3g alternator install... walk through?

SadbutTrue

Founding Member

May 1, 2002

2,390

4

49

Granada Hills, California

Jun 26, 2011

#1

• Jun 26, 2011

• #1

I have a 3g alternator to install in my 66 (351w). My old alternator and belts are going, and its needed for an eventual stereo swap. That said, i've never even done an alternator swap on my own so need some clear directions

Thanks.

 

horseballz

10 Year Member

Sep 30, 2009

824

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49

Las Vegas, NV

Jun 26, 2011

#2

• Jun 26, 2011

• #2

I too would be interested in some clear, detailed instructions, including the options for eliminating the original voltage regulator without needing to make a new under hood wiring harness.
TIA,
Gene

 

SadbutTrue

Founding Member

May 1, 2002

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Granada Hills, California

Jun 26, 2011

#3

• Jun 26, 2011

• #3

old alternators out.. now what?

 

Loup-garou

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Aug 11, 2001

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New Orleans, LA

Jun 26, 2011

#4

• Jun 26, 2011

• #4

 

SadbutTrue

Founding Member

May 1, 2002

2,390

4

49

Granada Hills, California

Jun 26, 2011

#5

• Jun 26, 2011

• #5

what parts do I need other than the alternator itself?

any details on the 'voltage regulator delete' that was mentioned above?

I noticed some mentinos of a 175amp mega fuse... where do I get that? do I need it?

 

Loup-garou

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Aug 11, 2001

337

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New Orleans, LA

Jun 28, 2011

#6

• Jun 28, 2011

• #6

Check out pa-performance.com; 3G Upgrade Kit (Retains Stock Wiring) part #462802C. They also sell the mega-fuses shown in the above diagram, as well as other bits and pieces.

 

NMEMJCM

Member

Nov 10, 2009

83

2

6

Long Beach CA

Jun 28, 2011

#7

• Jun 28, 2011

• #7

Yep, check out the link above. They will set you up with everything you need. It is very easy with their pigtailes and instructions. Call them, they had me rollin in a few hours of work after I bought their kit. sooo easy.

 

SadbutTrue

Founding Member

May 1, 2002

2,390

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49

Granada Hills, California

Jun 28, 2011

#8

• Jun 28, 2011

• #8

sweet i'll give them a call in a bit and report back

 

sdmustangrider

New Member

Sep 24, 2009

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1

San Diego

Jul 3, 2011

#9

• Jul 3, 2011

• #9

Did you ever get this solved? Sorry it's been a while. I'm usually on AFM or Vintage. I got the single wire 150 amp alternator and it's done SUPER. I had 2 amps, one for sub and amp for interior speakers and it's been great to me. Email me if you haven't done this and I can tell you what to get. dave5south@cox.net

 

SadbutTrue

Founding Member

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Granada Hills, California

Jul 17, 2011

#10

• Jul 17, 2011

• #10

nm - see next post

 

SadbutTrue

Founding Member

May 1, 2002

2,390

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49

Granada Hills, California

Jul 18, 2011

#11

• Jul 18, 2011

• #11

just got the fuse and box for it from PA performance, so that hsouldn't be an issue.

however, what did you guys do about the pulley? i had been planning on taking the old pully off the original-style alternator, but it doesn't fit the 3g. can i use the 3g's pulley (if so, will i need a different belt)? do I need an adapter of some kind?

 

sdmustangrider

New Member

Sep 24, 2009

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San Diego

Jul 18, 2011

#12

• Jul 18, 2011

• #12

I've never heard of the pulley not fitting. My pulley was able to fit to my 3g alternator with no issues. I ended up having to change the belt to a 1 inch longer belt to reach the pulley.

 

SadbutTrue

Founding Member

May 1, 2002

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Granada Hills, California

Jul 18, 2011

#13

• Jul 18, 2011

• #13

sdmustangrider said:

I've never heard of the pulley not fitting. My pulley was able to fit to my 3g alternator with no issues. I ended up having to change the belt to a 1 inch longer belt to reach the pulley.

Click to expand...

What my dad said in the email this morning (he had taken it home to edit some battery wires and to take the pulley off with his impact wrench):

" Did Steve tell you that I took the pulleys off and they are not interchangeable – the shaft on the older versions is longer and very slightly different diameter."

 

sdmustangrider

New Member

Sep 24, 2009

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San Diego

Jul 18, 2011

#14

• Jul 18, 2011

• #14

I don't know what to tell you. Mine was able to swap. Maybe someone else had an experience like you did.

 

Loup-garou

Founding Member

Aug 11, 2001

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New Orleans, LA

Jul 19, 2011

#15

• Jul 19, 2011

• #15

SadbutTrue said:

(snip)
"...the shaft on the older versions is longer and very slightly different diameter."

Click to expand...

Well, the shaft on the 1G alternator is longer - the external fan has to fit there. I've never compared the shaft diameters of the two styles, but I'd venture a guess that the 3G is a metric size.

Are you staying with v-belts? If so, look at the March 4" 1V pulley for the 3G alternator - the larger diameter helps prevent belt slipping/squeal. Or you can use a two-sheave pulley and twin v-belts.

BTW, PA-Performance sells pulleys too. Call them and ask about your application.

 

SadbutTrue

Founding Member

May 1, 2002

2,390

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49

Granada Hills, California

Jul 24, 2011

#16

• Jul 24, 2011

• #16

well, got her in. we were able to get the shaft to work with some massaging. PA performance's mega fuse and regulator eliminator kits helped too.

thanks!

 

6

67rcks

Member

Feb 20, 2008

373

0

17

Oct 28, 2011

#17

• Oct 28, 2011

• #17

The above wiring scheme seems strange.

Why is the sensing wire (yellow) placed behind the fuse?

If the megafuse burns, yellow wire will pick 12.x V and provide full load to alternator's field, eventually destroying it - as the alternator's aoutput will be disconnected from the battery!

 

skywalker

Member

Dec 22, 2003

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16

Pensacola, FL

Oct 28, 2011

#18

• Oct 28, 2011

• #18

Loup-garou said:

Check out pa-performance.com; 3G Upgrade Kit (Retains Stock Wiring) part #462802C. They also sell the mega-fuses shown in the above diagram, as well as other bits and pieces.

Click to expand...

I used this. Great stuff.