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1-wire GM alternator on a Big Block #804567
09/18/10 05:53 AM
09/18/10 05:53 AM
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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AlexP Offline OP
I Live Here
AlexP  Offline OP
I Live Here
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
I'd like to throw my 60amp roundback over a fence and put a GM alternator on the car.

Please don't get into the semantics of it all, its the last piece of mopar wiring/electronics on the car.

I've got the repop brackets from 440Source, and I'd like to have the simplest install of a Delco 1 wire style alternator I could possibly have.

I'm pushing a 6AL, Electric fuel pump, Hella H4/H1's and a decent stereo.

What do I need ?


My Build thread: Let the hemi swap begin!

1968 wanna be pro touring whatchamacallit with some fancy stuff and a new roof skin.
Re: 1-wire GM alternator on a Big Block [Re: AlexP] #804568
09/18/10 10:19 AM
09/18/10 10:19 AM
Joined: Jan 2007
Posts: 7,664
IN
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ahy Offline
master
ahy  Offline
master
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Joined: Jan 2007
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IN
The "small case" Delco alternator had factory ratings from roughly 60 to 100 A. Powermaster makes a 140A version. With your setup, I'd suggest 100 or 140 A.

I believe there is a post in the archives on good model references for rebuilt stock alternators from the parts stores. The 140A Powermaster unit from Summit or others would be a good choice also.

One consideration... the Delco can fit std MOPAR brackets but the back is a real tight fit with the heads. I got one for an Ed headed B engine and it was a no go. I had to return it. Stock iron heads have a little more room. Spacers - say around 1/4" - for the alternator, crank pulley, WP pulley and any other accessories may be needed.

Re: 1-wire GM alternator on a Big Block [Re: AlexP] #804569
09/18/10 05:47 PM
09/18/10 05:47 PM
Joined: Sep 2009
Posts: 1,805
ky hills
thehemikid Offline
top fuel
thehemikid  Offline
top fuel

Joined: Sep 2009
Posts: 1,805
ky hills
...I may be wrong, but I thought some body out there makes a 1 wire Chrysler Alt but also I don't remember the amp outputs either.

Re: 1-wire GM alternator on a Big Block [Re: thehemikid] #804570
09/18/10 07:32 PM
09/18/10 07:32 PM
Joined: Jan 2007
Posts: 7,664
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ahy Offline
master
ahy  Offline
master
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Joined: Jan 2007
Posts: 7,664
IN
Powermaster makes a 75 amp one wire version. It puts out 50 amps at idle. I believe Mancini, Summit, Bouchillon and others sell it.

Re: 1-wire GM alternator on a Big Block [Re: thehemikid] #804571
09/18/10 07:32 PM
09/18/10 07:32 PM
Joined: Jan 2003
Posts: 5,906
Athens, Greece
Pyper70 Offline
master
Pyper70  Offline
master

Joined: Jan 2003
Posts: 5,906
Athens, Greece
Atta boy Alex.....coming to the dark side....I run a single wire to a fuse and then the battery. Easy peasy. No external voltage regulator, nothing...My BB has the Small block alternator adjustable arm underneath and bolts directly into the head on the top. All you need is to hook up the "sense" cable.

Diagram here



Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
Re: 1-wire GM alternator on a Big Block [Re: AlexP] #804572
09/18/10 09:53 PM
09/18/10 09:53 PM
Joined: Aug 2003
Posts: 684
Milwaukee
ToddP Offline
super street
ToddP  Offline
super street

Joined: Aug 2003
Posts: 684
Milwaukee
I run a gm powermaster 140.

2 stereo amps, 250 mallory fuel pump 2, 10 inch fans, and hid headlamp transformers

basically a bolt on, but output terminal is close to the head (1/4 inch)

Thia alternator will put out 140 amps, the down side is it draws some hp.

I had a local rebuild guy put this alt on his test bench. he said about 8 to 10 hp to run.

With standard v groove pulleys it would eat belts.
Had to convert to serpintine pulleys.

If you need the power you need the power , but I would recomend a smaller output unit if you don't want to mess with the belts and pulleys.


Re: 1-wire GM alternator on a Big Block [Re: AlexP] #804573
09/19/10 10:37 AM
09/19/10 10:37 AM
Joined: Apr 2010
Posts: 236
Maryland
C
cudaboone Offline
enthusiast
cudaboone  Offline
enthusiast
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Joined: Apr 2010
Posts: 236
Maryland
I got my 1 wire mopar alternator 100amp from march performance.

Re: 1-wire GM alternator on a Big Block [Re: cudaboone] #804574
09/19/10 10:47 AM
09/19/10 10:47 AM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
http://chucker54.stores.yahoo.net/chromal.html
one and 3 wire types

Powermaster Street Alternator
Alternator, Internal Regulator, 75 Amp, Natural, Chrysler/ Dodge/ Plymouth, Big/Small Block, V8
$146.95
PWM74191

Re: 1-wire GM alternator on a Big Block [Re: Dodgem] #804575
10/14/10 08:47 PM
10/14/10 08:47 PM
Joined: Sep 2003
Posts: 10,645
Houston, Tx
A
AlexP Offline OP
I Live Here
AlexP  Offline OP
I Live Here
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
If I was to just get a parts house alternator, what year and such would I ask for ?

What makes the power master alternators have "little or no modification" needed ?


My Build thread: Let the hemi swap begin!

1968 wanna be pro touring whatchamacallit with some fancy stuff and a new roof skin.






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