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Old March 23rd, 2006, 07:12 PM   #1
wester
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Going to an electric fan. Thermal switch Q

I'm going to be putting in a 16" "S" blade fan. My problem is that I'm not sure where to put the thermal switch. Could I just take my factory temp sensor out and run a nipple out of that hole with a "T" on it to put them both in, or would that create an air pocket so they wouldn't read right?
Also what temp switch would you recommend, I think the kit I got has a 150Deg. switch.
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Old March 23rd, 2006, 07:24 PM   #2
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if your running a cooling fan you want the fan to come after the T stat opens, if your T stat is opening at 195* a 150* switch will just waste energy and ruin the fan by running way to long. if your putting in a switch make it about 20 degrees higher then the T stat so its letting the radiator do its job. the second thing is either put the switch down into the coolant or find a spot somewhere else. the heads run about 15-30 degrees warmer so the switchs there are like 230* to be most effective.
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Old March 23rd, 2006, 09:08 PM   #3
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http://www.jegs.com/webapp/wcs/store...tegoryId=13393

Flex-a-lite Black magic fan. Highest CFM on the market and has it's own shroud.

Comes with a thermostat and probe that goes into the radiator fins near the inlet. Its an adjustable switch so you can have the fan turn on just as the engine T-stat opens, or you can adjust it higher or lower based on the time of year.
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Last edited by amc78cj7; March 23rd, 2006 at 09:10 PM.
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Old March 24th, 2006, 06:34 AM   #4
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Thanks for the link, but I already have a fan and relay kit. I just wanted a little input on themal switch placement.
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Old March 24th, 2006, 01:26 PM   #5
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Well the probe for the thermostat switch on the black magic fan goes into the fins of the radiator just next to the inlet hose. That way when the engine T-stat opens and hot fluid poors into the radiator the fan turns on. Of coarse that was already stated in my first reply. Maybe I'm not understanding the question?
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Old March 24th, 2006, 02:10 PM   #6
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I have a threaded type thermal switch, but I don't see where I can put it, other than the hole where the original temp sensor is. That Black Magic one would be nice but I didn't see anywhere at Jeggs where it was sold separately.

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I think I found it. Thanks.

Last edited by wester; March 24th, 2006 at 02:18 PM.
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