Under Drive pullies

89CobraGT

New Member

Dec 14, 2005

113

0

0

Winnipeg manitoba

May 15, 2007

#1

• May 15, 2007

• #1

hey... So I was going to install my underdrive pullies but I'm thinking I'm gonna have some charging issues with my electric fan and stereo it pulls alot of power. I was wondering if I can just install the pully for my water pump and crank.. Will my car still run ok even though the pullys dont match I also have power steering but Ive never seen a pully for that... anways any input would be apperciated..
thanks

 

Bullitt347

I have been doing it wrong this whole time

15 Year Member

Mar 23, 2007

3,943

2,897

194

Middle of Maine

May 15, 2007

#2

• May 15, 2007

• #2

You can run just 1 of the underdrive's if you would like. It depends on whose pulleys you use. I believe Auto Specialties makes an underdrive P/S pulley.

 

89CobraGT

New Member

Dec 14, 2005

113

0

0

Winnipeg manitoba

May 15, 2007

#3

• May 15, 2007

• #3

soo I can run my crank pully and my waterpump pully?? I'll have t look for the p/s one thanks!!

 

AnthonyR23

Member

Sep 8, 2006

661

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16

Ontario

May 16, 2007

#4

• May 16, 2007

• #4

I would suggest upgrading to new 130amp 3g alternator.. with a overdrive pulley.. if you can't do the alt. upgrade at least get a overdrive pulley for your old one.. mine was about 18.95.

 

04sleeper

Founding Member

Jun 22, 2002

2,674

14

89

Dallas, TX

May 16, 2007

#5

• May 16, 2007

• #5

The best setup for the street that I have found is the 4" underdrive crank pulley, stock water pump pulley and 1 7/8 overdrive alternator pulley.

I do suggest running the 130amp alternator like mentioned.

A good place to source the alternator pulley is here. http://rjminjectiontech.com/?p=7

 

P

PJB

New Member

Aug 22, 2006

131

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0

Rotterdam, NY

May 16, 2007

#6

• May 16, 2007

• #6

I used the underdrive waterpump and crank pullies but still had issues with charging when using the underdrive pulley on the alternator even though I upgraded to a 130 amp '94 Mustang GT alternator.
I ended up putting my stock '92 alternator pulley on the higher output alternator.

BTW the fox underdrive alternator pulley is the same size as the SN95 130 alternator amp pulley.

 

89CobraGT

New Member

Dec 14, 2005

113

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0

Winnipeg manitoba

May 16, 2007

#7

• May 16, 2007

• #7

I have a 100 amp alternator it works pretty good I just wanted to know if I could keep the stock pully alternator pully thanx

 

AnthonyR23

Member

Sep 8, 2006

661

0

16

Ontario

May 16, 2007

#8

• May 16, 2007

• #8

Well if you decide to get a high powered amp or electric fan and you notice that your voltage is too low... remember that overdrive pulley... it's pretty tiny... I'll send a pic...

 

P

PJB

New Member

Aug 22, 2006

131

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0

Rotterdam, NY

May 16, 2007

#9

• May 16, 2007

• #9

Basically putting the stock alternator pulley on the higher output alternator is overdriving it since the stock pulley is smaller.