Author Topic: Electric fans  (Read 1380 times)

Rattiac

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Electric fans
« on: July 16, 2017, 06:14:13 PM »
What size electric fans are you guy's running ?

It's time my car gets an auxiliary electric fan to help out the mechanical unit.

I think I can put a 10- 12" fan in front of my radiator. It would have to be low profile but it should fit.
Also what cfm are yours ?

This will be a winter project.

themoose

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Re: Electric fans
« Reply #1 on: July 16, 2017, 06:45:15 PM »
I'm using a Spal 12 inch 1328 CFM puller with no mechanical unit because of space limitations. It's a bit noisy but it keeps things cool. You can barely see it in the engine shot below

Too soon we get old too late we get smart. One out of two aint bad 8)

ChevRon

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Re: Electric fans
« Reply #2 on: July 16, 2017, 07:48:59 PM »
  Cooling Components is what I use. Very reliable and much quieter than others. Have installed many of these after trying everything else on the market. Ron

62131

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Re: Electric fans
« Reply #3 on: July 16, 2017, 09:46:37 PM »
I'm running Spal 16" fans on both the 38 and the 32.

Senior31

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Re: Electric fans
« Reply #4 on: July 17, 2017, 12:14:46 PM »
Cooling Components is the only fan I would recommend.  Just like ChevRon I have used many of them and have never been disappointed.

EDNY

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Re: Electric fans
« Reply #5 on: July 17, 2017, 04:28:01 PM »
On my son's 37 Chevy with LT1 we installed a Derale 18217 a 17" pusher, two speed.  On my 33 Chevy I used a Ford Taurus two speed puller - supposed to be one of the most efficient factory fans.
33 Chevy 5 Window, 34 Chevy 3 Window, 37 Chevy 4dr sedan

Rattiac

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Re: Electric fans
« Reply #6 on: May 27, 2018, 09:25:38 PM »
After some careful measurements. I ordered a Spal 11" pusher fan 808cfm and also some new steel trans cooler lines.
It was a toss up between a 10 and 12" fan. So I compromised.

I also need to re mount my radiator.
How do you guys mount yours (solid OR float)?

I 've heard of some cracking their radiators. Not sure how that happens. Any help would be great.

Rattiac

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Re: Electric fans
« Reply #7 on: May 28, 2018, 02:15:11 PM »
Found this little bit of cool info. Gives measurements on most electric fan's.

http://www.absoluteradiator.com/FanStore.asp


.

62131

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Re: Electric fans
« Reply #8 on: May 28, 2018, 09:24:31 PM »
After some careful measurements. I ordered a Spal 11" pusher fan 808cfm and also some new steel trans cooler lines.
It was a toss up between a 10 and 12" fan. So I compromised.

I also need to re mount my radiator.
How do you guys mount yours (solid OR float)?

I 've heard of some cracking their radiators. Not sure how that happens. Any help would be great.

I made two u shaped mounts for the bottom and one for each side and used rubber to cradle my radiator
« Last Edit: May 29, 2018, 07:55:40 PM by 62131 »

madmike3434

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Re: Electric fans
« Reply #9 on: May 29, 2018, 02:24:08 AM »
What size electric fans are you guy's running ?

It's time my car gets an auxiliary electric fan to help out the mechanical unit.

I think I can put a 10- 12" fan in front of my radiator. It would have to be low profile but it should fit.
Also what cfm are yours ?

This will be a winter project.

Why would you need an electric fan in front of the radiator if you have a steel 6 blade fan from Derale that has a big pitch to the blades.  These fans do not flex and draw a lot of air thru the radiator.  They come in 13" to 18".   These are not the throw in trash can flex racing fans that do not work for street rods.   These are priced below $50

 The test for your existing fan is can it hold a cloth diaper size 24 x 24 cloth in front of the radiator grill running at idle ? 650--700 rpm.  If the answer is no, trash it.

mike lynch

Rattiac

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Re: Electric fans
« Reply #10 on: May 29, 2018, 02:13:43 PM »
Just needed to have some help in stop and go traffic. That's where it heats up.

madmike3434

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Re: Electric fans
« Reply #11 on: May 29, 2018, 06:59:23 PM »
take the test as described above.

 Fire car up and let idle 650--750 rpm, place 2ft  x 2ft cloth diaper or pillow case and place it in front of grill starting at one foot away and slowly move towards grill/radiator.  If the air grabs it and sucks it to the grill and holds it there, you got a fan that works especially in stop and go traffic.

If not your fan doesn't draw well enough then you found the problem.  If you have stamped louvers in the top of your hood, the Derale fan 6 blade will straighten your cloth out and it will flap like a flag.

For our 33--35 chevys we need a radiator that's 2--2 1/2"  thick core.

If your SBC is slung low in the frame and only half of the fan or less is covering the radiator this can also cause a problem.  This is why somebody developed the SBC water pump riser casting, my motor is high enough at 12" to the cross member measured at the center of the water pump .

Since a guy gave me a Chrysler steel fan 16" used in dodge dart with 383 NON clutch back in the late 70's and I filed the holes to slots, have never had a problem with overheating since.

I drilled the 4 fan mounting bolts allen head , drilled the head and safety wired the bolts.  If your running a corvette water pump with the 3/4" heavy duty snout, fan mounting hole will have to be opened up .

mike lynch
« Last Edit: May 29, 2018, 07:09:42 PM by madmike3434 »

chopper526

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Re: Electric fans
« Reply #12 on: May 30, 2018, 09:05:22 AM »
Not sure where your engine sits Rattiac, but like madmike said, my 350 sits a little low in the frame. So, I used the zip riser to raise the water pump/fan. I am using a 17" steel fan and a semi-circular fan shroud. I have never gone above 180. That being said, I also have an open engine compartment, and for what it's worth, added "wetter water"........just like to cover all the bases. ;D
Tighten it up til it strips, then back it off a quarter turn

Rattiac

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Re: Electric fans
« Reply #13 on: May 31, 2018, 03:01:25 PM »
I'll give that test a shot this weekend, once I unburry the car from the back wall of the shop. :o

EDNY

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Re: Electric fans
« Reply #14 on: June 02, 2018, 07:33:45 AM »
Wish I could find that article again but it discussed fan blade placement in a shroud. Standing at the side of the car the "factory" wide blades stick half way out and the other half remains inside the shroud. You'll notice that when the car is running the hot air is pushed sideways to where you are standing!  To far back or forward the hot air is pushed toward the engine.
33 Chevy 5 Window, 34 Chevy 3 Window, 37 Chevy 4dr sedan

 


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