5 blade vs. 7 blade clutch fan
#1452747
06/14/13 02:12 AM
06/14/13 02:12 AM
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Joined: Jan 2003
Posts: 1,307
BC, Canada
Black_Bee
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,307
BC, Canada
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Hey guys!
I've got a 5 blade clutch fan on my Super Bee's 383 and am wondering if swapping to a 7 blade would help cool better.
I have a 3 core aluminum rad and no shroud, and haven't had any cooling issues yet, but haven't really driven the car in really hot weather so I'm not positive that it will stay cool in traffic.
I have the 7 blade sitting on the shelf, so doesn't cost me anything to swap, but don't want to just do it and find out that the 7 blade fans actually cool worse for some reason.
Thanks!
Paul
'69 Super Bee 383 EFI Turbo
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Re: 5 blade vs. 7 blade clutch fan
[Re: Black_Bee]
#1452749
06/14/13 02:56 AM
06/14/13 02:56 AM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Let's put it another way so as to avoid the usual Moparts banter,...Superbirds when new, where originaly equipped with only 7 blade clutch fans, after the first run of units fell into customers hands, and overheating complaints started coming in, recalls, TSB's, and what cars that were still in production, were retrofitted with fixed 5 blade fans to solve overheating conditions... 
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Re: 5 blade vs. 7 blade clutch fan
[Re: DAYCLONA]
#1452750
06/14/13 08:44 AM
06/14/13 08:44 AM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
Let's put it another way so as to avoid the usual Moparts banter,...Superbirds when new, where originaly equipped with only 7 blade clutch fans, after the first run of units fell into customers hands, and overheating complaints started coming in, recalls, TSB's, and what cars that were still in production, were retrofitted with fixed 5 blade fans to solve overheating conditions...
Mike,you're two blades short !!  
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Re: 5 blade vs. 7 blade clutch fan
[Re: 62maxwgn]
#1452752
06/14/13 10:46 AM
06/14/13 10:46 AM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Quote:
Quote:
Let's put it another way so as to avoid the usual Moparts banter,...Superbirds when new, where originaly equipped with only 7 blade clutch fans, after the first run of units fell into customers hands, and overheating complaints started coming in, recalls, TSB's, and what cars that were still in production, were retrofitted with fixed 5 blade fans to solve overheating conditions...
Mike,you're two blades short !!
Ahhh..Most people usually tell me I'm "two oars short" ....fixed is better than clutch anyday of the week
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Re: 5 blade vs. 7 blade clutch fan
[Re: DAYCLONA]
#1452753
06/14/13 11:38 AM
06/14/13 11:38 AM
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Joined: Jan 2003
Posts: 1,307
BC, Canada
Black_Bee
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,307
BC, Canada
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Quote:
Let's put it another way so as to avoid the usual Moparts banter,...Superbirds when new, where originaly equipped with only 7 blade clutch fans, after the first run of units fell into customers hands, and overheating complaints started coming in, recalls, TSB's, and what cars that were still in production, were retrofitted with fixed 5 blade fans to solve overheating conditions...
Thanks for the info!
So 5 blade fixed fan is better than 7 blade clutch... Is 7 blade clutch better than 5 blade clutch? Those 2 clutch fans are my options.
Thanks!
Paul
'69 Super Bee 383 EFI Turbo
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Re: 5 blade vs. 7 blade clutch fan
[Re: dogdays]
#1452755
06/14/13 02:07 PM
06/14/13 02:07 PM
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Joined: Jan 2003
Posts: 1,307
BC, Canada
Black_Bee
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,307
BC, Canada
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Quote:
First of all you don't know if or that you have a problem, so this is all fog.
But, know for certain that any fan will work better with a shroud. So that's where I would start.
After you locate and install a shroud, drive in hot weather and note the results, THEN it may be necessary to ask about fan blades. But until then, it is all useless.
R.
I'm just trying to maximize cooling with what I already have. I have a 7-blade fan to try, and don't have a shroud to try.
I have been looking for a shroud, but the reproductions or OEM ones are a lot of money, and I have bought several non-stock shrouds from the junk yard that either don't fit, or don't look good installed.
Thanks for the help!
