Electric Fans - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68gmcjon · 07-07-2003, 02:00 PM

What size of electric fan(what cfms) would i need to keep my 402 cool? And what brands of fans do you guys recomend?

bouncytruck · 07-07-2003, 02:48 PM

Wes at Classicheartbeat has a nice dual fan set up...

smalliebob · 07-07-2003, 09:36 PM

I have a 70 GMC w/454 and the fans suggested by Bouncytruck work fine.

Also, what where did you get your headers? I just got some coated from Summitt that they assured me would work and they mount to low. I have a 5" drop in from and need something like a Chevelle shorty.

BH

minibike · 07-07-2003, 11:41 PM

I have a 94 camaro radiator and fans in mine...you could probably find some fans in a junkyard that would work well.

68gmcjon · 07-08-2003, 12:15 AM

I got my headers from jegs, they are Dynomax cerama coats, they hang down just barely if at all below the body

jjk3 · 07-08-2003, 01:12 AM

You might want to check into the Perma Cool fans that Jegs and Summit sell. The 18" fan flows 2500cfm. Also, is your 402 stock or high performance?

68gmcjon · 07-08-2003, 01:14 AM

high perf.
Headers, cam, intake, carb, ignition, etc.

Big69C20 Toy · 07-08-2003, 01:42 AM

I've got a black magic i got for my 572... but who knows if it'll cool well enough cuz the thing aint runnin yet

Figment412 · 07-09-2003, 08:38 PM

They have a fan on jegs that pulls 4600 cfm. I will either go with a 16" Spal fan or the dual 11" with 2780 cfm pull. Only thing about the dual is the high amp pull. I am also considering a direct bolt in like this one one, but only pulls 2100 CFM

68gmcjon · 07-09-2003, 08:42 PM

how many cfms do i need to keep my engine cool in town goin bout 20-30 mph

Figment412 · 07-09-2003, 08:50 PM

Depends, what kind of radiator do you have?

68gmcjon · 07-09-2003, 08:52 PM

i have a 4 core radiator

Figment412 · 07-09-2003, 08:59 PM

Copper or aluminum?

68gmcjon · 07-09-2003, 09:13 PM

copper

Lumpy · 07-09-2003, 09:19 PM

I was thinking of getting that setup that Figment put a link for. Should keep a mild 350 cool with a 3-core radiator without A/C right? Thanks.....Lumpy

Figment412 · 07-09-2003, 09:21 PM

Well it still depends on several factors, like if a shroud is used or if the fans cover the majority of the radiator. And also depends if your towing. I would think that 2500 cfm should be plenty for just driving around, maybe get away with a little less.

68gmcjon · 07-09-2003, 09:21 PM

Yeah i saw that set up in classic trucks but 300 dollars and 2100cfm isnt much for that much money, but it does bolt up directly which i like

Lumpy · 07-09-2003, 09:26 PM

Here is a dual fan setup for 67-72 trucks. I like how all the wiring is pretty much done and bolts right to the shroud holes. Lumpy

http://www.oldairproducts.com/catalo...oducts_id=2375

Figment412 · 07-09-2003, 09:28 PM

Quote:

Originally posted by Lumpy
I was thinking of getting that setup that Figment put a link for. Should keep a mild 350 cool with a 3-core radiator without A/C right? Thanks.....Lumpy

Should not be a problem at all.

68gmcjon · 07-09-2003, 09:47 PM

Thankx for all the help!

07-07-2003, 02:00 PM	#1
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	Electric Fans What size of electric fan(what cfms) would i need to keep my 402 cool? And what brands of fans do you guys recomend? __________________ 1968 GMC Original A/C, bucket seats, PS,PB 396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression Alltogether 411HP and 446ft/lbs Dana 60 w/ 3.54 gears Turbo 400 tranny Why would you have anything other than a big block? HAHA

07-07-2003, 02:48 PM	#2
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,038	Wes at Classicheartbeat has a nice dual fan set up... __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

07-07-2003, 09:36 PM	#3
smalliebob Registered User Join Date: Jun 2003 Location: Madison,Al Posts: 5	Fans I have a 70 GMC w/454 and the fans suggested by Bouncytruck work fine. Also, what where did you get your headers? I just got some coated from Summitt that they assured me would work and they mount to low. I have a 5" drop in from and need something like a Chevelle shorty. BH __________________ 70 GMC short/wide 77 GMC Sub 86S10 V8 93 GMC Sub 90 MB 300SL (Pop's toy) 96MB S320 (Mom's ride)

07-07-2003, 11:41 PM	#4
minibike Registered User Join Date: Jun 2002 Location: Lafayette, LA Posts: 500	I have a 94 camaro radiator and fans in mine...you could probably find some fans in a junkyard that would work well. __________________ 69 SWB LT1/4L60E www.classicplace.com

07-08-2003, 12:15 AM	#5
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	I got my headers from jegs, they are Dynomax cerama coats, they hang down just barely if at all below the body __________________ 1968 GMC Original A/C, bucket seats, PS,PB 396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression Alltogether 411HP and 446ft/lbs Dana 60 w/ 3.54 gears Turbo 400 tranny Why would you have anything other than a big block? HAHA

