windstar fans, which one for A/C?

[Cornfield creations]

I have installed the 95 windstar fans on my 79 k-5. I am trying to keep the temp up a little on my new 350 HO engine to keep it from building up carbon in the cylinders and to run cleaner all around. My temp switch is one from an 87 camaro, and is set at 210 I believe and a 180 thermostat. I was wanting to wire up one of the fans to turn on automatically to pull air through to cool off my A/c.

My question is which fan of the two would be the best to wire up? When I turn on the driver side fan it seems to cool off the radiator real quick and drop the engine temp. When I turn on the pass. side it seems to not cool off the a/c enough. It doesn't blow cold in town, but it does on the highway. I had a problem after I installed the fans that the temp built up and blew off the PRL on the back of the compressor and smoked my compressor belt.

I was thinking to wire up the driver side, and maybe put in a 195 thermostat in the engine to keep the temp up. I think thats what a GM tech told me should be in it.

Any suggestions to keep the a/c cool while keeping engine temp up?

 

[lak2004]

I would run a 195* thermostat and wire up the drivers fan. Are you going to wire it so it comes on with the A/C?

 

[JpEater]

You should have both fans rigged up to come on when the ac is on. You can rig one fan to come on at a cooler water temp like say 180. I would rig the second to come on at say 195-200. That would work as a progressive system so that you won't be pullin more amps than you need to. Bottom line though when the ac is on you need all the air flow you can get.

 

[Cornfield creations]

Yeah, I was hoping to wire it up so it comes on when I switch on the A/C. Right now I have it wired to be on auto all the time. Or manually turn it off altogether. Or I can turn each one on individually at any time. Should I wire it that when the A/C compressor is switched on that it will ground out the relays for the fans and turn them on? Or should I just let it go and turn them on manually myself?

 

[JpEater]

I would wire it so that it automatically come on when your AC comes on. If you forget to turn them on your AC will not work and could burn up your compressor.

 

[lak2004]

It sucks having to turn them on manually, I forgot just once and nearly overheated my 350.

 

[Cornfield creations]

I would wire it so that it automatically come on when your AC comes on. If you forget to turn them on your AC will not work and could burn up your compressor.

Where should I tap into the A/C system to wire them up?

 

[dyeager535]

I believe how GM did this on electric fan equipped cars was to use a pressure switch in one of the AC lines. I would think that to be a difficult solution in your case though.

Thermostat temp really doesn't matter, except the fact that your engine will cycle through a larger heat range, which although may mean very little, it's not going to be as beneficial as keeping the temp as constant as possible.

 

[JpEater]

Just use the power wire going to the compressor clutch to energize the cooling fan relay. The relay will use so little power that it will not draw away from the compressor clutch.

 

[Cornfield creations]

Just use the power wire going to the compressor clutch to energize the cooling fan relay. The relay will use so little power that it will not draw away from the compressor clutch.

Well the way it is now, I have it wired up so the power is always on, and once the temp switch activates it grounds out the ground on the relays. Same way with my switches, so that way I don't have all these hot wires running everywhere. It is just a series of grounds.