3g alternator conversion pulley swap?

strtrcr50

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Jun 21, 2006

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Previously from Dirty Jerzey exit 7a

Oct 8, 2009

#1

• Oct 8, 2009

• #1

Is it recommended to swap pulleys from the 2g to the 3g when doing the conversion? I used a 94-95 mustang gt 130 amp alternator.

 

Shaolin Crane

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Oct 6, 2008

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Kommiefornia

Oct 8, 2009

#2

• Oct 8, 2009

• #2

strtrcr50 said:

Is it recommended to swap pulleys from the 2g to the 3g when doing the conversion? I used a 94-95 mustang gt 130 amp alternator.

Click to expand...

i was under the impression that it would spin slower with non fox pulley so i changed my 3g to the fox one to keep the power closer to idle

 

strtrcr50

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Jun 21, 2006

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Previously from Dirty Jerzey exit 7a

Oct 8, 2009

#3

• Oct 8, 2009

• #3

Shaolin Crane said:

i was under the impression that it would spin slower with non fox pulley so i changed my 3g to the fox one to keep the power closer to idle

Click to expand...

It is definitely a bigger pulley on the 3g. The idler sits higher. The only thing I notice is that I have a slight flicker on the voltmeter at idle. Are you sure you aren't overspinning it with the smaller pulley though? I still have my core, so I can switch pulleys if it is a good idea..

 

Shaolin Crane

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Oct 8, 2009

#4

• Oct 8, 2009

• #4

strtrcr50 said:

It is definitely a bigger pulley on the 3g. The idler sits higher. The only thing I notice is that I have a slight flicker on the voltmeter at idle. Are you sure you aren't overspinning it with the smaller pulley though? I still have my core, so I can switch pulleys if it is a good idea..

Click to expand...

almost positive im not, and even if it is doing it a bit the 3g has a WAY better regulator than the 2g so either way im not worried about it

 

strtrcr50

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Jun 21, 2006

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Previously from Dirty Jerzey exit 7a

Oct 8, 2009

#5

• Oct 8, 2009

• #5

Maybe I'll go over to my buddy's house where I store my tools and fire up the compressor. I'm not trying to change pullies without an impact gun. Not like it will take me long to switch back if I didn't like it.

 

Shaolin Crane

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Oct 6, 2008

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Oct 8, 2009

#6

• Oct 8, 2009

• #6

strtrcr50 said:

Maybe I'll go over to my buddy's house where I store my tools and fire up the compressor. I'm not trying to change pullies without an impact gun. Not like it will take me long to switch back if I didn't like it.

Click to expand...

yup took me all of about 5 seconds to change out the pullies

 

strtrcr50

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Jun 21, 2006

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Previously from Dirty Jerzey exit 7a

Oct 8, 2009

#7

• Oct 8, 2009

• #7

It kills me. Most of the time when I'm doing day to day maintenance on either of our cars, I use a set of harbor freight tools because they are at my house. If I go 15 mins to my friend's house, I have all snap on/mac tools with a big compressor(All the stuff from when I was a 10 yr mitsu tech) My wife wonders why I pay so much attention to the garage when we look at houses. She caught me at one house trying to figure out if I could get a lift in there. And if it is at all possible, I will have a lift again. You get spoiled when you have a huge compressor and a lift.

 

strtrcr50

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Jun 21, 2006

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Previously from Dirty Jerzey exit 7a

Oct 8, 2009

#8

• Oct 8, 2009

• #8

FWIW, it would have been nice to have a compressor and my cutoff wheel while doing this alternator swap. Instead, I was out there with a rasp, grinding down the alternator bracket by hand.
What doesn't kill me makes me stronger I guess.

 

Shaolin Crane

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Oct 6, 2008

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Oct 8, 2009

#9

• Oct 8, 2009

• #9

wow yeah i couldnt imagine doing anything ive done without my shop, and you're right all the places ive been looking at ive been wondering if i can get a lift in there as well, i will have one...

 

strtrcr50

New Member

Jun 21, 2006

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Previously from Dirty Jerzey exit 7a

Oct 8, 2009

#10

• Oct 8, 2009

• #10

I'm waiting to get a house till the economy finishes crashing. I have quite a bit of money set aside.
And yes you can. If you had to get it done to get to where you had to, it'd happen.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Oct 8, 2009

#11

• Oct 8, 2009

• #11

Easy way to find out if you need to swap. Start car, drive around until you get the car HOT (heat causes voltage drop due to higher reistance), then get out and measure voltage at idle with a multimeter.

Then turn on your accessories and measure again. Anything over 12V is still charging, under that and you are draining.

 

67coupe

Founding Member

Apr 5, 2002

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Huntsville, AL

Oct 9, 2009

#12

• Oct 9, 2009

• #12

I'm using the stock 2g pulley on my 3g with u/d crank and w/p pulleys. No problems charging with taurus fan on high speed via DCC.

A friend is using the stock 3g pulley with same u/d's, fan, and controller setup. Also, no problems. Both cars are daily drivers and maintain well over 12.7 volts at idle with all acc on.

Be sure to add a heavy gauge block to chassis ground wire!