3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Hypertech Fan Switch

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Old 03-08-2004, 10:42 PM
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Hypertech Fan Switch

which do you think i should get..
a fan switch that turns on at 200 and off at 185 or a fan switch that turns on a 176 and turns off a 166 ?
thanks
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Old 03-08-2004, 10:55 PM
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What thermo?
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Old 03-08-2004, 11:11 PM
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the one that turns off at 185 i have the same fan switch and she never turns off except on highway speeds, but she never rises about a quater on the guage either best thing i ever bought formy camaro
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Old 03-09-2004, 03:12 AM
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i'd rather just program it in the prom to come on at w/e degree i think it should come on at... but that's just me
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Old 03-09-2004, 01:41 PM
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Originally posted by dj haf
i'd rather just program it in the prom to come on at w/e degree i think it should come on at... but that's just me
I don;t think we are talking about the same thing here. One fan is controlled by the ECM and can be programmed in the EPROM to come on at a certain temp. The other is controlled by the sensor on the pass side of the head. No ECM change can control that fan.
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Old 03-09-2004, 04:50 PM
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your right... my bad.

u know what i did? instead of installing a switch, i just grounded the wire for the passenger side fan on the relay so that it's always on. big deal if it dies on me... can get it for 10$ at the junk yard it's cheaper than the switch, and it NEVER goes past 170, and i live in MIAMI. when it used to get close to 100 (in the summer), it would start to move a little past the 170 mark... but all i'd have to do is make it to 50mph before it started to go back down.... and anyways, if it went to 180, i would still concidered it safe

i remember it going back around 215 once and i took a crap... popped the hood and noticed that the cap covering the air tube came off and was pouring hot exhaust fumes into the engine bay... made my car run like sh*t, thats when i noticed the temp and decided to take a look see under the hood.
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Old 03-09-2004, 09:09 PM
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I would like to use a 160 thermostat. Do they make on that turns on at 185 and turns off at 175? I think that would be a good temp.
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Old 03-10-2004, 02:23 AM
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if you live in NJ, get a 180. the 160 is too low for you.
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Old 03-10-2004, 12:25 PM
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I just ordered the 176 on and 160 off switch. I think its coming today so I will install it and tell you how it is. I live in Northern Va so I get some cold weather but its not usually too bad.
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Old 03-10-2004, 09:21 PM
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Does any company make a fan switch that turns on at 185 and off at 175? I think this is a good temperature for my area. I think that 200-185 would be to hot but 170-160 would be too cold.
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Old 03-10-2004, 09:30 PM
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i think anything lower than 150 is too cold... 170 is just about right
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