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06-04-2014, 02:05 PM | #1 |
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Join Date: Mar 2014
Location: Olympia Washinton
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Electric fan questions!
So I'm going to get an electric fan setup in my c10 and was wondering why everyone runs them on a thermostat and such instead of just hot wiring it to a switch in the truck so you can just turn it on when you need to?
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06-04-2014, 02:27 PM | #2 |
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Join Date: Jun 2010
Location: Upland Ca
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Re: Electric fan questions!
I run mine on a thermostat so they go on and off as required automatically, I don't want to be watching the a gauge that may or may not be accurate. I know a few guys that have forgotten and turned them on when they smelled antifreeze. One guy only lost a hose and some antifreeze but was stuck on the side of the road, the other lost a head gasket for sure, maybe a head, he has not taken it apart yet.
For what it's worth, I've run my dual electric fans for 2-3 years now. I've had two relay failures and one fan motor failure in the last year. I'm likely going back to the stock clutch fan set up.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
06-04-2014, 02:30 PM | #3 |
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Join Date: Mar 2014
Location: Olympia Washinton
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Re: Electric fan questions!
I've done just a switch with other cars as well just curious. How did you run your thermostat? I'm going to get rid of my clutch fan and just run electric and I saw the jeep grand Cherokee fan setup I might just run that in my shroud alone. Is this good or bad idea?
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06-04-2014, 02:43 PM | #4 |
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Join Date: Apr 2014
Location: CA
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Re: Electric fan questions!
Use a thermostat switch. If will allow fast warmups. Or wire always on with ignition. I wouldn't use a simple on/off switch, like mentioned you'll forget one day and it can get ugly quick.
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06-04-2014, 02:47 PM | #5 |
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Join Date: Jun 2010
Location: Upland Ca
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Re: Electric fan questions!
I'm using a Derale controller part number 16789 right now.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
06-04-2014, 02:58 PM | #6 |
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Join Date: Mar 2012
Location: New Orleans, La
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Re: Electric fan questions!
I am WWWAAAAYYYYY too dumb and forgetful for that. That is a sure fire way to have me calling AAA for a tow.
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It's not that I am apathetic, I just don't care. If your life is a joke, it appears death will be your punchline. |
06-04-2014, 03:00 PM | #7 |
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Join Date: May 2012
Location: Okmulgee, OK
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Re: Electric fan questions!
http://www.summitracing.com/parts/sum-890015
Here's one from Summit. Might be able to shop around and find just the thermostat switch cheap and supply your own relay and wiring if you needed to. |
06-04-2014, 03:19 PM | #8 |
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Join Date: Jun 2011
Location: United States
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Re: Electric fan questions!
Another vote for a thermostat switch. The fans on my supercharged LS rarely if ever run over speeds of 30-40 mph as the air flow through the radiator is sufficient enough to cool.
Fans, batteries and alternators are expensive, why further tax them by running the fan full time? |
06-04-2014, 04:57 PM | #9 | |
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Re: Electric fan questions!
Quote:
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'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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06-04-2014, 06:30 PM | #10 |
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Re: Electric fan questions!
Nope. I can but chose not to for simplicity sake. I installed a thermostatic switch in the bottom of the radiator (near the outlet) and wired it directly to the fan relays.
Originally I was going to wire them to the Holley Dominator ECU and let that control them but after speaking to Jeff at Painless, he recommended this as it's incredibly simple and consistent. |
06-04-2014, 08:49 PM | #11 |
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Re: Electric fan questions!
I wired mine with a thermostat and also tied it in to my A/C switch so when the A/C turns on the fans turn on also.
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Jason '70 C-10 short fleet 427BB TH400 (SOLD) '10 Ford F 350 '13 Ford RAPTOR 6.2 MY BUILD THREAD http://www.67-72chevytrucks.com/vboa...d.php?t=612623 |
06-04-2014, 08:54 PM | #12 |
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Location: Hammond, WI
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Re: Electric fan questions!
How did you tie it into the A/C? Do you have a wiring diagram, or maybe some pics?
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Mike 2001 Dakota R/T - Silver CC - 1 of 1671 •360 w/46RE •392 limited slip 1972 Chevy Suburban - Turquoise/Black 1969 Chevy C/10 - Blue LWB •350 w/ 700R4 •3.73 posi •PS PB A/C - SOLD Using your turn signal is not "giving information to the enemy" 67-72 FAQ |
06-04-2014, 09:03 PM | #13 |
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Re: Electric fan questions!
I have Old Air Products A/C complete system installed on my truck instead of "factory" air. There is a wire that runs to the compressor that turns it on when the a/c is turned on, I just tied in to it. In your case you need to find the hot wire that runs to your a/c compressor and then you tie in your fans. I also forgot to say that I do have a fan control mounted beside the radiator. Hope this helps..
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Jason '70 C-10 short fleet 427BB TH400 (SOLD) '10 Ford F 350 '13 Ford RAPTOR 6.2 MY BUILD THREAD http://www.67-72chevytrucks.com/vboa...d.php?t=612623 |
06-04-2014, 09:59 PM | #14 | |
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Location: Hammond, WI
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Re: Electric fan questions!
Quote:
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Mike 2001 Dakota R/T - Silver CC - 1 of 1671 •360 w/46RE •392 limited slip 1972 Chevy Suburban - Turquoise/Black 1969 Chevy C/10 - Blue LWB •350 w/ 700R4 •3.73 posi •PS PB A/C - SOLD Using your turn signal is not "giving information to the enemy" 67-72 FAQ |
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06-04-2014, 10:01 PM | #15 |
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Location: sutton WV
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Re: Electric fan questions!
Yes, I bought a electric fan relay kit for my fans.
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Jason '70 C-10 short fleet 427BB TH400 (SOLD) '10 Ford F 350 '13 Ford RAPTOR 6.2 MY BUILD THREAD http://www.67-72chevytrucks.com/vboa...d.php?t=612623 |
06-04-2014, 10:03 PM | #16 |
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Location: United States
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Re: Electric fan questions!
Use a trinary switch...
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