Re: Big block clutch fan
[Re: CR8CRSHR]
#1265165
07/11/12 08:27 PM
07/11/12 08:27 PM
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Joined: Jan 2003
Posts: 28,096 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,096
Irving, TX
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Do not rely on a pusher fan for primary cooling. They are not efficient. Have you ever tried to push a string? It's rather similar to pushing air through a restriction.
Pulling it is far more effective.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Big block clutch fan
[Re: lilmoose102]
#1265166
07/11/12 11:17 PM
07/11/12 11:17 PM
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Joined: Jan 2003
Posts: 5,467 So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,467
So Cal
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Quote:
I have a 70 roadrunner,440,4 speed,22 inch radiator,with a shroud.I want to put a clutch fan on it,bought one from Mancini Racing at Carlisle,and it doesn"t fit.I looked up a mopar performance one at a local dealer and the measurements only allow a 1/4 of an inch between the fan clutch and radiator,not enough in my opinion.Any body else encounter this problem or have any suggestions? thanks.
I have almost the same setup in my 70 RR. 383, 4 speed, 3 core 22", shroud.. You have to use a short clutch fan either the Hayden Jag one or the Mopar TRW OE FC28, the clutch fan can only be a max of about 2.75" in height. This puts the fan 50% into the shroud and about 1" from the fan to the radiator, enough clearance to change the fan belt.
I prefer the FC28 over the Hayden as it has a closed mounting hub compared to the universal slots of the Hayden. For cooling my stroked 383 runs about 175 degrees in SoCal traffic on a hot day. I found my FC28 @ a garage sale for $30 still in a box but they are harder to find.
I hope that helps..
Just my $0.02..
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Re: Big block clutch fan
[Re: CR8CRSHR]
#1265169
07/12/12 02:54 PM
07/12/12 02:54 PM
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Joined: Feb 2003
Posts: 10,304 Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 10,304
Someplace you aren't
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Quote:
I have been watching this post now for the past couple of days and have yet to have anyone who has responded here to validate if, "1/4 of an inch separation" between the clutch fan and the radiator core is an acceptable distance. I am having a similar situation with my build...383 non A/C with an aftermarket aluminum Champion/American radiator. I am using the Jaguar clutch from Napa as it has the shortest shaft length of any out there, a 7 blade MoPar fan, without a fan shroud at present. It would be nice if someone here could validate that that distance will work properly. A simple yes or no would suffice without all the additional rhetoric. Please try to stay on point...
So if he has the Jag clutch already, what would be a shorter one?
Time for an electric fan only?
Torque strap the engine and hope for the best?
Just hope for the best?
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Re: Big block clutch fan
[Re: SomeCarGuy]
#1265171
07/12/12 03:56 PM
07/12/12 03:56 PM
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Joined: Aug 2003
Posts: 8,716 Baltimore/Denver
64Post
master
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master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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Quote:
Quote:
I have been watching this post now for the past couple of days and have yet to have anyone who has responded here to validate if, "1/4 of an inch separation" between the clutch fan and the radiator core is an acceptable distance. I am having a similar situation with my build...383 non A/C with an aftermarket aluminum Champion/American radiator. I am using the Jaguar clutch from Napa as it has the shortest shaft length of any out there, a 7 blade MoPar fan, without a fan shroud at present. It would be nice if someone here could validate that that distance will work properly. A simple yes or no would suffice without all the additional rhetoric. Please try to stay on point...
So if he has the Jag clutch already, what would be a shorter one?
Time for an electric fan only?
Torque strap the engine and hope for the best?
Just hope for the best?
As I mentioned above, another possibility is to heat the saddles and move the radiator core forward so it is even with the core support. There is usually .50"-.75" of additional room to be found here. I had the shop do this with my 3 core stock-type radiator.
Early B's are a notoriously tight fit for a clutch fan. I'm using the stock, early K member, repositioned 3 core rad w/shroud, Hayden clutch and torque strap. I have at least .75" clearance between the rad and clutch. I see no reason why this type of set up wouldn't give even more room in a later application.
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Re: Big block clutch fan
[Re: CR8CRSHR]
#1265176
07/14/12 05:32 PM
07/14/12 05:32 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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I did the jaguar clutch on a Mopar fan for my '63 Dodge 330 with 440 install.
Even with the shorter shaft, I still had to have the brackets moved 1/2" on the sides of my radiator by the local radiator shop. I had him fix it for me and boil it out a few days earlier so he moved the brackets for next to nothing $.
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