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Are modern gauges compatible with stock oflathead V8 sensors for water temp, oil pressure and fuel level senders.
what are issues with mechanical speedometers
For electronic units, the easy answer is "No". Senders and Gauges must be purchased as matched pairs. If you want a longer answer, we can get into the electrical engineering side of things...
I am assuming mechanical Speedometers here - one must take care to have the correct ratios all around for the desired unit. Best bet is to contact the vendor/manufacturers for fitment and application.
If you are looking for custom gauges might take a look here as they have many styles and sizes.
Yes you will need to use their senders.
As for the fuel level you use what you got but it may not work like factory.
They can set empty / half / full but in between them could be off.
I got a set for my 70 AMC Javelin but want them to look and fit in the factory locations.
Fitted into a hand made silver carbon fiber dash that looks like a base model till you look close like the gauges.
The speedo is GPS. I have yet to have enough gas in the tank to see how the level tracks. It is a vary long project
Dave ----
As for the fuel level you use what you got but it may not work like factory.
They can set empty / half / full but in between them could be off.
That only works if the sending unit is a ohm/resistance based model where the ohm readings are within the range of adjustments. The stock sending units on our trucks are not ohm/resistance based which only really work with matched King-Seeley distometer gauges, not ubiquitous ohm meter based gauges.
You would need to talk to them as they may have something that would work.
I have had the gauges for about 15 years now and I know when I ask about the fuel sender they asked a bunch of questions but as soon as I told them it was for a 70 AMC car they knew just when to do and told be how it would work as they just did one.
I also knew they did one for a member on a different fourm I am on.
They again if their gauge will not work with your sender why could it not be changed out for one that would?
After all you are going with custom gauges that could look close to factory.
It was just a option that may work?
Dave ----
When you did your 70 AMC back in 2011, you matched your fuel gauge to the sending unit's nominal ohm range of 240-33 ohms. That's perfect. However, our stock trucks don't talk ohms/resistance, so that process simply just doesn't apply here. Regardless of protocol, the sender and gauges need to match. Yes, one may be able to find a replacement fuel level sending unit that speaks ohms/resistance in a range for a desired aftermarket gauge that speaks the same.
Being they make the gauges they may be able to replace the guts to work with your sender so would need to talk to them.
The worst is they cant but till asked you dont know.
I like to check out what others are doing as it lets you see what they do to over come something that may help me down the road.
I am just passing on what I found on custom gauges that may or may not help others.
Just a thought you guys still run 6 volts I wounder if the Speed Hut gauges work on 6 volts?
So it could all be for not
What do you guys do when swapping to 12 volts and the gauges use resisters.
Dave ----
1) One uses stock gauges and stock sending units. (King-Seeley distometers)
1a) A voltage dropper/regulator is used on 12V systems with stock 6V gauges. (Ford actually used 6V gauges with voltage droppers on their 12V trucks for a number of years!)
2) Go complete aftermarket buying matching gauges and senders (Ohm/Resistance). These are usually for 12V systems, but I imagine 6V ones exist. Some aftermarket options are made to look like stock gauges if one desires that aesthetic.
Thanks for that information
See I did learn something over here
Is it just one that you need and run the supply in to it and then out to the gauges or one for each gauge?
How hard is it to find them dropper regulators if you need one or ?
Dave ----
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