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Author Topic: Fan Temp/activation circuit...  (Read 331 times)

ForceFed86

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Fan Temp/activation circuit...
« on: October 21, 2011, 10:05:31 AM »
Any easy ways to manipulate the temp the fans come on at without buying a controller? Either through jakal software or manually? Do the fans use a different coolant temp sensor than the ECU? I've noticed a couple temps sensors around the thermostat and I only use one of them? COuld I use one to control fans? Or am I stuck buying a controller?

Thanks
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5 speed, 6/4 Bolt, 3K on rebuilt motor deck surfaced. Weisco 8.5:1 pistons, eagle rods. OEM crank, factory port 1g head, valve job, head surfaced , new valve stem seals,  3G lifters, BC 272 cams straight up, HX40 turbo, spearco FMIC. TT supra pump, 1000cc inj, E85, SD Jakal.

hakcenter

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Re: Fan Temp/activation circuit...
« Reply #1 on: October 21, 2011, 10:56:12 PM »
No ecu control. The plug at the bottom of the radiator is the thermo switch AFAIK.

You could make a tunable one with a thermistor and a couple of pots / relay. Didn't someone recently make one ?
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Mr Peepers

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Re: Fan Temp/activation circuit...
« Reply #2 on: October 22, 2011, 10:16:32 PM »
I've been looking through some sensor books and find a sensor similar to the stock one that switches on around 190-195.  No luck yet.  3/8" NPT would probably thread into where the a/c sensor goes in the thermostat housing instead of trying to find whatever size goes into the radiator.
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Stock 6 bolt, 272/272, 7 blade HX35 w/ twin scroll manifold, old unknown name top to bottom FMIC, 1200's, single 255, e85, LC-1.

HX35- 10.57@128.9 QTP Auto/10.9@135.9 street tire 28psi
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red97rum

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Re: Fan Temp/activation circuit...
« Reply #3 on: October 24, 2011, 05:19:40 PM »
Yeah it's the sensor in the bottom of the radiator I'm pretty sure.  Isn't this just a thermo switch?  Normally open and then close when it reaches a certain temp?

Couldn't you just use something cheap like this FAL electric fan controoler for $29? http://www.summitracing.com/parts/FLX-31147/?rtype=10



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