Let's Talk Gauges...

I love it when you talk dirty.

 

So here's my 2 cents,I have electric gauges mostly, found them close enough in accuracy for me, prefer a volt meter because it shows condition of battery when you turn the switch on, you can see if the charging system is working like a amp gauge and simpler wiring( in my case simple is good) have a vacuum gauge as a reference to see how things are running....have a circuit breaker on the feed wire close to the battery ,mostly incase a wire should get the insulation get compromised some how, then everything is fused as per circuit....generstors mostly......I like to think I control the excitement

 

I am with the pressure is pressure crowd . In my work (oil patch) we have to use a lot of instruments that have to be very accurate. A pressure gage has no flow, which if it did, then if the tubing was too small, then it would effect the reading, but there is no flow, so the size of the feed to the instrument really does not make any difference. If the pressure was making drastic quick changes, then the size feeding it could make a difference in the time the gage changed. With our instruments and there is a chance the pressure will make quick drastic changes and slam the instrument then we will use "snubbers" at the instrument to protect it. They are just real fine needle valves that slow down the rapid change to the instrument. A example is on a gas compressor. As the piston goes back and forth the pressure to the gage goes up and down very quickly causing the needle on the gage to keep sweeping back and forth wearing out the gage. and "snubber" saves the gage. Remember Pascal's law!!!

By the way I changed the oil gage from my factory installed electric to a liquid one back in 1971 and used 1/8" copper tubing and still have it and have never had a problem. Close to where it attaches to the engine I have a couple of loops in it to take care of the engine movement and also where it comes through the fire wall.

Mike

 

Pascal's Law (The principle of transmission of fluid-pressure)

And don't forget Cole's Law. (Chopped cabbage and mayonaise. )

 

Looking at a speed hut gauge. How did you cap the hole where the speedo cable enters the t-case?

 

A bit of RTV over the opening on the original threaded cap works fine.
Or you could get fancy and trim a little block off plate for the cap.

 

back to original fuel and temp gauges for me.