Revisiting my e30 fuel sender to autometer gauge question...

[Justin B]

Alright, skipping past all the extra numbers, an e30 fuel sender gauge at empty reads 60ohms resistance, and full, presumably 8.25ohms resistance (held upside down it's 4.5, but for the sake of this project, it's 8.25, and most likely that's close enough).

In order to use an autometer gauge that I'm looking at, I need to raise the resistance -exactly- 4x, at every point throughout the 60-8.25ohms.

Unfortunately it's not a fixed offset which would make this otherwise cake, but I'm hoping this is still better off than what I thought I was sunk in before.

I can't get my head around the problem, but it APPEARS to me a hell of a lot easier than it seemed last time I posted about it. Can anybody put their heads into this and help me figure out a solution?

[Justin B]

Ok OOPS on the terminology, but this was suggested to me elsewhere -

Gauges aren't measured in s. By "33 full", do you mean that it reads full when connected to 12V via a 33 resistor? If this is the case then the gauge needs 400mA for full deflection. Your sender being 8.25 would require 3V to deliver 400mA. Try running it on 3V and see if that works.

Too bad I don't have the gauges yet. Sounds logical to me though, think that would be the proper way to handle this?

[Justin B]

mmm fuckit. Im going nowhere fast on this one. The gauge I want has 4 in one bezel, and all four use the same +12v input. Autometers are sealed so i cant crack it open and separate one 12v for that particular gauge and reduce it, and a shunt would be rather unsafe. UUUuuuuuuuuuhhhh. Thinking out loud I guess.

[Alpine 7even]

Ever figure this out?