Re: Flex fan question
[Re: 6PAX]
#3215136
02/21/24 01:45 PM
02/21/24 01:45 PM
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Joined: Dec 2021
Posts: 1,146 Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,146
Loudoun County, VA
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Not sure how well they cool (I use the MP clutch fan kit), but they're not good for performance: https://allcarvideos.net/2017/05/01/cooling-fan-shoot-out-engine-masters-ep-20-2/
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Flex fan question
[Re: moparx]
#3215143
02/21/24 02:17 PM
02/21/24 02:17 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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those things make a ton of noise if nothing else. look real close at where the blades meet the fan center. i have seen the blades crack there, and you DON'T want to be hovering around the engine running when a blade decides to part company ! i installed one on my 345 International truck. I had the van body off chassis only and I was driving to Miami on I-95 in beautiful weather, dry as a bone at around 2:00pm. Oddly I noticed in my mirrors my rear tires were shiny like they were wet. That made no sense, so I promptly made a side of the road safety stop. A SS flex blade had broken and severed the rad hose, losing all the coolant. Lucky the engine never got hot, and I wasn't standing by looking at the engine running while parked when the blade failed. Not sure whatever benefit they might have, they are NOT worth the risks. If your neck was struck, it would be lights out forever.
Last edited by jcc; 02/21/24 03:14 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: Flex fan question
[Re: Dabee]
#3215151
02/21/24 02:54 PM
02/21/24 02:54 PM
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Joined: Jan 2003
Posts: 21,080 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: 21,080
Niles , Ohio
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Man you must buy junk ones.Have ran one on my old Jeep for years.The one on my 440 now has been on at least 25 years Kid runs one on his built 360 also.they never overheat and as far as noise none.Had lots more trouble with clutch fans than these.Seems most times overheating problems are clutch fans.
Chrysler Firepower
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Re: Flex fan question
[Re: therocks]
#3215165
02/21/24 03:25 PM
02/21/24 03:25 PM
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Joined: Jan 2004
Posts: 4,576 Motor City
6PKRTSE
master
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master
Joined: Jan 2004
Posts: 4,576
Motor City
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They flex great with RPM until they don't. It flexed apart right through the hood of one of my buddies 87 Monte Carlo S.S.with a built small block Chevy.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Flex fan question
[Re: therocks]
#3215179
02/21/24 04:27 PM
02/21/24 04:27 PM
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Joined: Nov 2003
Posts: 3,453 Dandridge TN
Dabee
master
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master
Joined: Nov 2003
Posts: 3,453
Dandridge TN
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Man you must buy junk ones.Have ran one on my old Jeep for years.The one on my 440 now has been on at least 25 years Kid runs one on his built 360 also.they never overheat and as far as noise none.Had lots more trouble with clutch fans than these.Seems most times overheating problems are clutch fans. Have never bought one. Just a observation from what I have seen over the years.
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Re: Flex fan question
[Re: Dabee]
#3215200
02/21/24 06:22 PM
02/21/24 06:22 PM
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Joined: Aug 2007
Posts: 1,513 AZ
Mike P
pro stock
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pro stock
Joined: Aug 2007
Posts: 1,513
AZ
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Fans like the one pictured do not cool near as well as a clutch fan (especially if you’re using a HD clutch). I have built cars where there is not enough room to run a clutch fan. In those instances, I’ll find a factory flex fan. I can usually source then from a Ford who seemed to use them on a lot of 70s passenger cars. The blades have a lot more pitch than the aftermarket units (better low speed cooling). So far I’ve never had one come apart…..which I can’t say about aftermarket units. Personally the fan pictured would end up in the swap meet pile. Just my
Last edited by Mike P; 02/21/24 06:26 PM.
1957 Plymouth (Hemi, Dual Quads, A833 4 Speed 9 1/4 w 4.10) Sold 1937 Dodge Pickup (Hemi, 6X2 intake, 46RH, Dana 60 w 4.56) Sold 1968 Plymouth Valiant 2dr sedan (354 HEMI, 46RH w/4.30 gears) under construction
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