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  #1  
Old 02-24-2009, 04:11 PM
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jahlg jahlg is offline
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Default electric fans

I found a dual fan setup with shroud from an 05 gto, can be had for 50 bucks, how hard will it be to hook up to my be-cool radiator, i can just wire to auxillary switch, so im not worried about thermostat. Any ideas??
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Old 02-25-2009, 03:13 AM
cudabob496 cudabob496 is offline
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Buy some 1/8 inch by 3/4 in by 3 or 4 ft lengths of aluminum at home depot, and make your own brakets. Careful with shrouds, as they may restrict air flow. I have an alum radiator in my 496 Cuda, and use a small electric fan with a large Chrysler shroud that allows a lot of air flow. I hardly need to turn on the fan, except at a light maybe. My hood is vented, and that allows max airflow through the radiator while cruising. MY shroud is in place using four lengths of aluminum about 8 inches long, bolted at each end.
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Old 02-25-2009, 06:33 AM
DartGT66 DartGT66 is offline
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The new production fans are often very powerful with a "soft" start controlled by the cars computer. they can eat a huge amount of current if started only by an on/off switch, prepare for some 50 amps... How do I know? I have used them in our cars.
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Old 02-25-2009, 10:27 AM
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is this something i should even use then, if the draw is that much, or should i just go with an aftermarket setup.like from Summit or jegs?? I dont want to draw a ton of amps, but my problem is that my existing mechanical has no shroud, and she gets warm real quick at a stop.
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Old 02-25-2009, 04:05 PM
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cageman cageman is offline
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Just wire it in with a relay, no big deal, the gto should have relays running it anyways. try to snag them too, along with the harness.
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Old 02-25-2009, 04:33 PM
cudabob496 cudabob496 is offline
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Most of the fans for sale in Summit draw 10 to 20 amps.
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Old 02-25-2009, 04:38 PM
cudabob496 cudabob496 is offline
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If you overheat at idle, then maybe increase idle to get more coolant flow. Also, use an electric water pump, so even at idle you get max engine coolant flow.
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Old 02-26-2009, 06:55 AM
DartGT66 DartGT66 is offline
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I have not found a relay big enough for our fans, they melt in about a zillionth second. I don't know the English word for the type of motor in thtos new fans, but they draw a LOT of current in the first five seconds or so after the start up, until they reasch the steady speed. They are not directly relay controlled oin those production cars.
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Old 02-26-2009, 09:34 AM
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well i got the fan setup, no relays with it though, but it is such a close fit to my radiator size, so i will make it work. The wires are there and end at the plug connector on the shroud. I looked at summit and jegs, and most of the fans there had a 40- 50 amp draw as well, so i figure to hook up 2- 30 amp relays, and i think that should do the trick, what do you guys think???? I am still learning every step of the way. I just want to be able to cruise cool!
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Old 02-28-2009, 08:28 AM
cudabob496 cudabob496 is offline
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I use Summit 14 inch electric fan on my 496 Cuda, with an aluminum radiator and electric water pump. Fan part number is Summit SUM-G4903, and it draws 8 amps.
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Old 02-28-2009, 11:21 AM
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Unless you have two fans with parallel wiring, two 30 amp relays won't do a thing for you.

I would look into a FORD starter relay or a glow plug relay. They are both designed to handle this much current.
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Old 02-28-2009, 04:36 PM
John Kunkel John Kunkel is offline
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Starter and glow plug relays aren't intended for continuous operation, there are similar relays that are rated for continuous operation like the Cole Hersee 24059...it's rated at 85 amps continuous.
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Old 03-01-2009, 03:05 PM
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OK next question is where do i find such a relay???
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Old 03-01-2009, 07:51 PM
John Kunkel John Kunkel is offline
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The part number in my last reply is wrong, I corrected it. Here's what you want:

http://www.marineexpressusa.com/prod...?prod=12-24059
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Old 03-06-2009, 08:17 PM
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thanks for the part number. Will that come with wiring instructions by chance??
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Old 03-06-2009, 09:29 PM
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What do you need instructions for? The relay is a rather simple setup. Attach the ground to one of the small posts. Attach the switched voltage (thermostatic sensor, toggle switch, etc) to the other small post. The other side of the switch will connect to the 12 VDC source. Connect the fan lead to one large pole. Connect the battery to the other large pole. Connect the other fan lead to ground. Make sure that all wires are of the appropriate gauge to handle the current.
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Old 03-10-2009, 11:41 AM
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I need directions cause i dont want to fry something!!! Is the relay the same as the solenoid that i asked about?? I am still learning here, so be gentle!!
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Old 03-10-2009, 08:02 PM
dodger1 dodger1 is offline
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jahlg, take a look here - might simplify Ed's instructions http://www.classictruckshop.com/club...osch/relay.htm
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  #19  
Old 03-10-2009, 09:22 PM
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pishta pishta is offline
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Quote:
Originally Posted by John Kunkel View Post
Starter and glow plug relays aren't intended for continuous operation, there are similar relays that are rated for continuous operation like the Cole Hersee 24059...it's rated at 85 amps continuous.
Yup, A hotrodder got wind of my idea of putting relays on my headlights and asked what I was using. I said the Bosch ones and he shook his head. They will burn out, use Ford starter solenoids. So the solenoid is a known BIG amp relay but he also stated that they make a constant duty one too but he thinks thay are the same with a different package. Ill take JK's word on this.
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  #20  
Old 03-12-2009, 12:43 AM
cudabob496 cudabob496 is offline
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I rewired my headlights using relays on my 72 Cuda. Amp draw went from 10 amps to 3 amps when lights are turned on. I'm sure the newer wiring had a lot to do with it.
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