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Old Apr 11, 2018 | 06:43 PM
  #1  
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Hello,
Does anyone know if I would have clearance issues by using a long water pump on my 1977 Vette? I would be replacing the clutch fan and replacing it with a non-clutch flex fan. I have the serpentine pulleys for my accessories but didn’t want to risk it if it won’t fit. The body is currently off of the frame and will be put back on in a couple weeks. Any help is greatly appreciated!
thanks in advance!
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Old Apr 11, 2018 | 07:15 PM
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I can't help you with the water pump question, but you need to watch engine masters
episode 20 on their engine fan comparison, it may change your mind about using a flex fan.

Mark
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Old Apr 11, 2018 | 07:53 PM
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every other Chevy car at the time used a long pump. do you think if it would fit GM would have used it to save money. keep the short pump.
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Old Apr 11, 2018 | 08:08 PM
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I think the long pump would put the fan to far forward into the shroud and not cool as well.

If you were going with electric fans, that's another story.
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Old Apr 12, 2018 | 07:00 AM
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Are you getting the hint; 'drop the flex fan idea'. Welcome to the C3 forum. Electric fans are a good idea and a long pump can be used then. But to answer your original question, the long w/p and a flex fan is pretty close in length as compared to a clutch fan and short pump. Clearance is always an issue with corvettes, but there is a specific distance that the fan needs to be inside fan schroud, and so much left out for proper cooling. T
PS: flex fans make your running engine sound like a turbine.
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Old Apr 12, 2018 | 07:52 AM
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wrong pump, short pump on Corvette.
long pump will create several issues.
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Old Apr 12, 2018 | 08:02 PM
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Thanks everyone for the replies! I was looking at a C3 today and it definitely looks like clearance will not be an issue. However, maybe I will no go the flex fan route and use a non flex.

Joe
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Old Apr 12, 2018 | 08:17 PM
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Originally Posted by Joe C3
Thanks everyone for the replies! I was looking at a C3 today and it definitely looks like clearance will not be an issue. However, maybe I will no go the flex fan route and use a non flex.

Joe
either use clutch blade fan or electric fans. and take a lesson from car manufactures. that is all they use. never have they used flex fans

Last edited by Nowhere Man; Apr 12, 2018 at 08:17 PM.
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Old Apr 12, 2018 | 08:28 PM
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​​​​​​​




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Old Apr 12, 2018 | 08:29 PM
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Default Here are some pics






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Old Apr 12, 2018 | 09:02 PM
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Car is looking good. That's a pretty blue. Nice job!
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Old Apr 12, 2018 | 09:06 PM
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Originally Posted by John 65
Car is looking good. That's a pretty blue. Nice job!
thanks John! The body is off and ready to go back on. It had a bad frame so I got another one and built it this winter. May 1st the body will go back on! I can’t wait!
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