear, then it would be so, as well

Maybe an easier example is older analog electrical meters of most types, like an analog VOM. If you are on a scale of 0-100V, then 50 V is 1/2 scale, and 25 V is 1/4 of the scale, etc.

There WERE electrical meters that were intentionally made non linear, LOL. Such as the old CD (Civil Defense) yellow radiation survey meters. These are essentially a high scale Geiger counter, designed to measure higher levels after "an attack." When "we" were kids starting out in ham radio a couple of us obtained some of these, and tried to use the meters for other purposes, and could NOT figure out why we could get no accuracy LOL

The retired Bird Colonel in the local radio club knew and explained to us.

On an unrelated note, he got to test fly some german aircraft that had been captured in WWII.. Now that he's gone, all that is lost. He never wrote a book.
 
I installed aftermarket gauges in my duster a few years back.
I'm using NVU gauges, they have programmable units utilizing dip-switches. (The fuel gauge is set for 1965-86 Ford/AMC/Chrysler. 73-10)
The TSM I read stated that it was 73 ohms for Empty-STOP and roughly 9.6 ohms for Full-STOP.
80-10 COULD technically work I guess... You'll just have to gas up before it points directly to "E = Everything is okay".
 
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As long as you be sure to buy the one for Chrysler sending units, just hook it up like the instructions say and you are good.

Cley
Hi Clelan ,were did you hook up the sending unit wire ,Can i hook mine at the kick panel wire on the driver side .Thanks
 
I hooked mine up to the original sending unit wire. I cut it iff the plug at the back of the dash, but you could intercept it at the kick panel too.

Cley
 
The fuel sending unit wire in the driver side kick panel is light blue. That is where I connected my after market fuel gage.

Dave
 
I used this exact gauge with excellent results. The price is right too!

Cley
Okay i have a problem i hooked the guage to power when i turn the ignition on the guage goes right to full when i hooked the sending unit wire up at the sill plate dark blue wire it stays the same .any help please
 
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