late model alternator

66 BLAKE 96 · Dec 6, 2004

What are my choices when going with a latemodel alternator? I'm installing an '85 5.0 and keeping the serpentine setup. Since I need a new alternator anyway, which should I go with? One-wire, stock '85, 3G (likely out of my price range, but I still want to know what's out there).

Any wiring advice or links you may have would be great.

gp001 · Dec 6, 2004

This might help ya there Blake. I don't remember where I got it or I would credit the originator

66 BLAKE 96 · Dec 6, 2004

Sweet! That's a handy little fella right there. Thanks gp!

fast Ed · Dec 6, 2004

I'll say thanks as well.

I have a good used 3G from a 95 Mustang, which I'd like to install on my 68 Cougar ... need some more juice for the electric fan I'm hoping to go with.

cheers,
Ed N.

88 Fox GT · Dec 6, 2004

Umm, Blake, a 1985 alternator would be a 2G not a 3G, correct?

I have a 3G on my '65, and it's hooked up very similar to the pic that gp posted.
Except, the Yellow/White wire doesn't need to go to the solenoid. It can go right from the plug-in, to the stud where the charge wire on the alternator is attached. Doesn't really matter where you put it, I just think it would be easier with it mounted to that stud on the alternator.

You can get the 175A fuse at any auto parts store for about $12.

This thing should have PLENTY of power too. I was reading that at IDLE the 3G cranks out 80 amps (up to 150 amps MAX) compared to the stock alternator which can make 40-65 MAX.

Ronstang · Dec 6, 2004

See Blake....I told you someone on the board could provide a schematic in no time.

Fostang · Dec 7, 2004

ok so once you have this installed how do you elimnate the original voltage regulator?

Darkhorse845 · Dec 7, 2004

66 BLAKE 96 · Dec 7, 2004

Ronstang said:
See Blake....I told you someone on the board could provide a schematic in no time.

Heheh, yes you did Ron.

Thanks again for all the info everybody. Looks like I might get to go pickin' through the bone yard for a 3G.

MrBobMarley · Dec 7, 2004

Fostang said:
ok so once you have this installed how do you elimnate the original voltage regulator?

I would also like to know this. Still working on my conversion too.

88 Fox GT · Dec 7, 2004

Fostang said:
ok so once you have this installed how do you elimnate the original voltage regulator?

Unlpug it and remove the wires?

allcarfan · Dec 7, 2004

You can get a re'spool' kit for an externally regulated ford Alternator for about $40. It will turn make your stock alternator put out 105a. As for a stock 85 alternator...trash it or have it rebuilt and beefed up. They are pretty weak.

Fostang · Dec 7, 2004

Speed_Demon1965 said:
Unlpug it and remove the wires?

No sir.

88 Fox GT · Dec 7, 2004

Fostang said:
No sir.

I'm not sure what you mean then, Fostang. You want to REMOVE the stock voltage regulator, correct? If so, I would say take the voltage regulator off and remove the wires. The 3G is internally regulated. With my EFI harness, I have a connector that connects the alternator straight into the harness with one wire. I don't know why the voltage regulator part in the 3G would require a special way for it to be hooked up.

fst68pony · Dec 11, 2004

On the early cars just unplug your original alt. wire harness. You can leave your original voltage regulator hooked up to the engine compartment main harness and it wont ever know the difference. I do it this way so it still looks stock plus if I ever got into a jam and the parts house does not have G3 then I can just plug the stock G1 style alternator and harness back on the car and drive off. I started swapping these in about 1998 and I love the G3.

I also have built up the G1 's with both a 75 and 100 amp kits the problem with this is as you increase the overall output you loose the output at idle.
What I mean is that the upgraded G1 will have a little less output at idle then it had before the upgrade. The G3 the best output at idle between 80-90 amps!

I have a 70 bronco, 68 mustang and 90 mustang all running G3's, and one life time warrantee covers all three vehicles YEA!

68rustang · Dec 12, 2004

How do you identify a "3G" alternator?

88 Fox GT · Dec 12, 2004

It's a Ford alternator with internal cooling fins. About from 1994-1995. That's what it was on the Mustangs anyway.

bnickel · Dec 12, 2004

i'm planning on using the 2g on mine, because i like the more stock look of it as compared to the 3g, especially if it is clocked righht so that all the wiring connectors are on the bottom side and out of sight for the most part

68rustang · Dec 12, 2004

Speed_Demon1965 said:
It's a Ford alternator with internal cooling fins. About from 1994-1995. That's what it was on the Mustangs anyway.

So the alternator I have sitting on the bench from the 95 GT I have been parting out is a good one to hold on to?

88 Fox GT · Dec 12, 2004

68rustang said:
So the alternator I have sitting on the bench from the 95 GT I have been parting out is a good one to hold on to?

Yes, it is a 3G.

late model alternator

66 BLAKE 96

Native Texican

gp001

66 BLAKE 96

Native Texican

fast Ed

New Member

88 Fox GT

Active Member

Ronstang

New Member

Fostang

Darkhorse845

Banned

66 BLAKE 96

Native Texican

MrBobMarley

88 Fox GT

Active Member

allcarfan

The Answer Man

Fostang

88 Fox GT

Active Member

fst68pony

New Member

68rustang

Active Member

88 Fox GT

Active Member

bnickel

68rustang

Active Member

88 Fox GT

Active Member

Similar threads

late model alternator

Native Texican

Native Texican

New Member

Active Member

New Member

Banned

Native Texican

Active Member

The Answer Man

Active Member

New Member

Active Member

Active Member

Active Member

Active Member

Similar threads

Privacy & Transparency

Privacy & Transparency