flex fan
Thread Starter
Burning Brakes
Joined: Feb 2005
Posts: 977
Likes: 1
From: wash. dc
flex fan
got a flex fan for my 71BB and also ordered a new fan clutch. in trying to install this mornin there's no way for me to install the fan clutch as the fan won't fit over the clutch. my ?, do i need the fan clutch with this fan.
Drifting
Joined: Oct 2003
Posts: 1,330
Likes: 1
From: Kerrville Texas
No you don't need the fan clutch but you will need a spacer. Make sure that you tell them that the spacer is for a Vette otherwise the center whole will be to small and you will have to ream it out in order to get it to fit.
They come in different lengths by several sizes and then take back the ones you don't use.
Kona
They come in different lengths by several sizes and then take back the ones you don't use.
Kona
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
Originally Posted by kona
No you don't need the fan clutch but you will need a spacer. Make sure that you tell them that the spacer is for a Vette otherwise the center whole will be to small and you will have to ream it out in order to get it to fit.
They come in different lengths by several sizes and then take back the ones you don't use.
Kona
They come in different lengths by several sizes and then take back the ones you don't use.
Kona
I'd space it out until the fan is 1/2 of the way into the shroud. This might mean a spacer of 2 to 3 inches.
Team Owner
Joined: Feb 2005
Posts: 32,519
Likes: 1
From: central America
St. Jude Donor '08-'09
The spacer is just a piece of aluminum with holes in it so that you can run the bolts through into the water pump pulley. You can kind of see it here on my small block. Sorry I don't have a better pick. They are application specific.
trw
trw
Instructor
Joined: Jun 2005
Posts: 248
Likes: 1
From: Apopka Florida
This might be a better pic of a spacer. I had use a pretty long one on mine. 
Also if you noticed I had to cut the shroud at the 12 O'clock postion and pull it back to get it in with the extended spacer.
Also if you noticed I had to cut the shroud at the 12 O'clock postion and pull it back to get it in with the extended spacer.
Last edited by 73'454folendore; Mar 24, 2006 at 04:42 PM. Reason: edit
Thread Starter
Burning Brakes
Joined: Feb 2005
Posts: 977
Likes: 1
From: wash. dc
Originally Posted by 73'454folendore
This might be a better pic of a spacer. I had use a pretty long one on mine. Also if you noticed I had to cut the shroud at the 12 O'clock postion and pull it back to get it in with the extended spacer.
Also if you noticed I had to cut the shroud at the 12 O'clock postion and pull it back to get it in with the extended spacer.
Cruising
Joined: Jan 2006
Posts: 13
Likes: 0
Have 6 blade flex fan (SS) on my 72 SB W/Air. Runs nice and cool as comoared to clutch. However, more fan noise. Sounds like a small supercharger at higher rpm but works great. Also, for best results use a spacer that allows some of the fan to stick out from the fan schroud. (See the pix) above) This allows a little more efficiency of the fan blades at lower RPM.
Instructor
Joined: Jun 2005
Posts: 248
Likes: 1
From: Apopka Florida
Originally Posted by 71redskin
do you find the flex cools better than the original fan and fan clutch setup
Last edited by 73'454folendore; Mar 26, 2006 at 02:17 PM. Reason: additional comments
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