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Old 05-07-2020, 09:46 AM   #1
Rocket8843
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Default *Derale flexible fans

Just how noisy are the Durale flex fans as compared to the steel bladed fans. I have a 57 with very little room between the radiator and water pump. I manage to get the stock 4-bladed fan on after some modification to it but its noisy. I tried a nylon fan but sounded like I had a siren mounted on the engine
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Old 05-07-2020, 10:06 AM   #2
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If a stock 4 blade fan is too noisy for you I'm pretty sure you will not find any fan mechanical or electric that will be any quieter. Your choice but I wouldn't use a flex fan of any brand for anything other than a lawn ornament. Metal can only bend so many times before it breaks and lookout when it lets a razor blade go flying.
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Old 05-07-2020, 10:17 AM   #3
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Rocket....Totally agree with Bruce....Not sure why your four blade fan doesn't fit...However, I replaced my four blade with this six blade steel fixed blade fan from Derale and had no issues with the fit.

Do you have a fan shroud? If not, you probably need one.

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Old 05-09-2020, 11:02 AM   #4
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I do not have room for a shroud. There is approximately 1" clearance from the water pump hub (short pump) to the radiator. I had to flatten the 4 blade to make it fit.
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Old 05-09-2020, 11:06 AM   #5
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Wow. Was that a Deral flex fan?
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