The rad a good place for a electric fan temp switch?

Sun 29 Apr 12 17:54

The rad a good place for a electric fan temp switch?

Guys,

The electric fan in the car is operated by a switch - aint the smartest setup, so want to change it for a thermostatic setup where the electric fan automatically comes on when it hits 180deg.

In terms of a location (other than the block) is the drain plug a good location to put a temperature switch for the electric fan? I'm looking to have the switch kick in at 180 and off at 160/170.

I'm looking to put in the bottom left corner of the radiator below:



If so, what size temp switch do I need based on the size of the magnetic drain plug below? (sorry, useless at this stuff! )

Sun 29 Apr 12 19:30

Re: The rad a good place for a electric fan temp switch?

On the basis that heat rises - the bottom of the rad may not be the best position. If you look at Demon Tweaks, Burton Performance etc etc they usually offer a sensor that you place in the flexible top hose - to fit it you may need to cut the hose in half and re-connect with a short length of steel pipe and a pair of clamps.

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'68 coupe - 4 speed - 3.08 - F41 - 489 cu in - 528 bhp @ 5850 rpm - 565 ft/lbs torque (766 Newton Metres) @ 3850 rpm - (225 bhp & 465 ft/lb Torque @ 2500 rpm)

Act like a juvenile before turning senile !

Sun 29 Apr 12 20:03

Re: The rad a good place for a electric fan temp switch?

Yeah, saw those - but is there going to be that much of a difference between the top and bottom of the rad? I wanted to try and keep the install as clean as possible...

Sun 29 Apr 12 20:55

Re: The rad a good place for a electric fan temp switch?

EIRE V8 wrote (View Post):Yeah, saw those - but is there going to be that much of a difference between the top and bottom of the rad? I wanted to try and keep the install as clean as possible...

If there's not much difference...... do away with the rad!!!!

It'll be a lot cleaner

Last edited by Cooky on Sun 29 Apr 12 20:56; edited 1 time in total. [11 %]

Sun 29 Apr 12 21:04

Re: The rad a good place for a electric fan temp switch?

So true!

Sun 29 Apr 12 21:16

Re: The rad a good place for a electric fan temp switch?

remember heat radiates in all directions, hot AIR rises

best location is the cylinder heads

dave

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78 Corvette - Custom built 383 sbc - with Fast XFI and borg warner S400 turbo(nearly ready to install)

Sun 29 Apr 12 21:24

Re: The rad a good place for a electric fan temp switch?

surely you would want the stat on the inlet hose to the engine as the thermastat controls the water going into the rad, the rad then cools the water and returns it into the engine. so you only need the fans on when the water returning to the engine is to hot.

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if you can't beat me get out the way
2004 yellow C5 convertible manual
cray scorpions 19&20 chrome
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chromed everything
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Sun 29 Apr 12 23:25

Re: The rad a good place for a electric fan temp switch?

thanks for the replies guys.... think I'll go with the unit in the head.... just need to get the plug out now as its siezed a bit.... nothing a torch wont fix!

Mon 30 Apr 12 12:20

Re: The rad a good place for a electric fan temp switch?

Got one of these in my top hose.. Works a treat!!

http://www.cbsonline.co.uk/product/Adjustable_Fan_Controller...