Help. GTE Conversion Complete, except Temp Gauge.
#32
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Originally posted by bmsport
And so the saga of the temp gauge continues. I bought a potentiometer yesterday, gonna try finding the correct resistance for the supra sensor.
And so the saga of the temp gauge continues. I bought a potentiometer yesterday, gonna try finding the correct resistance for the supra sensor.
let me know what you find out. Too bad some of the SC300TT fellas that have working temp gages won't tell how they did it
#33
Its weird, some people have no problems wiring in the 330 ohm resistor, but some do. And yeah, thats how the potentiometer works, kinda like dialing in the correct resistance while someone watches the gauge.
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Originally posted by bmsport
Its weird, some people have no problems wiring in the 330 ohm resistor, but some do. And yeah, thats how the potentiometer works, kinda like dialing in the correct resistance while someone watches the gauge.
Its weird, some people have no problems wiring in the 330 ohm resistor, but some do. And yeah, thats how the potentiometer works, kinda like dialing in the correct resistance while someone watches the gauge.
The problem with having wrapped it so heavily in teflon and then adding silicon is that the unit wasn't grounding properly. This is a one-wire sensor that gets ground from being threaded into the water neck. Well... I had hardly any grounding. I thought the sensor wouldn't work at all without grounding, turns out it works but produces the wrong signal (doesn't really make sense to me).
Anyway, I tested this without unscrewing the sensor by strapping some wire from the sensor hex-head to the water neck. When that gave me the right reading, I did something you'd consider lazy I soldered the wire from the sensor to the water neck I did this because my sensor doesn't leak water and I want to keep it that way.
Also played some more with the stock supra sensor and finally found that 290ohms gives the right reading on the gage (for me, anyway). I had to get this using a 10, 100, and 180 resistor in-line.
Hope this helps someone.
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Originally posted by bmsport
Yeah, that would be me I'm gonna try and get that combination of resistors tommorrow and test it out. Thanks bro.
Yeah, that would be me I'm gonna try and get that combination of resistors tommorrow and test it out. Thanks bro.
I'm doing all of this because my modified water neck finally sprung a very, very small leak. So I've installed an unmodified water neck with the two original sensors mounted. Only the temp sensor is connected, the sender unit is there as a plug only. I've extended the sender unit wire to connect to the GE sender that i screwed into my radiator. I also used this as opportunity to install my TRD Japan 160 degree thermostat.
I'll let everyone know how this turns out.
#39
Well, i installed the GE sensor in the GTE water neck and low and behold its still pegged on hot! I wired a 270 ohm resistor inline afterwards and it pegged on cold. Somehow there is resisitance within the harness itself. I could have just used the stock TT sensor. This is such a pita.
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Originally posted by 5spdSC300
a little OT but does anyone know if there are any negative affects using the stock sc radiator instead of the TT supra?
a little OT but does anyone know if there are any negative affects using the stock sc radiator instead of the TT supra?
I DID, however, install a TRD Japan 160 degree thermostat (recently) and a TRD 1.3bar (18psi) radiator cap for peace of mind.
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Originally posted by bmsport
Well, i installed the GE sensor in the GTE water neck and low and behold its still pegged on hot! I wired a 270 ohm resistor inline afterwards and it pegged on cold. Somehow there is resisitance within the harness itself. I could have just used the stock TT sensor. This is such a pita.
Well, i installed the GE sensor in the GTE water neck and low and behold its still pegged on hot! I wired a 270 ohm resistor inline afterwards and it pegged on cold. Somehow there is resisitance within the harness itself. I could have just used the stock TT sensor. This is such a pita.
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Originally posted by bmsport
I got one with a block that goes in the actual hose. It'll probably read more accurate anyways.
I got one with a block that goes in the actual hose. It'll probably read more accurate anyways.
I meant where in the car (interior) did you mount it