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Re: Clutch fan recommendation needed
[Re: 6PAX]
#3190605
11/13/23 12:53 PM
11/13/23 12:53 PM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
Posts: 75,002
U.S.S.A.
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I'm trying to choose a clutch fan for my 69 Dart and have several options available. Just got the engine in the car so it hasn't been driven yet. My engine is a 400/470 with 10.8 cr, Eddy heads, 727 and 3.73 gears. My radiator is a 3 core 22" factory radiator. I have a 195 degree thermostat installed. I have 3 fans with clutches to choose from. One is a factory 7 blade and clutch from a 67 GTX. The second is a factory 7 blade with aftermarket clutch (not sure of brand) from a 72 340 Duster and the third is the Mopar Performance 5 blade fan/clutch package. Which would you think would provide the best cooling? Have you tried to put any of them in there? The spacer used with a fixed fan is only 5/8" thick on a BB A body , if your engine and radiator are in factory locations there is not a lot of room. I imagine the factory would have put in a clutch fan if there was room ?
running up my post count some more .
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Re: Clutch fan recommendation needed
[Re: 6PAX]
#3190634
11/13/23 03:09 PM
11/13/23 03:09 PM
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Joined: Jan 2003
Posts: 5,439
So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,439
So Cal
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Most clutch fans available today for Mopar are too tall if U have installed bigger radiator... I have a couple of short height(2.75") mopars with the closed WP hub if U require one. Just send me a PM if any further interest... Just my $0.02... 
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Re: Clutch fan recommendation needed
[Re: Sinitro]
#3190644
11/13/23 04:19 PM
11/13/23 04:19 PM
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Joined: Jan 2003
Posts: 5,617
Detroit area
6PAX
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,617
Detroit area
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Most clutch fans available today for Mopar are too tall if U have installed bigger radiator... I have a couple of short height(2.75") mopars with the closed WP hub if U require one. Just send me a PM if any further interest...Just my $0.02... Thanks, I appreciate it. I will recheck everything again to see how far the fan blades go into the shroud as well as how much distance is between the fan blade and radiator fins. The radiator is a 22" 3 core from a 72 Duster or Dart as is the shroud..
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Re: Clutch fan recommendation needed
[Re: 6PAX]
#3190649
11/13/23 04:34 PM
11/13/23 04:34 PM
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Joined: Mar 2009
Posts: 2,461
Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,461
Sydney,Australia
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Hayden do a short HD muscle car fan clutch . Stronger drive (less slip ?) than short Jag unit some use . I use this HD unit with Mopar 5 blade on my Satellite . I do use a manual control smallish electric fan on the front of radiator for the really hot days and heavy traffic .
Tex
New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
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Re: Clutch fan recommendation needed
[Re: tex013]
#3215332
02/22/24 11:49 AM
02/22/24 11:49 AM
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Joined: Jan 2003
Posts: 5,617
Detroit area
6PAX
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,617
Detroit area
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After taking some time away from it, I'm finally working on finishing up my engine cooling. Turns out with the radiator I ended up using that I am going to need a shorter fan clutch. The clutch I have is about 3 5/8" in depth. With it, the seven blade fan I am going to use sits all the way into the shroud to where the back edge of the blades are flush with the shroud opening. So, it looks like I will need a clutch less than three inches in depth to get the fan blade half in and half out of the shroud. Who sells clutches that are less than three inches in depth? Most clutch fans available today for Mopar are too tall if U have installed bigger radiator... I have a couple of short height(2.75") mopars with the closed WP hub if U require one. Just send me a PM if any further interest... Just my $0.02... I tried messaging you Sinitro but was unable to.
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Re: Clutch fan recommendation needed
[Re: tex013]
#3215344
02/22/24 12:24 PM
02/22/24 12:24 PM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,002
U.S.S.A.
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Hayden do a short HD muscle car fan clutch . Stronger drive (less slip ?) than short Jag unit some use . I use this HD unit with Mopar 5 blade on my Satellite . I do use a manual control smallish electric fan on the front of radiator for the really hot days and heavy traffic .
Tex If this is fairly cheap I may have to look into this , The fixed 7 blade I'm stuck with on my dart is a HP robbing POS
running up my post count some more .
