Pics and details on Spectra Fuel gauge sending unit/hanger

["Turbo-T"]

I just picked up one of these last night after placing my order on Monday...looks nice, anyone know what size gauge wire is used from the pigtail connector to the bulkhead?

 

[Racetronix]

i just picked up one of these last night after placing my order on monday...looks nice, anyone know what size gauge wire is used from the pigtail connector to the bulkhead?

16

 

[just plain john]

I've never understood why there's such a small wire in tank when it's common to hot wire a #10 wire to feed it.

 

[aminga]

I've never understood why there's such a small wire in tank when it's common to hot wire a #10 wire to feed it.

Simple physics. Resistance is proportional to length and inversely proportional to area. The 4" long wire in the tank can be 1/25th the area of the 108" long wire feeding the tank and have the same resistance. (lengths are approximate but you get the idea)

 

["Turbo-T"]

Simple physics. Resistance is proportional to length and inversely proportional to area. The 4" long wire in the tank can be 1/25th the area of the 108" long wire feeding the tank and have the same resistance. (lengths are approximate but you get the idea)

If that's the case then is it pointless to upgrade the little itty bitty wires in the tank with a bigger gauge wire like say 16?

 

[turbo nasty]

OK so Ive ran the tank down and the sender does NOT read the same as factory.

This meaning that the factory gauge would go past Full whan the tank was full but be accurate when empty.

The spectra does the opposite. When tank is full, the gauge reflects almost on Full which is nice but the other end of the scale is off and when almost on empty you still have 5 or so gallons in the tank.

I figured as much when i was on a 3 hour trip and it typically is little below 1/2 when completed and it was below 1/4 since the install of the new sender.


Filled the GN up with it near Empty and it took 11ish gallons.

Would like to put a factory hanger next to the Spectra one and see the float swing geometry. Probably could bend the float arm and fix the reading low issue IMO simce the ohm meter reads correct on the Spectra through ts sweep it would have to be the geometry/positioning.

 

[Pittsburghkid]

found an answer to some of the questions on this thread.

fuel sending unit - TurboBuicks.com

rockauto.com also has them for $95

 

[2QWIK4U]

OK I just got my tank yesterday and have the same sending unit from Oreilly, $107.25. Now, I still have hot wire kit on car from the double pump set up I had,my question is does the wiring on the new sending unit need to be upgraded or not.

 

[Racetronix]

http://www.turbobuick.com/forums/ad...-stainless-high-performance-fuel-senders.html