Electric fan problems

[OldToys]

I have a 68 GTX 440

I'm on my third alternator and second time I have had to rewire the alternator amp gauge circuit. The first time I wired it I used the fusible link, lot of good that did, burnt the insulation but the wire stayed in tack.
The electric fans pull 38 to 45 amps and the alt just cant handle it. This time I used 10 gauge wire and bypassed the bulkhead connector hoping it wont happen again. I think I should just pull the electric fans and go back to the original set up. The problem is I bought it with electric fans so I'm not sure if I have enough clearance I need with this champion radiator. Could someone tell me the clearance needed for a fan and fan clutch? I'm open for any other ideas? I'm not sure if I can get lower amp fans?
Thanks for the help, Tim

 

[5.7 hemi]

Are you using relays to the fans?

 

[HT413]

Let me go and measure mine in a sec... I just installed it...

Better yet, here's the catalog. http://www.haydenauto.com/upload/HaydenAuto/Documents/Cat_Hayden/2007-hayden-fan-clutch.pdf

I just installed the Hayden 2765 clutch and the hayden 3619 clutch fan (19"). The clutch is off of a jaguar but is a popular swap to improve clearance. It's 2.67" tall and the fan does not extend out past the face of the clutch toward the rad... in fact, it sits right about 3/4" back away from the face of the clutch.

Post some pics of your setup. I just got done solving my MAJOR clearnace issues caused by my 413 truck motor and oversized harmonic balancer. If i have the room, i'd say almost any b body has the room.

Btw, sounds like you're running the full amperage of the fans throught the ammeter and overloading it. You need to set up control relays and that might solve your problems.

Oh, and what champion rad do you have? Any of the 2 rows are thinner than the stock rad i think, and the 3 row is only like 1/4" thicker or so, so i dont think it should hurt you.

 

[bigmanjbmopar]

I didn't have the room for the clutch-26" 3 row champ rad, went with a flex fan, shroud and pusher 14" electric fan in front set at 210 works wonders.

However, my set up is not stock, I have a 100 amp alt and no amp gauge now a volt gauge.

 

[OldToys]

I didn't have the room for the clutch-26" 3 row champ rad, went with a flex fan, shroud and pusher 14" electric fan in front set at 210 works wonders.

However, my set up is not stock, I have a 100 amp alt and no amp gauge now a volt gauge.

I Bet I have the same radiator, it just doesn't look like I have enough room to run a fan clutch. I will get a picture later today. I have a dual fan set up, and you can see that I wouldn't have room for a single electric fan because of clearance.

I would love to get your info, What fan and shroud are you using with the champion and where did you get the 90 amp alt.?
This would be a huge help.

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Are you using relays to the fans?

Yes I do

 

[bigmanjbmopar]

Mine is 18" flex fan, shroud is specter from Summit. I even have room to put another half shroud on the bottom. Front is an electric 14" set up to push with relay set for 210°

 

[wannadrag]

I Bet I have the same radiator, it just doesn't look like I have enough room to run a fan clutch. I will get a picture later today. I have a dual fan set up, and you can see that I wouldn't have room for a single electric fan because of clearance.

I would love to get your info, What fan and shroud are you using with the champion and where did you get the 90 amp alt.?
This would be a huge help.

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Yes I do

3 row champion in my 68 GTX,fixed non clutch fan and have about 3/4 to 1 inch of clearance,no shround and will idle all day and not overheat.Still running the stock 60 amp alt.

 

[67 coronet]

i run twin fans on most of my projects here in the desert.just seem to work better then mechanical setups.your draw sounds a bit high.you can find high output alts in either jegs or summit racing in many designs and amp ratings.

 

[OldToys]

Update..Once I got the electric fans off I decided to try a fan clutch. It is very close I have approx. 3/8" clearance between the radiator and the clutch. The fan has plenty of room.
Without a fan shroud it runs cooler at low speeds then it did with the electric fans. At highway speed it is about the same as the electric. It seems the only thing I gave up is sitting on the side of the highway waiting on tow trucks.
The amp gauge is happy too its not pegging the charge.
The electrical circuit just couldn't handle the extra amps of the electric fans.
My advice on anyone thinking about electric fans make sure you have beefed up the circuitry to at least 8 gauge wire, and bypass the amp gauge.
Thanks for all the help.

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Once summer hits If I need more cooling I will add a single pusher fan.

 

[Dennis H]

26 inch factory radiator. Clutch fan. Shroud. Green coolant. 180 Superstat. 500 horse. Cool. All day long. MaMopar knew what to do. Copper still works. No tow trucks.

 

[HT413]

Update..Once I got the electric fans off I decided to try a fan clutch. It is very close I have approx. 3/8" clearance between the radiator and the clutch. The fan has plenty of room.
Without a fan shroud it runs cooler at low speeds then it did with the electric fans. At highway speed it is about the same as the electric. It seems the only thing I gave up is sitting on the side of the highway waiting on tow trucks.
The amp gauge is happy too its not pegging the charge.
The electrical circuit just couldn't handle the extra amps of the electric fans.
My advice on anyone thinking about electric fans make sure you have beefed up the circuitry to at least 8 gauge wire, and bypass the amp gauge.
Thanks for all the help.

- - - Updated - - -

Once summer hits If I need more cooling I will add a single pusher fan.

Looks like maybe you are running the oem style clutch (hard to tell). If you want more clearance try the hayden 2765 thermal clutch - according to the hayden catalog, it'll give you an extra 0.93" of clearance. Though be warned, because the clutch is shorter it is a heck of a job getting those water pump bolts in lol.

 

[OldToys]

Looks like maybe you are running the oem style clutch (hard to tell). If you want more clearance try the hayden 2765 thermal clutch - according to the hayden catalog, it'll give you an extra 0.93" of clearance. Though be warned, because the clutch is shorter it is a heck of a job getting those water pump bolts in lol.

Calls out for a Jaguar, XJ6, XJS....Have you tried it on a B Body?

 

[HT413]

Calls out for a Jaguar, XJ6, XJS....Have you tried it on a B Body?

It's a popular upgrade for all old mopars that have clearance issues due to new thicker radiators, etc, as it fits the stock mopar fan bolt pattern as well as the wp pilot and bolt pattern. my pic above shows the jag clutch in my 69 belvedere. it gives me about 3/4ths of an inch (if i recall) between clutch and rad, whereas i wouldn't have the room to even fit the stock size clutch.

I cant say how well it cools with my new rad, clutch, hayden fan and high flow 440source water pump as i havent gotten it running since the install.