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Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 11-15-2010   #1 (permalink)
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Default electric pusher fan

hi i have a 1966 mustang with a 289 auto can i run a electric pusher fan with a stock 6 blade flex fan.. if i can what size fan should i use ..car run a little hot 200...at stop light.just want too keep it cool... i will run a switch under dash when i need too use it ....thank you....bob:?:

Last edited by bobs1966; 11-15-2010 at 04:44 PM. Reason: forgot too add a word
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Unread 11-15-2010   #2 (permalink)
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I had a Landcruiser with a 350 Chevy in it, with a high performance flex fan, in the end I realized it was not efficient, so I turfed it and installed a full size puller style electric fan, and I never overheated again. My 2001 Cobra came from the factory with an electric puller fan, I programmed the Diablo tuner for 205* on, 195* off, and even on hot days in traffic, there are no overheating issues. I have purchased the product called Water Wetter which enhances the cooling ability of the antifreeze, but haven't had to use it. Hope this helps.
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Unread 11-15-2010   #3 (permalink)
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Hey Bob I don't understand are you running a after market flex fan now, if so get rid of it and go to the stock fan and if it still heats up add a shroud which you should have anyhow. Flex fans only work when driving hard not suficiant idling or cruising. I've had many flex fans on cars that I've purchased. They have always over heated and I've gone back to original fan with no problem temp comes right down to normal operating range.
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Unread 11-15-2010   #4 (permalink)
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Default electric fan replacement

yes running flex fan...have 4 row rad.all cleand out new t stat anti freeze...but no shroud...were do i get one at????
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Unread 11-15-2010   #5 (permalink)
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A shroud is the way to go. When I got my mustang it did not have a shroud and after I put one on it made a huge difference. The shrouds don't cost much. Check with California Mustangs shop. You can order online.
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Unread 11-15-2010   #6 (permalink)
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Quote:
Originally Posted by bobs1966 View Post
hi i have a 1966 mustang with a 289 auto can i run a electric pusher fan with a stock 6 blade flex fan.. if i can what size fan should i use ..car run a little hot 200...at stop light.just want too keep it cool... i will run a switch under dash when i need too use it ....thank you....bob:?:
You don't mention what temp TS you're running. Also, what ambient temp at 200 degree? You should be running a shroud and the fan blade should be within 1" of the rad and 50% within the shroud.
Happy Motoring!
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Unread 11-16-2010   #7 (permalink)
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Like I said get rid of the flex fan and go back to stock fan I believe you can get 4, 5 or (6) blade if not mistaken, more blades the better I believe 67 - 68 mustang has 5 - 6 blades. By doing this alone you will notice a difference and for the extra bonus get the shroud. Try CJ free shipping always. You dont need the extra fan dont waist the money. These came from the factory this way with no problems as long as you are running a stock motor and even a performance motor its best to run a clutch fan. Just my opinion.
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Unread 11-16-2010   #8 (permalink)
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Which ever supplier you order the shroud from, make sure you tell them you have a 4-core radiator. It takes a different mounting kit.
(Go ahead and ask me how I know that )
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Unread 11-16-2010   #9 (permalink)
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Default Elictric fan pusher

t-stat is a 180 fan is about 3 inches from rad....car never came with shroud...but i will put one on......what do you thinK??
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Unread 11-16-2010   #10 (permalink)
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Quote:
Originally Posted by bobs1966 View Post
t-stat is a 180 fan is about 3 inches from rad....car never came with shroud...but i will put one on......what do you thinK??
As I may have commented, move the fan in to within an 1" of the rad. Add the shroud. optimum efficiency occurs with the fan blades approx. 50% within the shroud.
Happy Motoring!
PS: you will, most likely, need a 2 1/4" fan extension.
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Unread 11-17-2010   #11 (permalink)
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Quote:
Originally Posted by kenash View Post
As I may have commented, move the fan in to within an 1" of the rad. Add the shroud. optimum efficiency occurs with the fan blades approx. 50% within the shroud.
Happy Motoring!
PS: you will, most likely, need a 2 1/4" fan extension.
Here's a pic of what I'm running with great success.
Attached Thumbnails
electric pusher fan-img_1463.jpg  
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Unread 11-17-2010   #12 (permalink)
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Hey Ken nice info pic. You cant do better then that but I do have 1 question do you have any problems with flex fan. I've (always) had problems with them. I will switch over to a stock fan blade or a clutch fan and my temp comes right down.
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Unread 11-17-2010   #13 (permalink)
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Quote:
Originally Posted by sweethotrods View Post
Hey Ken nice info pic. You cant do better then that but I do have 1 question do you have any problems with flex fan. I've (always) had problems with them. I will switch over to a stock fan blade or a clutch fan and my temp comes right down.
Hi,
I have never had an issue with that fan style. It's been through 3 changes, with each being a little more juiced. It feathers as the RPMs rise, thus, reducing parasitic HP loss.
Happy Motoring!
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