Skip to main content
Topic: 3G alternator/electric fan upgrade (Read 3729 times) previous topic - next topic

3G alternator/electric fan upgrade

Well I am in the middle of gathering parts for a 3G alternator and electric fan upgrade. Ive done some research and these are the parts Im gonna go with for now. I already bought a 3.8 Lincoln fan for pretty cheap.

-New 94-95 Mustang 3G 130A alternator(~$130 with discount from Advanced-lifetime warranty)
-4G wire from alternator to starter sellonoid
-150 A inline fuse
This link has a lot of good info, especially what to do with the existing black/orange wires.
http://www.geocities.com/smithmonte/Auto/3G_130A_Alternator_Upgrade.htm

Electric Fan:
-3.8 Lincoln 2 speed fan
-Hayden auto fan control(on at 195, off at 185)
-75 A Bosch relay(yes, these fans can pull in excess of 40A continuous!)
-Manual switch(to switch between auto, off, and always on)
-10G wire
This link also has alot of good info.
http://www.geocities.com/smithmonte/Auto/MarkVIII_Fan.htm

I am gathering parts now, and hope to have this done within a couple weeks. I will post the results.
1988 Tbird Stock bottom end 306, Windsor Jr's, Explorer intake, 125 shot.
Best ET: 12.11 Best MPH: 113.8 1/4 mile

Re: 3G alternator/electric fan upgrade

Reply #1
Well, take it from someone whose 3G alternator just died...avoid parts store alternators like the plague. Mine was from Pep Boys and it's 3 years old, which normally would be a little easier to understand. Except it's on the convertible...driven 6 months of the year, and not daily. It's putting out just over 12 volts. I have to take it back here soon, and see what the goobers behind the counter are going to do for me (yes, it's also lifetime). Thing is, a lifetime warranty is fine and all, but you will definitely use it if you buy the alternator from the Big 3 (Auto Zone, Pep Boys, Advance). NAPA would probably be a safer bet. I've got my eyes on a PA Performance alternator now.

Re: 3G alternator/electric fan upgrade

Reply #2
I looked at the PA performance alt, and they are pretty pricey at ~ $200+. I know, Im cheap.
1988 Tbird Stock bottom end 306, Windsor Jr's, Explorer intake, 125 shot.
Best ET: 12.11 Best MPH: 113.8 1/4 mile

Re: 3G alternator/electric fan upgrade

Reply #3
LOL! So was I at one time...until I learned lessons through the wallet. It's worth the extra money for a top-quality piece.

Re: 3G alternator/electric fan upgrade

Reply #4
I think it'd be easier to go to PA and get your shiznit once than to go back to the parts store time and time again replacing starters/alternators.  I'm on my second PMGR starter and I did the conversion in July.  On my third stock alternator.  I think I"ll save up and get stuff from PA Performance from now on.  Plus... they sell the stuff as a bolt-on kit with all the accessories.

Re: 3G alternator/electric fan upgrade

Reply #5
Quote from: Ifixyawata
I think it'd be easier to go to PA and get your shiznit once than to go back to the parts store time and time again replacing starters/alternators.  I'm on my second PMGR starter and I did the conversion in July.  On my third stock alternator.  I think I"ll save up and get stuff from PA Performance from now on.  Plus... they sell the stuff as a bolt-on kit with all the accessories.


All their "kit" really includes is a 4G wire, heat shrink tube, inline fuse, and connectors. I can get all of these parts for much cheaper than they sell it, trust me. Now if you dont feel like rounding up all the parts, then I agree just but the kit. HOwever, I have these parts laying around here, why not use them.

As far as the alternator, I agree you get what you pay for. In this case, Im not sure the extra $100 is justifiable. Of course thats just my opinion.
1988 Tbird Stock bottom end 306, Windsor Jr's, Explorer intake, 125 shot.
Best ET: 12.11 Best MPH: 113.8 1/4 mile

Re: 3G alternator/electric fan upgrade

Reply #6
Yeah, I re-thunk that comment regarding the "kit" after I posted.  Also, I can't attest to the quality of Autozone, etc 3G alt's, but I know I've roasted a few stock ones.

Re: 3G alternator/electric fan upgrade

Reply #7
Who on here has done any of these upgrades btw..
1988 Tbird Stock bottom end 306, Windsor Jr's, Explorer intake, 125 shot.
Best ET: 12.11 Best MPH: 113.8 1/4 mile

Re: 3G alternator/electric fan upgrade

Reply #8
My conversion was in 2001. The local stereo shop hooked me up with the circuit breaker, wiring and all connectors.

Click on the PA Performance link in my post above. You can upgrade to a 200-amp for what looks like the same price. That makes it $1/amp...the same as the Auto Zone one, sure, but $200 for 130 amps, or $200 for 200 amps: which one's the better deal? Money definitely has everything to do with everything on a car and I'm not saying, "Don't buy parts store alternators, they suck." I'm just saying, be prepared to return it more often if you do. It's quite a hassle. And with the bad luck I've had over the past 2 decades with Ford's electrical systems, I've definitely learned my lesson to always get good stuff.

