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Old 08-23-2005, 06:20 PM
1982 SS's Avatar
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Need electric fan install pics!

Okay, I have read several posts regarding electric fans. I also had a hard time finding any electric fan installs. Let's see some pictures! I have a few in my project journal, I'm sure there are more here... somewhere. Let's see the good installed pictures to help out those in need of direction and those of us who want to make our fans better!

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Old 08-25-2005, 12:44 AM
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Not sure what you are asking. Electric fan installation is one of the easiest tasks in rodding.

Simply shove the plastic mounting rods through the fan mounting lugs, slide the long pins on the mounting rods through the radiator core (be sure the sponge rubber pads are there) and slide on the one-way lock washers, again w/ sponge pads until the fan is snug. Be sure the pitch of the fan and direction of rotation passes air through the core depending on whether the fan is a pusher or puller.

Attach a fused 10ga wire from the "run" terminal on your ignition switch to one side of a N/O relay. Bosch headlight relay works great. The other power terminal of the relay goes to your fan w/ 10ga wire. Ground the other fan lead to the frame. On the control side of the relay attach a 14ga "run" hot lead to one terminal. Alternatively, you can use a cheaper Bosch horn relay and eliminate the need for the 14ga hot lead. Run another 14ga lead from the other terminal to a thermostatic switch that goes to ground when the water temp hits 200F. I like to put on two of these thermostatic switches - one in the bottom radiator tank as a final protection since this is the water going to the engine and will always be covered with water if the level gets really low in the engine - and a primary one in the head or thermostat area which will get hot first. You can also splice a wire to a manual grounding toggle switch so you can turn the fan on whenever the engine is running, regardless of water temperature. By wiring the switches all as grounding devices, you can put on as many or few as you like and any one of them will turn the fan on. I like to wire them into the "run" circuit instead of the "hot" circuit. The former only runs the fans when the engine is running and turns them off when cranking the engine. The latter draws a lot of current when the battery is not being charged and runs them when you are trying to crank a hot engine which really stresses the battery.

Last edited by willys36@aol.com; 08-25-2005 at 07:51 AM.
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Old 08-25-2005, 07:07 PM
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Looking for pictures of nice looking installs mounted to a nice shroud. I was interested to see how others had done the fan and shroud. Like this...

that one happens to be in my journal, but I am interested in different ideas. FWIW, I don't dig sticking something through my radiator, it's dead weight on a small piece of brass or aluminum held by a plastic stalk.
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Old 08-26-2005, 11:27 AM
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I didn't like the idea of the plastic thru the radiator either but it does work. I've had one on my Olds as a pusher for when I get stuck in traffic. I use it for supplemental cooling and have had no problems with it.
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Old 08-26-2005, 02:56 PM
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I can understand the small ones throught the radiator, but I am still interested to see how others have done aftermarket fans and fans from junkyard cars. I just read all these things about them and wonder if people take pictures of them. I am just curious how others have done it.
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Old 08-27-2005, 11:53 PM
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Looks like no one has pictures of their electric fan installs or nobody has a good enough looking one to bother with taking a picture of.
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Old 11-15-2005, 11:01 PM
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This thread has been idle for a while and I hope this isn't high jacking your thread. Willys, How are the thermostatic switches mounted to the bottom tank? I considering going with an electric fan with the adjustable 180 - 210 degree thermostat. I just bought a new aluminum US radiator for my Suburban, but I think the mechanical fan sits too low at the radiator. Here's a link to my journal with pictures.
http://www.hotrodders.com/forum/jour...ournalid=25573
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Old 11-16-2005, 07:31 PM
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I drill a 1/4" hole in the tank then using a large diameter tapered punch I tap it into the hole until it is big enough to accept the OD of a 1/2 half inch pipe collar. By opening the hole this way, it creates a large flange in the hole for plenty of soldering surface and no worries of the solder joint failing as it might if the hole were simply drilled into the thin sheet metal. I solder the collar into the hole and screw in my sensor.
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Old 11-16-2005, 07:41 PM
Frmly sc*ot.
 
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Push or pull

Does anyone know for sure if there is a difference in performance of a pusher fan vs a puller fan?
Thanks.
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Old 11-16-2005, 09:55 PM
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Thanks for the help Willys.

scrot,
I did a google and a pusher fan is less effective than a puller. Do a google based on your configuration and you'll get the % of loss.
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Old 11-17-2005, 12:13 AM
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pushers 'cut' a round column of air directly in front of the blades. Pullers, especially ones using a shroud, create a low pressure region behind most if not all the radiator area, thus air flows over a much larger number of cooling fins and heat transfer efficiency increases accordingly.
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Old 11-17-2005, 03:47 PM
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Thanks for the info, Sly and Willy.
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Old 11-17-2005, 09:48 PM
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Quote:
Originally Posted by 1982 SS
Looks like no one has pictures of their electric fan installs or nobody has a good enough looking one to bother with taking a picture of.
http://lxsteed.stangnet.com/photo4.html
http://members.tccoa.com/392bird/markviii.htm
http://www.dccontrol.com/
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