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Got amps? GM Alternators! (pics and part#'s added)


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84 replies to this topic

#26 NorthWet

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Posted 19 December 2004 - 05:31 PM

Well, there was plenty of interest in this swap awhile ago. Has anybody else actually completed it yet?

So far, mines still doing great, with the stock harness, cause I'm a lazy bum. :cool:

I'm seriously thinking about it... just ran out of spare alternators. :rolleyes:

#27 subynut

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Posted 19 December 2004 - 10:43 PM

Hummmm that don't look too hard. Wonder if that alt will fit in mine. I still got the factory A/C in there. Really need more current. With both fans, the heater, headlights, fog loght, and stereo blasting, the volt meter bounces around 12V at 3000rpm to the beat of Barry Manilow. :-\

#28 monstaru

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Posted 19 December 2004 - 11:01 PM

i picked up the alternator, and wiring,got a weber.need to rebuild the weber,get an air filter for it, and the adapter plates .then it will be on.i was surprised to see the similarity of these two alts.i actually got mine from the yard for 8 bucks.it is a newer reconditioned unit.

#29 oddcomp

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Posted 20 December 2004 - 10:20 AM

my gm alt came off a old buick my grandma had .. last time that car drove was in like 90 something like 94 or erlier..
and it works fine

#30 NorthWet

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Posted 20 December 2004 - 11:59 AM

my gm alt came off a old buick my grandma had .. last time that car drove was in like 90 something like 94 or erlier..
and it works fine

Gee, I thought that you were gonna say that with MS&EDIS that you didn't need an alternator! ROFLMAO

#31 oddcomp

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Posted 20 December 2004 - 12:06 PM

no last i knew they did not hve any coe tha makes it function as a laternator based on teh return voltage from the crank sensor
but now that you mention it i will talk to teh code writing guy and asee what he can do
cool no alt = more free hp by god northwet your a genius
hehehehehehehehehe

#32 Snowman

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Posted 02 February 2005 - 02:19 AM

Well, I think my alt lost a diode, so I'll probably do this convesion soon. The voltage bounces a little when I'm idling with my lights on and the altenator is right at the max it can put out at that rpm.

If you run a larger wire straight to the battery from the alternator, you won't have to worry about the wiring harness. Nothing that draws power through the factory harness will draw any more with that alternator than it did before. Just be sure to run the power supplies for any add-ons straight to the battery too.

#33 austin

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Posted 02 February 2005 - 10:37 AM

X35, I've been watching this thread too, wondering about fitment on the XT6, which has the Serpentine belt also....


Huck, if this thing only puts out 100-105 amps, would it really be worth it to swap out our 90amp alternators? If so, I might consider it too. I guess 10-15 amps is better - and if it's an easy swap (especially considering our 6 rib serpentine belt).

#34 RavenTBK

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Posted 02 February 2005 - 12:31 PM

I'm about 90% done with the writeup for this. Been working on it in my "i'm too bored to do anything else" time. Just I dont get that bored that often. I'm guessing I'll move it up the priority list and crank it out a bit faster.

Ideally, you'd want to run a large gauge wire straight to the hot side of the battery. Unless you already have enough accessories that were taxing the stock harness, you can just as easily run it through the stock harness without major issue. Which is exactly what I continue to do. I plan on leavin it on the stock harness for as long as I can just to see what its limits are. I've been testing the limits of other devices already. I've melted two 30A relays while testing my 700watt headlights. :grin: I dont like to follow pre-set rules. I like to find my own limits. ;)

Even if you decide to install a large gauge straight to the battery, you can just tape off the stock connector and call it a day. The low draw of the current accssories can continue to pull from where its pulled from all along, as its draw will not increase just cause you've got a larger alternator on there. Just remember that any new, high draw accessories will need to be fed straight from the hot side.

Cheers. :drunk:

ps by the way, I'll run up and try to find out about fitting a 6 rib serpentine pulley sometime today. I've got 5 gadzillion things catching fire and blowing up all at once right now. The day is quickly going down the toilet. Posted Image

#35 RavenTBK

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Posted 05 February 2005 - 10:57 PM

Okay.. I forgot to check about that serpentine pulley.. I'll do it tomorrow, I swear! I've already written a post-it and stuck it to my bathroom mirror. When I wake up, I'll head into town and research it.

I did however get the writeup done. Once the mods finally approve it, you can click here to view it in the USRM.