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Re: Clutch fan recommendation needed
[Re: JohnRR]
#3215419
02/22/24 04:29 PM
02/22/24 04:29 PM
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Joined: Mar 2009
Posts: 2,461
Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,461
Sydney,Australia
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bought mine @ Rockauto . Priced ok .
Tex
New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
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Re: Clutch fan recommendation needed
[Re: JohnRR]
#3215420
02/22/24 04:35 PM
02/22/24 04:35 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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I use a Hayden Jag clutch with 7 blade fan. I use a 160* T Stat. Engine hardly ever reaches 160*. All fan clutches engage at around 180*. The degree of engagement is different from standard and heavy duty. If I recall, standard duty is about 60% engagement, while heavy duty is around 87% engagement
4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
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Re: Clutch fan recommendation needed
[Re: tex013]
#3215475
02/22/24 08:26 PM
02/22/24 08:26 PM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
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I Win
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bought mine @ Rockauto . Priced ok .
Tex I found it on rock auto , 49 and change but once you add in shipping it gets close to the amazon price of 59 with free shipping , still cheaper than summit at 69.99 plus the ride
running up my post count some more .
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Re: Clutch fan recommendation needed
[Re: 6PAX]
#3215477
02/22/24 08:27 PM
02/22/24 08:27 PM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
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I'm trying to choose a clutch fan for my 69 Dart and have several options available. Just got the engine in the car so it hasn't been driven yet. My engine is a 400/470 with 10.8 cr, Eddy heads, 727 and 3.73 gears. My radiator is a 3 core 22" factory radiator. I have a 195 degree thermostat installed. I have 3 fans with clutches to choose from. One is a factory 7 blade and clutch from a 67 GTX. The second is a factory 7 blade with aftermarket clutch (not sure of brand) from a 72 340 Duster and the third is the Mopar Performance 5 blade fan/clutch package. Which would you think would provide the best cooling? How much space do you have between the pulley face and the radiator , my car is apart so I can't measure it .
Last edited by JohnRR; 02/23/24 10:03 AM.
running up my post count some more .
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Re: Clutch fan recommendation needed
[Re: 68LAR]
#3215478
02/22/24 08:28 PM
02/22/24 08:28 PM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
Posts: 75,002
U.S.S.A.
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I use a Hayden Jag clutch with 7 blade fan. I use a 160* T Stat. Engine hardly ever reaches 160*. All fan clutches engage at around 180*. The degree of engagement is different from standard and heavy duty. If I recall, standard duty is about 60% engagement, while heavy duty is around 87% engagement What application is the Jag clutch for ?
running up my post count some more .
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Re: Clutch fan recommendation needed
[Re: JohnRR]
#3215498
02/22/24 09:25 PM
02/22/24 09:25 PM
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Joined: Jan 2003
Posts: 5,617
Detroit area
6PAX
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,617
Detroit area
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How much space do you have between the pullet face and the radiator , my car is apart so I can't measure it . 4 1/8"
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Re: Clutch fan recommendation needed
[Re: 6PAX]
#3215554
02/23/24 10:05 AM
02/23/24 10:05 AM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,002
U.S.S.A.
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How much space do you have between the pullet face and the radiator , my car is apart so I can't measure it . 4 1/8" Thanks , that hayden one should fit , I wonder if putting a thin spacer between it and the fan blade to move the blade back some , if it needs it , would cause a problem ?
running up my post count some more .
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Re: Clutch fan recommendation needed
[Re: Jeff_383]
#3215555
02/23/24 10:05 AM
02/23/24 10:05 AM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,002
U.S.S.A.
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Thanks , rockauto here I come
running up my post count some more .
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Re: Clutch fan recommendation needed
[Re: 6PAX]
#3215608
02/23/24 01:14 PM
02/23/24 01:14 PM
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Joined: Jan 2003
Posts: 75,002
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,002
U.S.S.A.
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I see that is the Hayden 2765 unit. I was reading a thread over on FABO where the Hayden 2947 unit was recommended. Does anyone have any experience as to which one is the better choice? They look pretty similar but the 2947 has a little large mount diameter. Good question , according to the specs on rockauto , the 2765 is about .050 shorter than the 2947 .
running up my post count some more .
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