viscous-vs-electric fans

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9th October 2009, 12:35 PM
Dougal

Quote:

Originally Posted by mike 90 RR

... You want the "lock out switch" to prevent them coming on, if water shorts out the relays (or what ever) when crossing / water splashing about the engine bay ...

You don't want em to turn on, when submerged and pulling water /// (Pull the main fuse prior, would be the go)

Mike
:)

I run a diesel, so water splashing doesn't scare me much. You guys with spark plugs, I can smell the fear already.:D
9th October 2009, 12:46 PM
mike 90 RR

Quote:

Originally Posted by Dougal

I run a diesel, so water splashing doesn't scare me much.

You may have missed my point ... You don't want the fans to work when submerged because "Electricity & water don't mix" :eek:

Quote:

Originally Posted by Dougal

You guys with spark plugs, I can smell the fear already.:D

.... I'll put more "underarm spray" on :p

Mike
:)
9th October 2009, 12:49 PM
Dougal

Quote:

Originally Posted by mike 90 RR

You may have missed my point ... You don't want the fans to work when submerged because "Electricity & water don't mix" :eek:

It's 12v. You can put your tongue on that.
9th October 2009, 12:57 PM
mike 90 RR

Quote:

Originally Posted by Dougal

It's 12v. You can put your tongue on that.

You can also ark weld with it too :twisted:

https://www.aulro.com/afvb/

Mike
9th October 2009, 06:22 PM
Dougal

Quote:

Originally Posted by mike 90 RR

You can also ark weld with it too :twisted:

http://publius.mu.nu/archives/welding-thumb.jpg

Mike

Yes but you can't arc weld with water. You can however arc-weld under water. Showing that water has enough conductivity to screw with electronics, but not enough to electrocute you because your fan motors got wet.

[ame="http://www.youtube.com/watch?v=mvBG_Ly-2I8"]YouTube - Underwater Welding[/ame]
9th October 2009, 07:21 PM
Crackerjack

I think that if you are having overheating problems with electric fans you have a poor installation or faulty cooling system, first you need proper fans designed for the job, not some rubbish from a scrap yard that used to be in a Toyota Corolla, then it needs to be fitted well and controlled by a good thermostat.
I have fitted twin Kenlowe fans to my V8 discovery with a non Kenlowe (far superior) inline adjustable thermostat with all the relays sealed in a box and everything running heavy wire, even on a warm day I can't get the things to come on, they were fitted on a new radiator.
You have to look at your cooling system as a complete package, if you are overheating you need to investigate why, there are many reasons why you could overheat.
If you are off roading the viscous fan isn't going to do much until it locks up, steals your power and drowns out all conversation in the area, on the freeway the fan isn't needed but is still turning with your engine.
This comment isn't a reflection of any equipment used by members in this thread but I feel that you are turning your back on a very good piece of kit which if used properly does a very good job.
9th October 2009, 07:45 PM
djam1

Quote:

Originally Posted by Crackerjack

I think that if you are having overheating problems with electric fans you have a poor installation or faulty cooling system, first you need proper fans designed for the job, not some rubbish from a scrap yard that used to be in a Toyota Corolla, then it needs to be fitted well and controlled by a good thermostat.
I have fitted twin Kenlowe fans to my V8 discovery with a non Kenlowe (far superior) inline adjustable thermostat with all the relays sealed in a box and everything running heavy wire, even on a warm day I can't get the things to come on, they were fitted on a new radiator.
You have to look at your cooling system as a complete package, if you are overheating you need to investigate why, there are many reasons why you could overheat.
If you are off roading the viscous fan isn't going to do much until it locks up, steals your power and drowns out all conversation in the area, on the freeway the fan isn't needed but is still turning with your engine.
This comment isn't a reflection of any equipment used by members in this thread but I feel that you are turning your back on a very good piece of kit which if used properly does a very good job.

Whats a warm day though
9th October 2009, 07:52 PM
Crackerjack

We actually were able to take our jumpers off a couple of weeks ago :lol2:

But really, temps in the mid 20's

When I get the fans to come on they do pump a lot of air, (I have to fiddle with the adjustable thermostat to get them to come on)
9th October 2009, 07:57 PM
V8Landy

Quote:

Originally Posted by Crackerjack

I think that if you are having overheating problems with electric fans you have a poor installation or faulty cooling system, first you need proper fans designed for the job, not some rubbish from a scrap yard that used to be in a Toyota Corolla, then it needs to be fitted well and controlled by a good thermostat.
I have fitted twin Kenlowe fans to my V8 discovery with a non Kenlowe (far superior) inline adjustable thermostat with all the relays sealed in a box and everything running heavy wire, even on a warm day I can't get the things to come on, they were fitted on a new radiator.
You have to look at your cooling system as a complete package, if you are overheating you need to investigate why, there are many reasons why you could overheat.
If you are off roading the viscous fan isn't going to do much until it locks up, steals your power and drowns out all conversation in the area, on the freeway the fan isn't needed but is still turning with your engine.
This comment isn't a reflection of any equipment used by members in this thread but I feel that you are turning your back on a very good piece of kit which if used properly does a very good job.

I used el thermo's which are sworn by a lot of people to be the goods. I had mine checked by a well respected (in our community) Auto electrician.
I had no issues before i installed the elec fans and none while normal driving or 4wding but as soon as i put weight on the back up went the temp. I seriously suggest if you do any towing not to go elec fans as mine is fine when viscous is on but not elec.
As for the elec fans pushing more on idle as a viscouse i say bull****. just my opinion.
9th October 2009, 08:41 PM
d2dave

Quote:

Originally Posted by mike 90 RR

This is not a Hot idea as you also stop the coolant flow, moving around the block & heads

This is also not a Hot idea ... cause if the Temp rises while on dry ground ... then the viscous will "lock up" while "being locked up"

If you want to stop the fan for a water crossing ... Remove it, before crossing

Mike
:)

This then answers my question.
I wasn't sure whether the viscous actually locked or when hot just worked harder.

Dave.

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