Who Would Have Thought...

Gear grabber

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May 23, 2016

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Dec 27, 2016

#1

• Dec 27, 2016

• #1

...it would be so hard to find a 2.5'' aluminum 3g pulley.
I am not having much luck.

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

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Dec 27, 2016

#2

• Dec 27, 2016

• #2

http://marchperformance.com/ford-sm...ratio-6-rib-serpentine-alternator-pulley.html

 

Gear grabber

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May 23, 2016

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Dec 27, 2016

#3

• Dec 27, 2016

• #3

Thanks,i have seen that. The link says 79-93 (2g)
Will that work on a 3g ?

 

Noobz347

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#4

• Dec 27, 2016

• #4

http://www.stangnet.com/mustang-forums/threads/3g-alternator-pulley.722485/

 

Gear grabber

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May 23, 2016

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Dec 27, 2016

#5

• Dec 27, 2016

• #5

Now the link goes to part #228 2 3/8 replacement pulley.

 

Noobz347

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#6

• Dec 27, 2016

• #6

The first link I posted is for an aluminum alternator pulley.

The information in the second link explains how to use a 2G pulley on a 3G alternator.

On a side note: UD pulleys are a waste of time and money. The stock 3G alt pulley is effectively an underdrive for a Fox. It can cause charging problems at idle. The 2G pulley has a slightly smaller OD and works well at idle on a 3G alt.

 

Gear grabber

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May 23, 2016

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Dec 27, 2016

#7

• Dec 27, 2016

• #7

My concern right now is max alt. speed. With my 6'' crank pulley
2.25'' alt. pulley and 7k limiter,the alt. will see brief periods of
18,666 rpm. With a 2.5'' it will see 15.6k at 6500 shift and 16.8
at 7k.

 

Noobz347

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#8

• Dec 27, 2016

• #8

Then you should stick with the OEM 3G pulley.

 

Gear grabber

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Jan 16, 2017

#9

• Jan 16, 2017

• #9

A couple weeks ago,i picked up a 66mm (2.59'') pulley from PA Performance.
So far no charging problems. My car has a fairly long duration cam,and idles
900/950. With,5.8'' crank pulley,divided by 2.59 alt. pulley x 925 = 2071 alt.
speed at idle and a safer 15,675 at the 7k limiter.

 

90sickfox

Wasn't a pretty sight...and I've got big hands

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Jan 17, 2017

#10

• Jan 17, 2017

• #10

I used the pulley off of a 97 escort alternator...has worked very well for years. Not sure of the size. Its smaller than the stock 3g pulley.

 

Mustang5L5

That is…until I whipped out my Bissell

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Jan 17, 2017

#11

• Jan 17, 2017

• #11

Gear grabber said:

Thanks,i have seen that. The link says 79-93 (2g)
Will that work on a 3g ?

Click to expand...

Only difference is the length of the snout on the pulley that slips over the shaft. The 3G ones are a bit longer, so if you put a 2G pulley on a 3G alt, it will hit the case and not spin.

The solution? a 5/8" washer. Slide it over the shaft, and then put the pulley on, and problem solved.

https://www.autospecialties.com/ford.html

Bottom of the page. Not Aluminum though

I've had the 1 7/8" pulley on my 3G with a washer for years.

 

Last edited: Jan 17, 2017

Chuckman

GTFO you fat, heavy bastard

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Jan 17, 2017

#12

• Jan 17, 2017

• #12

i just use the stock 3g pulley, no problems.