Cluch Fan
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Senior User
Joined: Nov 2004
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From: Wilton, Ca
Cluch Fan
I have a 77 F250 with a 351M and a 4speed tran. After a valve job it is runing warmer not hot,But warmer.I was thinking of changing to a cluch fan instead of the stright one that is on it.
Can someone explain the pro and cons of this,And is this a bad decision
Thanks Don
Can someone explain the pro and cons of this,And is this a bad decision
Thanks Don
New User
Joined: Jan 2008
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Likes: 24
as long as you have one that works it is fine.
If they work properly they work very well.
If they lose fluid they will no longer "feather" and become a viscious fan and chew up HP
Ford makes a 5 blade & 7 blade fan for use with a fan clutch.
The clutches come with 2 different size nose flange holes
If they work properly they work very well.
If they lose fluid they will no longer "feather" and become a viscious fan and chew up HP
Ford makes a 5 blade & 7 blade fan for use with a fan clutch.
The clutches come with 2 different size nose flange holes
Postmaster
Joined: Aug 2005
Posts: 2,760
Likes: 8
From: Gadsden Purchase
Originally Posted by RDON
I have a 77 F250 with a 351M and a 4speed tran. After a valve job it is runing warmer not hot,But warmer.I was thinking of changing to a cluch fan instead of the stright one that is on it.
Can someone explain the pro and cons of this,And is this a bad decision
Thanks Don
Can someone explain the pro and cons of this,And is this a bad decision
Thanks Don
Clutch fans are for quieter operation and better gas mileage and not-towards more cooling.
I got that messed up guys, gals
?Alvin in AZ
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Joined: Dec 2001
Posts: 22,436
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From: Louisville,Ky.
A clutch fan will cool better in most cases. I installed one on the 460 that I put in my 77 and it has never run hot. The blades usually have a more aggressive pitch and pull more air at low speeds, then loosen up at higher speeds to free up power and mileage.
A good 7 blade clutch fan with a thermostatic clutch will cool great.
A good 7 blade clutch fan with a thermostatic clutch will cool great.
Postmaster
Joined: Aug 2005
Posts: 2,760
Likes: 8
From: Gadsden Purchase
Originally Posted by LxMan1
A clutch fan will cool better in most cases. The blades usually have a more aggressive pitch and pull more air at low speeds, then loosen up at higher speeds to free up power and mileage.
Alvin in AZ