#36 monstaru

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Posted 06 February 2005 - 12:22 AM

do you feel that this upgrade requires more grounding?this would be my only concern.oh, and pretty much any cadillac has this alt.

#37 RavenTBK

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Posted 06 February 2005 - 12:57 AM

As long as your current grounds are good, I dont see any need for anything additional above stock (unless you're already taxing your system with some serious accessories). At the same time, you can never have too much in the way of grounding. It wouldnt hurt a thing to beef it up a bit if you had the desire to do so. :)

#38 bushbasher

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Posted 06 February 2005 - 01:36 AM

More likely a bad ground than low output from your alternator.


as long as your battery is charged that shouldnt happen. Like edrach said, a bad ground, or maybe a dying alt and a weak battery. It doesnt take much to turn over a sube motor so batteries can continue to start the car even when they are next to toast.

#39 RavenTBK

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Posted 10 February 2005 - 10:27 PM

Heh.. either I'm paying waay too much attention to USMB, or not enough.

My local parts house had 5 different diameter 6 rib pulleys that could be swapped on. No part number, as they're just leftovers from other swaps.

So, yes, those with the XT6... yes there is a 6 rib serpentine pulley that can be swapped onto the alternator! Check your local parts house.

#40 starkiller

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Posted 10 February 2005 - 10:59 PM

so, anyone with an ea82 w/ac does this swap yet? :D

#41 starkiller

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Posted 11 February 2005 - 10:32 PM

nobody yet?

#42 sregor13

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Posted 25 March 2005 - 08:16 PM

I am with you on this one. I have AC on all my EA's. I am curious about how it will fit. I might just try it out soon, becasue i just lost my alternator in my 85 Subaru. Anyone else have AC and has done any kind of swap? Thanks

#43 Frank B

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Posted 05 June 2005 - 11:21 AM

Just looking for an update on installing one on an A/C car.......

#44 subynut

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Posted 05 June 2005 - 01:22 PM

so, anyone with an ea82 w/ac does this swap yet? :D



Still nobody?

#45 Numbchux

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Posted 05 June 2005 - 01:35 PM

Still nobody?


I'm looking very seriously into it...we'll see how it goes

#46 Mykeys Toy

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Posted 14 June 2005 - 07:40 AM

i contacted parts america and this is what they sent me.


Your Palladium P7157 alternator fits the following vehicles:

BUICK
1977 CENTURY
1977 ELECTRA
1978 LESABRE
CADILLAC
1980-1984 COMMERCIAL CHASSIS
1980-1984 DEVILLE
1980-1985 ELDORADO
1979-1985 FLEETWOOD
1980-1985 SEVILLE
CHEVROLET
1984-1985 P30 VAN
GMC
1984-1985 P35/P3500 VAN
OLDSMOBILE
1979 CUTLASS
1979 CUTLASS CALAIS
1979 CUTLASS CRUISER
1979 CUTLASS SUPREME


Mike

#47 kingbobdole

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Posted 14 June 2005 - 01:07 PM

Hey,
XT6 guy here... I was looking at this and there are a few corrections. First Austin said if its only 10 more amps then stock XT-6, then why do it? Well first its 40 more amps then stock, AND theres a kit to make it a 200Amp BEAST! I'll repost this here:
http://fordfuelinjec.../index.php?p=67
Secondly if you look at that site they also provide pulleys that are twin V, AND 6 groove serp style pulleys in different sizes with a little math thing to do to get the right one. Next Time I'm at a yard I'll check it out and bring some of this to the XT-6 side of things if I do it. I hate turning in the cold night and running out of power steering. I think the extra 40 amps would do wonders. Plus I wonder if it would be easier to rid my car of the AC

#48 RavenTBK

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Posted 14 June 2005 - 11:51 PM

i contacted parts america and this is what they sent me.

Awesome! An actual list. I am going to swipe it and add it to the writeup, with a "thanks to" of course. ;)


<snip all he said above>

Its funny you should post a link to fordfuelinjection.com. Ryan is one of my friends from fullsizebronco.com. To all of you, consider this another shameless plug for Ryan's site. He sells some good stuff. :headbang:

#49 soobmater

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Posted 15 June 2005 - 02:27 AM

so nobody thats did a swap with a/c yet huh? im startin to look into this.(espically if i get a winch)

#50 Tin Soldier

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Posted 15 June 2005 - 08:57 AM

What kinda AC are we talking about?

My loyale would accept it just fine since the alt mounts on the outside of the braket, but my 87 dl mounted on the inside of the bracket and the ac on the outside so that might cause a problem.




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