looking to ditch the underdrive alt pulley

aar0s

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Dec 20, 1998

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Jul 5, 2011

#1

• Jul 5, 2011

• #1

The warm idle low charging, even with the 130 amp, is starting to bug me. Someone told me one time where to find the pulley on the aftermarket but i cant remember, not sure where mine went to (or my wiper arms for that matter) anyone have one laying around or know where i can find one?

 

NIKwoaC

中國製造

15 Year Member

Oct 31, 2006

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Jul 5, 2011

#2

• Jul 5, 2011

• #2

Can't really help you with where to find one, but make sure that the pulley you have now is actually a different diameter than a stock one. I know some under drive kits actually only reduce the size of the crank pulley, and the alt pulley stays the same size.

 

aar0s

Founding Member

Dec 20, 1998

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Jul 5, 2011

#3

• Jul 5, 2011

• #3

It is, i remember how much bigger is was than the stocker.

 

Boosted92LX

It's only an inch or two. What's the big deal?

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#4

• Jul 6, 2011

• #4

If you can't find one off craigslist or ebay try Frank-n-stangs. I think his email is onebad93lx@yahoo.com

 

aar0s

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Dec 20, 1998

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#5

• Jul 6, 2011

• #5

I didnt even think about that dude, Thanks!

 

torch93

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Aug 14, 2010

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bakersfield c.a

Jul 6, 2011

#6

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• #6

Soo the aftermarket alt pulley gives you better charge at idle!? And p.s ya I would try craiglist good chance if finding the whole kit for real cheap! I got mine for 30 buks for the whole water,crank, and alt! I gave my alt pulley to my brother cuz I thought it would burn out the alt.. Well now I have a 130 and was thinking about the pulley..

 

Beasty306GT

Active Member

Dec 19, 2002

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Oxford,Mass

Jul 6, 2011

#7

• Jul 6, 2011

• #7

I got same problem with mine at idle..what size pulley are u going with

 

wht93gtEd

Active Member

Nov 11, 2004

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Jersey Shore, New Jersey

Jul 6, 2011

#8

• Jul 6, 2011

• #8

go to Advance auto, buy alternator, swap pulleys, return it and tell them it wasn't teh alternator that was bad; just wiring and you don't need it.

they will accept return and give money back.

 

aar0s

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Dec 20, 1998

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Jul 6, 2011

#9

• Jul 6, 2011

• #9

torch93 said:

Soo the aftermarket alt pulley gives you better charge at idle!? And p.s ya I would try craiglist good chance if finding the whole kit for real cheap! I got mine for 30 buks for the whole water,crank, and alt! I gave my alt pulley to my brother cuz I thought it would burn out the alt.. Well now I have a 130 and was thinking about the pulley..

Click to expand...

no the underdrive pulley wont charge at warm idle, cold idle it does fine but after the car warms up and idle drops to 650 or so it wont charge. I remember seeing somewhere that sold a stock type pulley but cant remember where it was.

Ive got my stock pulley around here some where, probably with the wiper arms i cant find

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Jul 7, 2011

#10

• Jul 7, 2011

• #10

ASP makes them. 3 different sizes, all about $20. I run the 1 7/8" pulley with under drive crank. At idle, no charging issues at all.


Edit: here's one of them. Google or search summit for the right one for you as they make a few finishes and sizes

Auto Specialties 520004 - Auto Specialties Overdrive Alternator Pulleys - Overview - SummitRacing.com

With a 3G alternator, you will need a 5/8" dia hole washer to use as a spacer, or the pulley will hit the 3G case

 

aar0s

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Dec 20, 1998

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Jul 7, 2011

#11

• Jul 7, 2011

• #11

bingo, thats what im looking for. thanks!

 

Beasty306GT

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Dec 19, 2002

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Oxford,Mass

Jul 7, 2011

#12

• Jul 7, 2011

• #12

will the stock pulley work with underdrive water pump and crank pulleys? or do i need the one posted above..im having same problem with mine myself

 

aar0s

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Dec 20, 1998

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Jul 7, 2011

#13

• Jul 7, 2011

• #13

I think the stocker will work with the underdriven WP and crank.

 

90mustangGT

I felt sorry for girls because

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Dallas, GA

Jul 7, 2011

#14

• Jul 7, 2011

• #14

Well the stock alternator pulley will spin the alternator faster even with the U/D crank pulley. But fast enough? Depends, it's worth a shot.

I have U/D's and I am thinking of at least putting my stock crank pulley on there or just doing the stock alternator pulley. I deleted the A/C and P/S so there really isn't much bennifit to them anymore, except poor charging.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,260

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Jul 7, 2011

#15

• Jul 7, 2011

• #15

Try the stock crank or an overdrive pulley. The water pump is actually a big HP draw.

 

Beasty306GT

Active Member

Dec 19, 2002

671

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Oxford,Mass

Jul 7, 2011

#16

• Jul 7, 2011

• #16

i dont have stock pulleys i bought the car with underdrive pulleys ..but when i bought my 3g it had the stock pulley and i swapped it to the underdrive its a 1/4" bigger than the underdrive.