Will an electric fan an underdrive pullies kill my stock alt?

8

87lc2

Member

Oct 16, 2005

214

0

17

Oct 16, 2006

#1

• Oct 16, 2006

• #1

Was going to put my electric fan (proform) in this weekend along with my ac delete and marhc underdrive pullies. However, i just thought, will this fan along with these pullies kill my alternator? i really dont want to upgrade my alternator, so if i do Ill just return the fan....any experiences or opinions appreciated

 

Snikt89GT

New Member

Sep 6, 2006

264

1

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Deland, Florida

Oct 16, 2006

#2

• Oct 16, 2006

• #2

I wouldn't run that setup on that stock POS. You need a 3G for it to work properly.

 

90

Active Member

Sep 24, 2006

0

1

43

Michigan insane asylum

Oct 17, 2006

#3

• Oct 17, 2006

• #3

when mine got put on it was hard wired direct to the battery with a toggle switch under the steering wheel.. ive only blew one fuse, just make sure it dosent stay on after you shut your car off.. that will fry your battery for sure a stock alt should keep a charge on it my 90 holds Well.. Good luck!

 

poneypower89

Now everyone in the world will know I wanna bang t

Dec 6, 2004

0

3

28

Indianapolis, Indiana

Oct 17, 2006

#4

• Oct 17, 2006

• #4

the stock alt has a hard enough time running ANY extra eletric components.. Hell, my dash lights dim and brigten with the revs of the car. (just ever so slightly... I've had 3 foxs... all the same)

An underdrive pulley will only further complicate things. Do yourself a favor and buy a 3g alt BEFORE you install that fan.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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129

Oct 17, 2006

#5

• Oct 17, 2006

• #5

If you live in the Arctic Circle it might work alright. It's not something I personally would do however.

Good luck.

 

D

dude5l

Founding Member

Dec 24, 2001

201

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0

Grande Prairie, Alberta , Canada

Oct 17, 2006

#6

• Oct 17, 2006

• #6

Ditch the pulleys if you use the elec. fans, and don't wire them up without using a relay.

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

2,120

2

59

windsor, Canada

Oct 17, 2006

#7

• Oct 17, 2006

• #7

My 100amp barely keeps up when she's hot and I even think about putting on the headlights while....a 75amp alt will not survive or perform well.

 

srothfuss

Last night I stabbed the same guy 7 times in a row

Oct 17, 2004

1,796

3

0

Woodward Ave.

Oct 17, 2006

#8

• Oct 17, 2006

• #8

You'll need an overdriven 3G (130Amp minumum) alternator to properly supply enough power for an electic fan while using underdriven pulleys.

trust me....

 

Snikt89GT

New Member

Sep 6, 2006

264

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Deland, Florida

Oct 17, 2006

#9

• Oct 17, 2006

• #9

I have a PA Performance 95amp 3G and it appears to be working fine. It does dip a little at idle with the fan on but it works fine so far

 

srothfuss

Last night I stabbed the same guy 7 times in a row

Oct 17, 2004

1,796

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Woodward Ave.

Oct 17, 2006

#10

• Oct 17, 2006

• #10

Try running the headlights, A/C, holding your foot on the brake and a small stereo with a electric fan....

A Overdrivien 3G alternator will supply enough power to run the car without relying on the battery for help. Thus no dipping of the volt-meter when you are in stop and go traffic.

Not saying other setups wont work, but it's was nice being able to turn everything on and not have the volt-meter move in traffic.

 

D

dude5l

Founding Member

Dec 24, 2001

201

0

0

Grande Prairie, Alberta , Canada

Oct 17, 2006

#11

• Oct 17, 2006

• #11

I'm still running the stock alt., with dual electric fans, and it sucks! have to keep it revved up at stoplights, and I don't trust it with the lights on. I'm surprised it's still hanging in there!

 

PhLoBuS

New Member

Aug 15, 2004

473

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0

Beverly, MA

Oct 17, 2006

#12

• Oct 17, 2006

• #12

Stock alternator is crappy even with a stock mustang. Definetly upgrade that thing.

 

BlooDReigN

Member

Feb 22, 2004

283

1

16

Calgary, Alberta

Oct 17, 2006

#13

• Oct 17, 2006

• #13

When I put underdrives on my other stang, the alternator couldn't keep up anymore, so I put in a 3G. Throw an electric fan on top of the underdrives and it's safe to say you probly won't be holding much of a charge in the battery.

 

rickd93_lx

New Member

Dec 22, 2005

162

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0

Oct 17, 2006

#14

• Oct 17, 2006

• #14

how about using an altenator from a sn95 i heard those run stronger or it could be from a 4.6(i just heard that), bracket has to be filed a little but would that work? just how much is a 3g in comparison to a rebuilt from your local auto parts store?

 

srothfuss

Last night I stabbed the same guy 7 times in a row

Oct 17, 2004

1,796

3

0

Woodward Ave.

Oct 17, 2006

#15

• Oct 17, 2006

• #15

A 3G is a alternator off of a 94+ mustang... There are a few variations of the actual housing that will almost bolt right in..

I used a 95GT Alternator on my old ride...

 

E

EmberGuitar

New Member

Feb 7, 2007

11

0

0

Feb 8, 2007

#16

• Feb 8, 2007

• #16

Well, I think you should asked an expert before putting that Proform fan.


_____________________
Proform Parts Catalogs - Get the latest Proform Parts Catalogs

 

sgarlic

Founding Member

Apr 21, 2001

3,085

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56

Feb 8, 2007

#17

• Feb 8, 2007

• #17

The week I had that Proform POS on my '88 was plenty of time for me to never buy a thing from that company again.

The only way you could safely run that fan on stock alt would be if you used the DCC controller.. and if you did that, it'd be a waste of money to buy the Proform. Might as well get a junkyard taurus fan and the DCC, pay about what the proform costs, and be set.

 

jrichker

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Mar 10, 2000

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Dublin GA

Feb 8, 2007

#18

• Feb 8, 2007

• #18

Electric fan = 3G alternator if you want long life & reliability from your car.
The electric fan saves some HP. The stock fan's parasitic drag runs from 7-12 HP depending on who you talk to. The electric fan uses about 1/2 HP of power from the electrical system.

Figure this:
Ignition system & computer = 12 amps
Fuel pump = 12 amps
Exterior lights = 15 amps
Fan (heater or A/C) = 15 amps (can run between 5-25 amps depending on setting)
Radio & instruments = 10 amps
Wipers = 10 amps

That's grand total of 74 amps from a 65 amp alternator. Talk about overdrawn at the bank!

 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

15 Year Member

Nov 11, 2003

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Northern KY

Feb 8, 2007

#19

• Feb 8, 2007

• #19

Right now i'm running a electric fan, aftermarket ignition (of sorts...it's a Mallory Unilite dissy that has it's own ignition), and the usual tach/stereo stuff, and my stock alt is crying for mercy. I'd venture to say that with UD pullies it would be 10 fold worse.

On top of that, i've got 100w bulbs in my fob lamps, so when the brights come on at night, and the radio is on....i'm on borrowed time...lol. I've got a 3g planned along with a new engine this spring.

 

EXTRPR50

Founding Member

Oct 7, 1998

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Feb 8, 2007

#20

• Feb 8, 2007

• #20

Anyone knwo where to get this 3g alt. and how much it is? Can I just order one? From where?