electric fan in a 84 gmc k1500 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tai6mai9shu · 03-29-2006, 03:27 AM

Hey guys, i have a weird thought. im sick and tired of hearing the darn fan on the motor turn as fast as the motor, so im wondering is there any options of me being able to put an electric fan on there? yes i know i will have to turn it on and off manually but is there any options in doing it? would it have to be a certian size? any idea's would be apprecated. Thanks
Don

gchemist · 03-29-2006, 03:58 AM

If you hear the fan turn as fast the motor the clutch is KAPUT!!! Replace the fan clutch. Save your gas milage!!!
I run dual 14" fans on my truck.

tai6mai9shu · 03-29-2006, 10:29 AM

How does the fan that is on there supposed to run? is the clutch only supposed to enguage after a certian rpm? or what? where did you get your dual fans? Im looking to try and to it inexspensive,

Wild83C10 · 03-29-2006, 09:40 PM

The black magic electric fan works great and isn't that expensive. I am using it with 420 hp and it keeps my truck within 5 to 10 degrees of the thermostat and within 20 degrees during really hot days over 90 degrees. All my buddies are using it too and most of them have 500 or more HP big and small blocks.

tornado_tech · 04-06-2006, 08:02 AM

I run the Flex-a-lite 290 series on mine but I also got the big diesel radiator. Since you probably got the smaller radiator, the Flex-a-lite 285 would be better suited. I have also heard of people using 2 factory electric fans off of front-drive cars in junkyards and wiring them up manually for the most cheapest version available.

Chevrolet4x4s · 04-22-2006, 07:12 PM

Anyone make an adjustable thermostat switch so that I could get it to turn on at 160 or so if I would do an electric fan swap (at $2.95 a gallon and 12 mpg every mpg counts)?
Thanks
Shane

gchemist · 04-23-2006, 12:10 AM

Yea, you can find one at www.jegs.com or www.summitracing.com
I have mine set at 190. Turns off at 180. I run a 160 thermostat, 454 aluminum radiator and dual 14" fans. If the truck is moving the airflow to a big radiator is enough. No need to kill the alternator by running fans all the time.

SSC's76 · 04-23-2006, 11:21 AM

I kept my fan shroud and using a stock electric fan from a 90's 3.3L Buick with AC. Keeping the shroud and mounting the fan inside allows for a greater vacuum to be pulled through the radiator more evenly. The stock fans from cars with AC have a slightly better motors yet all cost the same. I use an Imperial adjustable fan switch which you can find at any parts store for $25 and less. I set mine to turn on at 200* since there’s no point in having the fan kick on before the T-stat starts to open and causing strain on the alternator eating up more gas then needed. This switch will allow the fan to cycle on and off which the one I use in my firebird doesent even though they should be the same part. The fan cost me nothing but you can get them at bone yards for $35.

piecesparts · 04-23-2006, 11:14 PM

There are numerous fan setups for the radiators of our trucks. Flex-i-Lite has two or three and SPAL has a few. I have a dual SPAL 11" fan setup on my 84 pickup and it works great, as a matter of fact I just put the same setup on my 91 Silverado, too.

There are as many different suppliers of fan control units as there are fans. I am running the SPAL FAN-PWM unit (available from Summit racing under a Be-Cool number) or try this outlet for a fan switch. http://www.centechwire.com/

There are a fair amount of fan switches listed in Summit and Jegs, also.

