Thread: Wiring a fan thermostat?
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05-10-2015 10:29 AM #1
Wiring a fan thermostat?
I mentioned my SBC '32 roadster that is new to me in another thread. Here I'd like to get some advice on an elec fan thermostat.
Currently the car's fan is wired to come on with the ign switch. I also believe the car doesn't have a coolant thermostat in it. It takes a while to warm up and usually operates at about 140 degrees according to the Dolphin temp gauge. In addition to flushing the coolant and adding a thermostat, I'd like to install a thermostat for the fan so it only runs when needed.
Some of the cheaper ones I'm seeing have a probe you are supposed to "insert" into the radiator fins. The fins on the radiator are so close together, I don't see how this would work without cracking the fins.
Are there any kits you can recommend that would simply use the existing temp sensor in the manifold that goes to my temp gauge?
As a side note, let me say I appreciate the hospitable attitude that seems to be a part of this forum. Lots of forums tend to dogpile on new members that ask newbie questions. Thank you.
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05-10-2015 12:48 PM #2
I'm using the Dakota Digital controller on my fans, it will operate two separate fans or one 2 speed fan. Completely programable for temps and it works off of the motor's existing sending unit (no probe). I have a 160° thermostat and let the fans regulate the temps from there. I'm real pleased with how it works for my fans.
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05-10-2015 01:18 PM #3
I've always used thermal switches to control a relay, which controls the fan.
Perhaps you have a plugged-off coolant port where you could install a temp switch. The rest is easy..
Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
EG
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05-10-2015 01:20 PM #4
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05-10-2015 01:54 PM #5
I'm glad you found what your searching for, what temp range will you use for a thermostat?
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05-10-2015 09:16 PM #6
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05-10-2015 09:32 PM #7
I'm running a 180 degree stat, but the actual temperature coming off of the water passages near the head is right at 190 degrees. I let the thermostat handle loads up to 195 degrees, where the fan comes on low speed. If the temps get up to 210 degrees the high speed kicks in, as it does if the AC is turned on. My fan rarely runs.Roger
Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.
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05-11-2015 03:07 PM #8
I run a 180 also. and my temp switch is a 190. My fan runs when I'm in town.
I wouldn't run one any cooler! To cold (like your 140 - 150 degrees) is more harmfull than good.
Thank you Roger. .
Another little bird