07-08-2003, 01:12 AM	#6
jjk3 It's just a check engine lamp. Join Date: Apr 2001 Location: Melbourne, FL Posts: 311	You might want to check into the Perma Cool fans that Jegs and Summit sell. The 18" fan flows 2500cfm. Also, is your 402 stock or high performance? __________________ Active Inliner---bigchevy66 68 SWB Stepside 250 L6/3 on the floor/ Hedman headers, HEI, MSD 6A box, K&N filter, Offy intake and Edelbrock 600cfm 4 barrel Soon to have: WC T-5 five speed 66 SWB Stepside-undergoing restoration

07-08-2003, 01:14 AM	#7
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	high perf. Headers, cam, intake, carb, ignition, etc. __________________ 1968 GMC Original A/C, bucket seats, PS,PB 396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression Alltogether 411HP and 446ft/lbs Dana 60 w/ 3.54 gears Turbo 400 tranny Why would you have anything other than a big block? HAHA

07-08-2003, 01:42 AM	#8
Big69C20 Toy Livin' it up. Join Date: Nov 2001 Location: Richland, MI Posts: 2,212	I've got a black magic i got for my 572... but who knows if it'll cool well enough cuz the thing aint runnin yet __________________ -Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.

07-09-2003, 08:38 PM	#9
Figment412 Registered User Join Date: Dec 2002 Location: Fort Wayne, IN Posts: 108	They have a fan on jegs that pulls 4600 cfm. I will either go with a 16" Spal fan or the dual 11" with 2780 cfm pull. Only thing about the dual is the high amp pull. I am also considering a direct bolt in like this one one, but only pulls 2100 CFM __________________ Save your money and do it right the first time. 1968 GMC short bed 1972 Cab 74 SB Chevy running gear

07-09-2003, 08:42 PM	#10
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	how many cfms do i need to keep my engine cool in town goin bout 20-30 mph __________________ 1968 GMC Original A/C, bucket seats, PS,PB 396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression Alltogether 411HP and 446ft/lbs Dana 60 w/ 3.54 gears Turbo 400 tranny Why would you have anything other than a big block? HAHA

07-09-2003, 08:50 PM	#11
Figment412 Registered User Join Date: Dec 2002 Location: Fort Wayne, IN Posts: 108	Depends, what kind of radiator do you have? __________________ Save your money and do it right the first time. 1968 GMC short bed 1972 Cab 74 SB Chevy running gear

07-09-2003, 08:52 PM	#12
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	i have a 4 core radiator __________________ 1968 GMC Original A/C, bucket seats, PS,PB 396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression Alltogether 411HP and 446ft/lbs Dana 60 w/ 3.54 gears Turbo 400 tranny Why would you have anything other than a big block? HAHA

07-09-2003, 08:59 PM	#13
Figment412 Registered User Join Date: Dec 2002 Location: Fort Wayne, IN Posts: 108	Copper or aluminum? __________________ Save your money and do it right the first time. 1968 GMC short bed 1972 Cab 74 SB Chevy running gear

07-09-2003, 09:13 PM	#14
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	copper __________________ 1968 GMC Original A/C, bucket seats, PS,PB 396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression Alltogether 411HP and 446ft/lbs Dana 60 w/ 3.54 gears Turbo 400 tranny Why would you have anything other than a big block? HAHA

07-09-2003, 09:19 PM	#15
Lumpy 2 tons of fun Join Date: Dec 2001 Location: Central, Ca Posts: 194	I was thinking of getting that setup that Figment put a link for. Should keep a mild 350 cool with a 3-core radiator without A/C right? Thanks.....Lumpy __________________ 67 Chevy,Short/Fleet,350,Saginaw 4-Speed,Lowered 4x2,small window,P/S,Edelbrock Intake/Carb,HEI,Gear Drive,Crane Cam 274H Three Rivers, Ca Pics at: http://www.cardomain.com/id/lumpy454 Last edited by Lumpy; 07-09-2003 at 09:24 PM.



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07-09-2003, 09:21 PM	#16
Figment412 Registered User Join Date: Dec 2002 Location: Fort Wayne, IN Posts: 108	Well it still depends on several factors, like if a shroud is used or if the fans cover the majority of the radiator. And also depends if your towing. I would think that 2500 cfm should be plenty for just driving around, maybe get away with a little less. __________________ Save your money and do it right the first time. 1968 GMC short bed 1972 Cab 74 SB Chevy running gear

07-09-2003, 09:26 PM	#18
Lumpy 2 tons of fun Join Date: Dec 2001 Location: Central, Ca Posts: 194	Here is a dual fan setup for 67-72 trucks. I like how all the wiring is pretty much done and bolts right to the shroud holes. Lumpy http://www.oldairproducts.com/catalo...oducts_id=2375 __________________ 67 Chevy,Short/Fleet,350,Saginaw 4-Speed,Lowered 4x2,small window,P/S,Edelbrock Intake/Carb,HEI,Gear Drive,Crane Cam 274H Three Rivers, Ca Pics at: http://www.cardomain.com/id/lumpy454

07-09-2003, 09:47 PM	#20
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	Thankx for all the help! __________________ 1968 GMC Original A/C, bucket seats, PS,PB 396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression Alltogether 411HP and 446ft/lbs Dana 60 w/ 3.54 gears Turbo 400 tranny Why would you have anything other than a big block? HAHA

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