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11-19-2021, 06:10 PM
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#1 |
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laying low
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,947
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efan add
1991 C1500. I'm giving thought to swapping from stock clutch fan to an aftermarket e fan. Could I tap into one of the stock coolant temp sensors wires to signal the fan controller, without affecting the temp gauge or the ecm?
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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11-19-2021, 06:47 PM
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#2 |
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State of Confusion!
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,611
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Re: efan add
I would think you would need the ecm to trigger it. Putting a double load onto the input of the ecm will probably alter things and effect the gauge. I am just guessing with theory, I never tried one or saw one that didn't have its own temp sensor for the fan.
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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11-19-2021, 07:13 PM
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#3 |
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Senior Member
Join Date: Dec 2009
Location: TN.
Posts: 7,701
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Re: efan add
This guy has got a 3 part video.
That might give you some idea's. Link: https://www.youtube.com/watch?v=fLIMYkCqBYc
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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11-19-2021, 07:44 PM
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#4 |
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Registered User
Join Date: Apr 2013
Location: GUNTERSVILLE
Posts: 621
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Re: efan add
Nope.
You will have to add a temperature on/off switch in a water passage. The existing is a sensor, not an on/off switch. |
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11-19-2021, 11:28 PM
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#5 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,947
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Re: efan add
Oh that was entertaining.
 Sensor instead of switch. Yes I can see that. Well it's something to think on. Thanks
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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11-20-2021, 06:51 PM
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#6 |
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Registered User
Join Date: Jan 2006
Location: Big Pine Key, FL
Posts: 745
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Re: efan add
You need an aftermarket fan controller. Some of the ECMs have the ability to control fans by adding code, but if you're not familiar with burning chips then the aftermarket controller is the way to go.
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Mike Last edited by sntrym95; 11-21-2021 at 09:47 PM. |
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11-20-2021, 08:45 PM
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#7 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,947
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Re: efan add
I've got a cheap after market controller out there. But I did just put on a new fan clutch today so I'll see how it runs. I'm not impressed with the low cfm the after market efans produce though. So I'm on the fence. I don't think this radiator is wide enough to use a later year factory dual fan setup or I'd go that way. Just to be clear, I don't have an over heating issue. I'd just like to go efan to let it warm up faster and run quieter. The OE fan clutch may have been the original and it was locked up non stop creating a lot of noise and engine drag.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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