Fan Shopping - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1972RedNeck · 08-20-2011, 02:24 PM

I have decided (with a LOT of help from other members) that I should get a 7 blade clutch fan. I will probably get one from Summit Racing. Is there different temperature clutches? What is the best type of clutch (i.e. thermal, non-thermal, heavy duty thermal, severe duty thermal)? What is the best brand of fan? What is the best brand of clutch? I just saw an exploded clutch fan and don't want that to happen.

Thanks for all of your help.

**Stocker** · 08-20-2011, 03:21 PM

Dunno about different temperature ratings, have never heard of that. Definitely get thermal -- probably don't need severe duty unless you will be working the truck extremely hard. For general all-around use, I'd get a heavy-duty thermal.

1972RedNeck · 08-20-2011, 07:34 PM

Quote:

Originally Posted by Stocker

Dunno about different temperature ratings, have never heard of that.

Me neither. I was just wondering if there was such a thing.

1972RedNeck · 08-20-2011, 07:39 PM

I was just looking at Summit Racing again. They don't have a 7 blade, 18 inch fan. Where should I get one?

1972RedNeck · 08-20-2011, 11:28 PM

Nobody knows?

BMERDOC · 08-20-2011, 11:31 PM

Dare I even ask why you aren't going electric?

Longhorn Man · 08-21-2011, 08:43 AM

mechanical is cheaper, more dependable, generally quieter, and move a crap load of air.

I would locate a fan from a wrecking yard. Don't get the ones with flex blades, GM used some stock for a few years, but they started snapping just like the blue ones from jegs/summit.
I know NAPA's HD clutch will move some seriouse air. When the clutch locks up, there is hardly any slippage, it goes from freewheeling to locked up in an instant. It's enough to bog the motor. I only recomend that one for a seriouse work horse truck.
I think a normal duty, thermostatic clutch is the best deal for normal driving.

oldblue1968chevy · 08-21-2011, 09:56 AM

long or short waterpump? I have a fan for a long water pump setup with a clutch on it. I went to a short water pump to be more original.

Let me know if your interested in buying a used one

http://67-72chevytrucks.com/vboard/s...d.php?t=467844

Its in that thread somewere for sale

bobs409 · 08-22-2011, 06:42 AM

I got one from a 75 Monte Carlo and put it on my 454 project. WOW that thing moves the air! I just bought a new clutch for it from Advance but that $5 dollar fan sure works great!

**Stocker** · 08-22-2011, 11:35 AM

Quote:

Originally Posted by Longhorn Man

I would locate a fan from a wrecking yard.

Yup. Just measure so you'll know it fits.

fwiw, in the 34 years I have owned it, my truck has never overheated with its OEM 7-blade 18" clutch fan.

08-20-2011, 03:21 PM	#2
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,576	Re: Fan Shopping Dunno about different temperature ratings, have never heard of that. Definitely get thermal -- probably don't need severe duty unless you will be working the truck extremely hard. For general all-around use, I'd get a heavy-duty thermal. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

08-20-2011, 11:31 PM	#6
BMERDOC Registered User Join Date: Jun 2011 Location: Richmond,Va Posts: 2,934	Re: Fan Shopping Dare I even ask why you aren't going electric? __________________ Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever!

08-21-2011, 08:43 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Fan Shopping mechanical is cheaper, more dependable, generally quieter, and move a crap load of air. I would locate a fan from a wrecking yard. Don't get the ones with flex blades, GM used some stock for a few years, but they started snapping just like the blue ones from jegs/summit. I know NAPA's HD clutch will move some seriouse air. When the clutch locks up, there is hardly any slippage, it goes from freewheeling to locked up in an instant. It's enough to bog the motor. I only recomend that one for a seriouse work horse truck. I think a normal duty, thermostatic clutch is the best deal for normal driving.

08-21-2011, 09:56 AM	#8
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: Fan Shopping long or short waterpump? I have a fan for a long water pump setup with a clutch on it. I went to a short water pump to be more original. Let me know if your interested in buying a used one http://67-72chevytrucks.com/vboard/s...d.php?t=467844 Its in that thread somewere for sale __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

08-22-2011, 06:42 AM	#9
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	Re: Fan Shopping I got one from a 75 Monte Carlo and put it on my 454 project. WOW that thing moves the air! I just bought a new clutch for it from Advance but that $5 dollar fan sure works great! __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10



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