Help with 130Amp Alt. & Underdrive pullies!!

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gooch06

New Member

Sep 23, 2004

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Oct 21, 2005

#1

• Oct 21, 2005

• #1

I'm looking to upgrade my 1990 LX 5.0 alternator to a 130 AMP. Can I use my Ford Motorsport Underdrive pullies with the 130AMP Alternator? What will it do if I put back on my stock Alternator pulley?

 

TC93

Well-Known Member

Sep 11, 2000

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Ellerslie GA 31807

Oct 21, 2005

#2

• Oct 21, 2005

• #2

The pulley off the stock alt won't fit the 3G alt. Running the stockalt pulley with the other 2 UD pullies won't have any effect. Or atleast any you will notice..

 

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luckythirteen13

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Jul 19, 2005

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Anaheim, CA

Oct 21, 2005

#3

• Oct 21, 2005

• #3

dont run the alt UD. the alt draws so little power. youll be much happier with the extra electricity then the 1hp you may get from the UD on the alt.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Oct 21, 2005

#4

• Oct 21, 2005

• #4

Myke86GT said:

The pulley off the stock alt won't fit the 3G alt. Running the stockalt pulley with the other 2 UD pullies won't have any effect. Or atleast any you will notice..

Click to expand...

It will if you use a washer as a Spacer. I used a off-the-shelf washer from Home Depot as a spacer to run the stock 2G alt pulley on my 3G at.

I've since upgraded to an ASP 1 7/8" pulley. I run March Underdrives with the ASP pulley and have a full charge at idle even with an SN95 electric fan and a decent stereo

 

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5.0Perfections

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Oct 21, 2005

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Bama

Oct 21, 2005

#5

• Oct 21, 2005

• #5

I am in the same situation, I am upgrading my ALT to run PWR fans and MSD. Mine came with a PWR cord also...

 

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8950HO

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Mar 31, 2005

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Oct 21, 2005

#6

• Oct 21, 2005

• #6

Mustang5L5 said:

It will if you use a washer as a Spacer. I used a off-the-shelf washer from Home Depot as a spacer to run the stock 2G alt pulley on my 3G at.

I've since upgraded to an ASP 1 7/8" pulley. I run March Underdrives with the ASP pulley and have a full charge at idle even with an SN95 electric fan and a decent stereo

Click to expand...

Did you need the washer as a spacer with the ASP OD alternator pulley also?
What year is your 3g alt?
ASP told me awhile back that their 1-7/8" OD alt pulley would fit 3g`s up to 1995 because Ford used the same offset spacing as the 2g to that point.Beyond 1995,they weren`t sure,but said it should fit following years.

 

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Sicarius428

Active Member

Jan 6, 2004

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Oct 24, 2005

#7

• Oct 24, 2005

• #7

I just left the pulley that came on my pa-performance 130 amp with my other UD pullies and it charges just fine. I am not sure if you would notice too much of a difference either way.
Kevin

 

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gooch06

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Sep 23, 2004

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Oct 24, 2005

#8

• Oct 24, 2005

• #8

Thanks. Did you try the new alt with all 3 pullies? PA said you should be able to use all 3 underdrive pullies.

 

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Sicarius428

Active Member

Jan 6, 2004

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Oct 24, 2005

#9

• Oct 24, 2005

• #9

I just left the one that came with the Alt. just to be sure that I didn't have any charging issues(whole reason i switched). I guess I can change it now but I like where my voltage is so it works better for me.
Kevin

 

wake

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Sep 22, 2004

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Memphis,TN

Oct 24, 2005

#10

• Oct 24, 2005

• #10

My original pulley bolted right on the 3g

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Oct 24, 2005

#11

• Oct 24, 2005

• #11

8950HO said:

Did you need the washer as a spacer with the ASP OD alternator pulley also?
What year is your 3g alt?
ASP told me awhile back that their 1-7/8" OD alt pulley would fit 3g`s up to 1995 because Ford used the same offset spacing as the 2g to that point.Beyond 1995,they weren`t sure,but said it should fit following years.

Click to expand...

No, i am not using a washer with the ASP pulley.

My Alt is a parts store alt specified for a '95 GT. It fits fine with plenty of room

 

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Low86GT

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Apr 9, 1999

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San Jose, CA

Oct 25, 2005

#12

• Oct 25, 2005

• #12

The stock pulley on the all 3 of the 3g alts that I have done are the exact same size as what was in the underdrive kit.
I used the pulley from my underdrive kit (polished) on one of them with no spacer and it fit just fine.