03-29-2006, 03:27 AM	#1
tai6mai9shu Registered User Join Date: Mar 2006 Location: Williamsport PA Posts: 13	electric fan in a 84 gmc k1500 Hey guys, i have a weird thought. im sick and tired of hearing the darn fan on the motor turn as fast as the motor, so im wondering is there any options of me being able to put an electric fan on there? yes i know i will have to turn it on and off manually but is there any options in doing it? would it have to be a certian size? any idea's would be apprecated. Thanks Don

03-29-2006, 03:58 AM	#2
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: electric fan in a 84 gmc k1500 If you hear the fan turn as fast the motor the clutch is KAPUT!!! Replace the fan clutch. Save your gas milage!!! I run dual 14" fans on my truck. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-29-2006, 10:29 AM	#3
tai6mai9shu Registered User Join Date: Mar 2006 Location: Williamsport PA Posts: 13	Re: electric fan in a 84 gmc k1500 How does the fan that is on there supposed to run? is the clutch only supposed to enguage after a certian rpm? or what? where did you get your dual fans? Im looking to try and to it inexspensive,

03-29-2006, 09:40 PM	#4
Wild83C10 Registered User Join Date: May 2002 Location: NJ Posts: 910	Re: electric fan in a 84 gmc k1500 The black magic electric fan works great and isn't that expensive. I am using it with 420 hp and it keeps my truck within 5 to 10 degrees of the thermostat and within 20 degrees during really hot days over 90 degrees. All my buddies are using it too and most of them have 500 or more HP big and small blocks. __________________ 83 C10 Stepside (SOLD, it was a blast!) 383 MASS-FLO EFI/TKO II 600/3.90 Posi 10 bolt S475 and C4 DM running, fine tuning turbo= Douchebag Racing: Runs Fine all the Time

04-06-2006, 08:02 AM	#5
tornado_tech Registered User Join Date: Oct 2005 Location: Seneca, Kansas Posts: 38	Re: electric fan in a 84 gmc k1500 I run the Flex-a-lite 290 series on mine but I also got the big diesel radiator. Since you probably got the smaller radiator, the Flex-a-lite 285 would be better suited. I have also heard of people using 2 factory electric fans off of front-drive cars in junkyards and wiring them up manually for the most cheapest version available.

04-22-2006, 07:12 PM	#6
Chevrolet4x4s Registered User Join Date: Nov 2005 Location: WV Posts: 227	Re: electric fan in a 84 gmc k1500 Anyone make an adjustable thermostat switch so that I could get it to turn on at 160 or so if I would do an electric fan swap (at $2.95 a gallon and 12 mpg every mpg counts)? Thanks Shane __________________ 1993 K1500 350 5 speed 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ) Member#20327

04-23-2006, 12:10 AM	#7
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: electric fan in a 84 gmc k1500 Yea, you can find one at www.jegs.com or www.summitracing.com I have mine set at 190. Turns off at 180. I run a 160 thermostat, 454 aluminum radiator and dual 14" fans. If the truck is moving the airflow to a big radiator is enough. No need to kill the alternator by running fans all the time.

04-23-2006, 11:21 AM	#8
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	Re: electric fan in a 84 gmc k1500 I kept my fan shroud and using a stock electric fan from a 90's 3.3L Buick with AC. Keeping the shroud and mounting the fan inside allows for a greater vacuum to be pulled through the radiator more evenly. The stock fans from cars with AC have a slightly better motors yet all cost the same. I use an Imperial adjustable fan switch which you can find at any parts store for $25 and less. I set mine to turn on at 200* since there’s no point in having the fan kick on before the T-stat starts to open and causing strain on the alternator eating up more gas then needed. This switch will allow the fan to cycle on and off which the one I use in my firebird doesent even though they should be the same part. The fan cost me nothing but you can get them at bone yards for $35. __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler

04-23-2006, 11:14 PM	#9
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: electric fan in a 84 gmc k1500 There are numerous fan setups for the radiators of our trucks. Flex-i-Lite has two or three and SPAL has a few. I have a dual SPAL 11" fan setup on my 84 pickup and it works great, as a matter of fact I just put the same setup on my 91 Silverado, too. There are as many different suppliers of fan control units as there are fans. I am running the SPAL FAN-PWM unit (available from Summit racing under a Be-Cool number) or try this outlet for a fan switch. http://www.centechwire.com/ There are a fair amount of fan switches listed in Summit and Jegs, also.



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