Re: Electric fan recommendation. Please help.
[Re: Moparite]
#2955936
08/21/21 11:18 AM
08/21/21 11:18 AM
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Joined: Oct 2015
Posts: 732 Michigan
BlueRacer69
OP
super stock
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OP
super stock
Joined: Oct 2015
Posts: 732
Michigan
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Car still runs warmer then I'd like at slow speeds or at red lights. Is the fan clutch working correctly? Shroud installed? There is no clutch fan. A 69 big block Dart had a 18" fixed fan with 1 1/2" pitch to the blades. I've upgraded to a different 18" fan with a 2" pitch to pull more air throu the radiator. Yes I have a fan shroud on it.
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Re: Electric fan recommendation. Please help.
[Re: TJP]
#2956134
08/21/21 09:29 PM
08/21/21 09:29 PM
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Joined: Jan 2003
Posts: 27,468 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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Troy with a Hemi Dart and Barracuda now runs those 3 row high density cores the OP has. Last one from Glen Ray
He has viscous clutch with OE fan. No shroud cause factory hurst S/S didn’t come with them.
No cooling issues with a 528 Siamese bore and 472 regular bore motors. 90 degree So Cal valley weather here surrounded by mountain ranges on to get out and in.
With the items the OP has done so far, I think there needs to be a look at non cooling system issues:
Ignition Carburation rust and scale in block Physical failure: head gasket, head crack, etc Mechanical: cam lobe flat,
383 cars were often raced and lived hard lives. Do you have any idea the condition of the block?: O-ringed, sleeved, etc. numbers matching?
OE Hemi cars with original/dated motors can have nagging problems like this cause the Hemi parts used to build them are all raced-out. Repaired blocks are typical, large overbores, all kinds of crazy stuff done to them.
Last edited by autoxcuda; 08/21/21 09:32 PM.
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Re: Electric fan recommendation. Please help.
[Re: autoxcuda]
#2956237
08/22/21 11:11 AM
08/22/21 11:11 AM
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Joined: Jan 2003
Posts: 15,383 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,383
Omaha Ne
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3 row high density cores the OP has. Last one from Glen Ray there could be a key there, Did the OP's unit come from Glen Ray or elsewhere. The reason for asking is as previously stated, all cores are not created equally. I know for a fact that Glen Ray uses specific sources and he has helped in resolving more than one over temp BB issues that had NEW 22" cores from other sources.
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Re: Electric fan recommendation. Please help.
[Re: TJP]
#2956343
08/22/21 02:42 PM
08/22/21 02:42 PM
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Joined: Jan 2003
Posts: 27,468 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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3 row high density cores the OP has. Last one from Glen Ray there could be a key there, Did the OP's unit come from Glen Ray or elsewhere. The reason for asking is as previously stated, all cores are not created equally. I know for a fact that Glen Ray uses specific sources and he has helped in resolving more than one over temp BB issues that had NEW 22" cores from other sources. The one from Glen Ray is the Barracuda he got running recently. The radiator in the Hemi Dart has been in there for 9 years. 4 row high density core. It was done by a local shop Reseda Radiator . IIRC around $500 back then. I have an cheap Chinese Champion 22” 4-core in my Barracuda with a stroker 416, 9.7:1 compression, 242@050 solid cam. I made a metal shroud and my MP fan has 1” cut from every blade (dumb champion water neck placement). … I don’t overheat. I bought it because of cost and weight.
Last edited by autoxcuda; 08/23/21 09:26 PM.
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Re: Electric fan recommendation. Please help.
[Re: 70HemiGTX]
#2956757
08/23/21 09:26 PM
08/23/21 09:26 PM
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Joined: Oct 2015
Posts: 732 Michigan
BlueRacer69
OP
super stock
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OP
super stock
Joined: Oct 2015
Posts: 732
Michigan
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I have a "pusher" fan on my 68 Dart. It is a Mr. Gasket 18" I believe. I updated my radiator with a "Champion" aluminum 4 (I think) row. Stock opening in the rad. support. 180 thermostat. Water only with water wetter. 440, 12.5 - 1 pistons. It runs 170 - 190 for me. I usually don't sit in traffic. Alot of the time, I don't even turn the fan on as I'm driving. If I do get in traffic or sitting idling, I flip the switch on and don't worry about it.
Wire it up correctly and you do not have to worry about the original wiring handling the draw of a fan. Use a relay and a hot wire (fused) directly from the battery with a switch or a powered wire from the original harness to the relay activator and you are good to go. The relay activator only draws like 3 amps if I remember correctly. It may be even less. 70HemiGTX, Thank you for that information.
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Re: Electric fan recommendation. Please help.
[Re: 70HemiGTX]
#2956778
08/23/21 10:24 PM
08/23/21 10:24 PM
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Joined: Jan 2003
Posts: 27,468 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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I have a "pusher" fan on my 68 Dart. It is a Mr. Gasket 18" I believe. I updated my radiator with a "Champion" aluminum 4 (I think) row. Stock opening in the rad. support. 180 thermostat. Water only with water wetter. 440, 12.5 - 1 pistons. It runs 170 - 190 for me. I usually don't sit in traffic. Alot of the time, I don't even turn the fan on as I'm driving. If I do get in traffic or sitting idling, I flip the switch on and don't worry about it.
Wire it up correctly and you do not have to worry about the original wiring handling the draw of a fan. Use a relay and a hot wire (fused) directly from the battery with a switch or a powered wire from the original harness to the relay activator and you are good to go. The relay activator only draws like 3 amps if I remember correctly. It may be even less. Do you know only have this pusher fan? Or does is it in addition to a mechanical fan?
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Re: Electric fan recommendation. Please help.
[Re: 70HemiGTX]
#2957005
08/24/21 05:01 PM
08/24/21 05:01 PM
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Joined: Jan 2003
Posts: 6,497 N.E. Ohio
KillerBee
master
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master
Joined: Jan 2003
Posts: 6,497
N.E. Ohio
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The temperature on my wife's 440 Six Pack Challenger would slowly creep up on super hot/humid days in prolong stop and go traffic. Any driving speed over 20mph and the temp would cool down and stay cool.
Had a custom built 4 core 26" Mopar radiator, shroud and FloKooler water pump then swapped to a big Champion aluminum radiator with the same results.
I ended up installing a thin Maradyne low power draw pusher fan in front of the radiator with stock fan still in place. Ran a simple toggle switch wired to a relay powered from the battery.
Don't need/use it much but it's nice to have if needed and the fan works great. Car will sit at idle all day at 185 degree with the fan on.
Eventually I would like to wire in a temp sensor to automatically turn the fan on/off and keep the the toggle as a back up.
Last edited by KillerBee; 08/24/21 05:06 PM.
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