Electric rad fans in hot climate areas ? - Defender Source
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  #1  
Old February 25th, 2013, 10:36 AM
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Electric rad fans in hot climate areas ?

Hi,

Anyone running electric rad fans in hot areas, esp the Flex-a-lite 292 setup ?

Am at the point where I need to order a new rad & have to decide between a mechanical VC or electrics. Engine is a 3.9 at present (will be a 4.6 later) and running Megasquirt so fans will be controlled off the ECU if I go electric. Just not 100% confident that twin 12's or 13's will be enough in the middle of summer. Can get prity warm here in the BC mountains.

Comments please.....
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  #2  
Old February 25th, 2013, 10:40 AM
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I was running electric fans on my 4.6L Disco and it ran very cool.

The Hooptie has a FAL setup. Aluminum rad with dual electric fans and oil cooler ports.
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  #3  
Old February 25th, 2013, 10:41 AM
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Pretty warm in BC Mountains? Don't think the 30Deg C you pretty much max out with is all that hot. Stick with the Viscous coupled fan. It works just fine in much hotter temps.
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Old February 25th, 2013, 10:43 AM
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Quote:
Originally Posted by Landy_Andy View Post
Just not 100% confident that twin 12's or 13's will be enough in the middle of summer.
Have you thought about a separate (read: big) oil cooler with dedicated fans?
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Old February 25th, 2013, 10:49 AM
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As long as the engine and cooling system is in good condition it shouldn't be an issue running the stock setup ... some of us run and RRC 11 blade fan which fits tighter in the NAS defender radiator shroud and possibly provides better cooling.

If you are really concerned and not running AC - I'd run a 11 blade setup with an auxillary push fan on the front of the radiator ... and see how many times you need to use it.

Don't buy a heavy duty fan clutch ... they just run the fan harder when you don't need it and suck gas as well as making lots more noise.
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Old February 25th, 2013, 10:54 AM
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Andy, just go by the wreckers and pick up the biggest fan that will fit. Have a look at the engine in the car that you are pulling it from. Does it have a lot more horsepower than your truck or not? don't waste money on a aftermarket fan. OEM fans from real cars are much better quality and much cheaper (used).

The key to using electric fans is choosing a large enough fan and doing the install, wiring and control to OEM levels. Once you do that, there will not be any problems.
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Old February 25th, 2013, 11:05 AM
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Quote:
Originally Posted by JSBriggs View Post
If you do alot of water crossong, electric is nice so you can switch it off. Beyond that id run a mechanical fan, and you can always add an electric on a thermal switch to automatically come on.

-Jeff
if you do a lot of water crossings ... get a diesel!
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Old February 25th, 2013, 12:04 PM
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I should clarify... don't have a rad or any fan's for it at present, be it VC or electrical. Will need to source whatever I use.... not much luck for getting one here from a wreckers, nearest one is a couple of hrs away

Will be fitting a remote engine & trans oil cooler, both with fans on stats.

Can someone throw up a pic of the NAS VC fan shroud, is it a 2 part item ?

Thanks !

------ Follow up post added February 25th, 2013 09:05 AM ------

Quote:
Originally Posted by Red90 View Post
The key to using electric fans is choosing a large enough fan and doing the install, wiring and control to OEM levels. Once you do that, there will not be any problems.
Control would be off Megasquirt if I go that way, the ECU is already modded for fan control.
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