Electric Rad Fan, Alternator question

[Copperman]

I am looking to do an electric cooling fan conversion on my truck. I have read all the threads on various fans from other vehicles (jeep, lincoln, altima, etc)
I can pick up a Derale dual fan unit pretty cheap. But it does draw a lot of amps (50) I don't know if this is continuous or not but its still a lot.

I have been looking at the CS alternator upgrade and I'm curious what size you think I would need. CS130 or CS144?

I do not have a stereo system other than a radio. I have AC and thats about it for amp pullers other than the lights at night. Thanks...

[Sammy]

I just done the dual fan with serp and upgraded to the CS130. Output on some of them are 95-140 AMPs depending on the one you get. Mine was off a 72GMC 3/4T 4 WD with Air. Listed as 105 AMPS. Considering these ol trucks only came with 40 - 45 amp Alt. max Don't you think 100 Amps is enough? You sure about those fans drawing 50 AMPS sounds a tad high.

[Copperman]

Originally Posted by Sammy

You sure about those fans drawing 50 AMPS sounds a tad high.

Thats what it states: http://www.jegs.com/p/Derale/Derale-...61386/10002/-1

PN 259-16934

I really don't want to go higher than 100 amps if I dont have to.

Do you have to use new brackets for that alternator?

[Sammy]

I went checked my 16 in Zirgo fans draw 10 amps a piece. I used Serp brackets. I ordered the adapter plug from painless. Maybe go to a less amp draw fan might be easier on you? These fans are only 2 1/2 thick rated @3450 cfm.

[stellar]

CS 130 should carry it, but the CS144 is better in every way, More amps, more dependable. It is physically larger, but if you have room to mount it I would use the CS144. If you are going to change, why not spend a few extra dollars now and be done with it while having a better unit. Use relays to power the fans. Mark

[Copperman]

I got the room....any idea what brackets I would use with that alternator? I assume they would be a little longer to stay away from the valve covers.

[stellar]

I don't know what brackets you will need. The CS144 is about the same size front to back with the post possibly a little longer. The diameter is bigger and the distance from pivot bolt to adjusting bolt is longer.

[Copperman]

What's the purpose of leaving the Red and White wires connected on the old regulator? What purpose do they still serve with the new alternator?

[treman03]

This is all you need.

http://www.dccontrol.com/0820.htm

Alt. from here http://www.db-starter-alternator.com/

and a crown victoria electric fan

plenty of CFM....

[Copperman]

Originally Posted by Copperman

What's the purpose of leaving the Red and White wires connected on the old regulator? What purpose do they still serve with the new alternator?

Anyone?

[Sammy]

I don't think they are left connected. you U the two on the inside to make a loop n two outside ones..

[Sammy]

I stand corrected. You no longer need that connection. If you desire could remove the regulator n discard it. Noit sure why you need the two inside ones to make a complete loop unless thats how to get a reading on your amp gage.

[Copperman]

Originally Posted by Sammy

I stand corrected. You no longer need that connection. If you desire could remove the regulator n discard it. Noit sure why you need the two inside ones to make a complete loop unless thats how to get a reading on your amp gage.

That's kind of what I thought and it makes sense. Thanks.

[Copperman]

Originally Posted by treman03

This is all you need.

http://www.dccontrol.com/0820.htm

Alt. from here http://www.db-starter-alternator.com/

and a crown victoria electric fan

plenty of CFM....

I know this is an old thread but I'm finally getting around to doing this mod. I was curious if you have any pics of this mod? Does the Crown Vic fan do a good job of covering the radiator?

[utee05]

What alternator did you end up getting? I'll be looking to do similar mod to my truck as well. I have a '72 GMC 1500

[dwcsr]

Originally Posted by Copperman

I know this is an old thread but I'm finally getting around to doing this mod. I was curious if you have any pics of this mod? Does the Crown Vic fan do a good job of covering the radiator?

This will get you fixed up on the fan

http://www.thehollisterroadcompany.com/MarkVIII.html

[Dustytrix]

Have you checked on the oem fan for a chevy HHR? You can get a new one for around $50 from rock auto. Thats what I used.

[Copperman]

Originally Posted by utee05

What alternator did you end up getting? I'll be looking to do similar mod to my truck as well. I have a '72 GMC 1500

I ended up ordering this one: http://www.db-starter-alternator.com...adr0335-c.aspx

Originally Posted by dwcsr

This will get you fixed up on the fan

http://www.thehollisterroadcompany.com/MarkVIII.html

Great article. I bought this fan a few weeks ago.

[VetteVet]

The brown wire on the regulator will have to go to the "L" terminal on the CS alternator and it will need to have a resistor installed inline to protect the diodes in the alternator. This website will describe how to do that.

http://temp.corvetteforum.net/c3/zma...ternator01.htm

You can simply wire the brown and white wires together and then put the resistor in the white wire before it connects to the "L" terminal. Then you will need to connect the red and blue wires together and connect the blue wire to the "S" terminal on the alternator to provide the sensing feature for the alternator field.



This diagram is for the SI alternator so the terminals will be different than the CS but they are essentially the same. You can simply loop the S terminal back to the large terminal on the alternator but following the diagram will give the alternator a much better sensing feature for the voltage drop in the wiring circuits especially since you're running the fans and speakers.

[treman03]

Originally Posted by Copperman

I know this is an old thread but I'm finally getting around to doing this mod. I was curious if you have any pics of this mod? Does the Crown Vic fan do a good job of covering the radiator?

I tried the Taurus fan but it did not cover the radiator like I liked. I did not feel like it moved the air like the Crown Vic fan. I have the Crown Vic fan on my '88 and '99. Fan has been on the '99 for 11 years now. I have about 1" of radiator showing on each side of the fan. Covers the radiator totally from top to bottom. Thought I had pics on my laptop but I don't.