Paul
'69 Super Bee 383 EFI Turbo
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Re: 5 blade vs. 7 blade clutch fan
[Re: babarracuda]
#1452756
06/14/13 02:20 PM
06/14/13 02:20 PM
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Joined: Jan 2003
Posts: 21,074
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,074
Niles , Ohio
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No fan will work right without a shroud?I guess you better go look at most of the Mopars built.Probally over 1/2 or better never had a shroud.My kids OE setup 62 300 413 no shroud.It works better than the hi buck setups that most use.My 65 B body ran for years since I bought it in 69 with no shroud on a BB.Still runs a stock rad but has a shroud as it came with the junk year rad I bought.Neither ever ran over 190 even when I didnt have a shroud.Rocky
Chrysler Firepower
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Re: 5 blade vs. 7 blade clutch fan
[Re: therocks]
#1452757
06/14/13 02:36 PM
06/14/13 02:36 PM
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Joined: Dec 2003
Posts: 22,696
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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So as a vehicle increases speed, a fan begins to really add little to move air thru the radiator. I suspect also a shroud is most effective at a standstill. So when and under what conditions does op have a cooling issue? When we know that we can improve our suggestions
And a superbird has a rather restricted rad opening intentionally, and the car was not originally intended for sitting in traffic.
Last edited by jcc; 06/14/13 02:41 PM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: 5 blade vs. 7 blade clutch fan
[Re: jcc]
#1452758
06/14/13 02:47 PM
06/14/13 02:47 PM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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Quote:
And a superbird has a rather restricted rad opening intentionally, and the car was not originally intended for sitting in traffic.
Bullseye...
OEM A/C cooling configuration seems to work just fine on millions of cars produced...
I've been in bumper to bumper in 95+ degree temps...
I've also ran 90 M.P.H. plus for an 'extended' period of time...
After 20 years, and all different temp extremes, I've NEVER gone beyond 180...
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Re: 5 blade vs. 7 blade clutch fan
[Re: RSNOMO]
#1452759
06/14/13 03:23 PM
06/14/13 03:23 PM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
Quote:
And a superbird has a rather restricted rad opening intentionally, and the car was not originally intended for sitting in traffic.
Bullseye...
OEM A/C cooling configuration seems to work just fine on millions of cars produced...
I've been in bumper to bumper in 95+ degree temps...
I've also ran 90 M.P.H. plus for an 'extended' period of time...
After 20 years, and all different temp extremes, I've NEVER gone beyond 180...
Never past 195* here and I have one of those little openings !
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Re: 5 blade vs. 7 blade clutch fan
[Re: Black_Bee]
#1452760
06/14/13 03:57 PM
06/14/13 03:57 PM
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Joined: Oct 2003
Posts: 4,013
South Park, Pa.
68LAR
master
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master
Joined: Oct 2003
Posts: 4,013
South Park, Pa.
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Quote:
I'm just trying to maximize cooling with what I already have.
After reading most of these posts, it seems you don't know yet what you need.
Here is something to think about.
In traffic, if the car over heats, you need more air movement. (fan/shroud)
At highway speed, if the car overheats, you need more radiator to cool the water.
Fixed fan works best for street cars. Good cooling, but big horsepower drag.
Flex fans work good for street cars also with a little track time. Works better with shroud. Good cooling with less horsepower drag.
Clutch fans with shroud work good for street/strip cars. Good cooling and very little horsepower drag.
With regard to fan blades. A 7 blade will pull more air than a 5 blade.  
4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
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Re: 5 blade vs. 7 blade clutch fan
[Re: Black_Bee]
#1452761
06/14/13 04:19 PM
06/14/13 04:19 PM
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Joined: Mar 2005
Posts: 2,060
Pendleton NY
terzmo
top fuel
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top fuel
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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Quote:
Quote:
Let's put it another way so as to avoid the usual Moparts banter,...Superbirds when new, where originaly equipped with only 7 blade clutch fans, after the first run of units fell into customers hands, and overheating complaints started coming in, recalls, TSB's, and what cars that were still in production, were retrofitted with fixed 5 blade fans to solve overheating conditions...
Thanks for the info!
So 5 blade fixed fan is better than 7 blade clutch... Is 7 blade clutch better than 5 blade clutch? Those 2 clutch fans are my options.
Thanks!
Had heating issues and a 7 blade,whether on a clutch or not, with a shroud will cool excellent. As of now I have a 6 blade/3 row alum/shroud/160 stat and it runs at 158 down the road in 70 degree weather....165 in traffic...may go to a higher stat but want to see how this works in 80 degree + weather.
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