Re: 3G alternator/electric fan upgrade

Reply #9
Quote from: EricCoolCats
My conversion was in 2001. The local stereo shop hooked me up with the circuit breaker, wiring and all connectors.

Click on the PA Performance link in my post above. You can upgrade to a 200-amp for what looks like the same price. That makes it $1/amp...the same as the Auto Zone one, sure, but $200 for 130 amps, or $200 for 200 amps: which one's the better deal? Money definitely has everything to do with everything on a car and I'm not saying, "Don't buy parts store alternators, they suck." I'm just saying, be prepared to return it more often if you do. It's quite a hassle. And with the bad luck I've had over the past 2 decades with Ford's electrical systems, I've definitely learned my lesson to always get good stuff.


Thx for the info Eric, Ive been looking at that page for awhile now, but I see $200 staring back at me and it hurts lol. The 200 A upgrade costs $289 when you select it. Who knows, I might splurge lol.
1988 Tbird Stock bottom end 306, Windsor Jr's, Explorer intake, 125 shot.
Best ET: 12.11 Best MPH: 113.8 1/4 mile

Re: 3G alternator/electric fan upgrade

Reply #10
Got kinda curious with this thread and did a bit o digging around summit racing's site, found a 140 amp alternator that would work for our cars (tho listed for mustang 5.0) by Powermaster for $156.95 (summit part #PWM-8-47140). Dunno if it's the entire kit, but if you were looking to buy the parts seperately, this would maybe be a good deal  :dunno: . Oh, if you wanted it chromed for asthetic's it's an extra $100.
Temporarily Foxless? Ride the Bull...

Re: 3G alternator/electric fan upgrade

Reply #11
Ive also looked at the powermaster alternator. This is actually the right part number.Powermaster 140 A  86-93 mustang
1988 Tbird Stock bottom end 306, Windsor Jr's, Explorer intake, 125 shot.
Best ET: 12.11 Best MPH: 113.8 1/4 mile

Re: 3G alternator/electric fan upgrade

Reply #12
Hmmm.... that shoulda shown up in my search? Oh well. I suppose either would work, tho it looks like yours is the kit version. Eh, I was close I suppose!
Temporarily Foxless? Ride the Bull...

Re: 3G alternator/electric fan upgrade

Reply #13
My 3G alternator conversion cost me about $12. I got a factory Ford alt from a Mustang for free, put new brushes in it ($4), new bearings ($6), new slip rings on the rotor ($2), and some 6-gauge wire that I pulled from a decommissioned cop car :sawzall:  Not only that, but the alternator guru at the shop I work at owed me a favour for doing a spyware flush on his home computer, so he assembled the slip ring onto the rotor for me and pressed the bearings in for free (it was him who provided me with the Mustang alt for free as well)!!!
 
Seriously, 3G alternators are extremely durable and usually very easy to repair when they go bad. If you get a factory Ford alt that has never been rebuilt, chances are a set of brushes will make it charge like new (and you don't even have to remove the ed thing from the car to change 'em!). If the regulator goes bad that's another thing that can be replaced in-car. The rebuilds, on the other hand, usually have had their factory rectifier replaced with an aftermarket unit, and it's those aftermarket rectifiers that go bad. When your alt starts undercharging or starts whining or moaning it usually means that it has a bad diode in the rectifier, meaning the alt has to come apart.
 
Chrome302, if you wanna do a cheap 3G swap that is quite reliable, just try to get a junkyard 94-95 5.0 Mustang unit. Chances are good it'll work fine when you get it, and if it breaks you likely only need brushes or a regulator, which are extremely cheap.
 
I've got a chronicle of my 3G upgrade here on the old board:
http://p089.ezboard.com/ffoxthunderbirdsfrm13.showMessage?topicID=123.topic
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Re: 3G alternator/electric fan upgrade

Reply #14
Quote from: Thunder Chicken
My 3G alternator conversion cost me $12.
 
Chrome302, if you wanna do a cheap 3G swap that is quite reliable, just try to get a junkyard 94-95 5.0 Mustang unit. Chances are good it'll work fine when you get it, and if it breaks you likely only need brushes or a regulator, which are extremely cheap.
 
I've got a chronicle of my 3G upgrade here on the old board:
http://p089.ezboard.com/ffoxthunderbirdsfrm13.showMessage?topicID=123.topic


12 bux heh?? Canadain??  thats cheap, bet thats like $3.54 US. Beats my $14 3G I bought off a 3.0 Taurus last year at U-wrench it. I opened mine and everything looked good, so I put it back together and installed it. Also ran a paraell wire to the battery terminal of the soloniod, so I won'y fry the original wiring.