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Does anyone know the specs on a 05 gto alternator(amps,ect...). I need a new one for my 05 and i dont' really feel like spending 500 for a alternator. I was thinking if i could find the insides of one that produces the same amout of power i can just switch chases and change the plug in on it. If anyone knows a cheaper way to do this let me know, i have looked everywhere for a used one but no one sells it used because no one parts out the engines.
 

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Description and Operation

CHARGING SYSTEM DESCRIPTION AND OPERATION

GENERATOR
The GEN IV V8 engine is fitted with a Mitsubishi 140 amp generator. This generator is mounted on the lower, left-hand side of the engine. It has an internally mounted regulator, a single lower mounting lug and no external cooling fans.

The generator is 3 phase, incorporating a rotor with 6 pole pairs and 2 (internal) cooling fans, one on the drive end and one on the slip-ring end. The rotor is supported by ball bearing races in both the drive and slip-ring end housings. The stator surrounds the rotor and has a 3-phase delta connected output winding on a ring shaped lamination pack.

The output of the stator winding is rectified by 6 diodes within the slip-ring end housing. Excitation current is supplied to the rotor field coil via the voltage regulator, the brushes and slip-rings. The electronic voltage regulator requires no adjustment in service.

The generator has 2 external connections:


B+ lead to the battery positive terminal
L lead to the 3k ohm resistor (50mA max )
Ground connection (via the installation bolts)
CIRCUIT DESCRIPTION
With the ignition switched ON, current is supplied via resistance to the L terminal of the regulator with a maximum sinking current of 50mA. This allows current to flow (within the regulator) from the generator B+ terminal to the brushes and rotor winding.

The current in the rotor winding creates magnetic fields between adjacent rotor poles. As the rotor spins, the stator windings cut through this field at right angles and induce voltage. As the speed increases, this induced voltage increases. Current then flows through the 3-phase diode bridge in the rectifier to convert the AC voltage to DC. This is supplied to the B+ output and then to the battery.

The regulator B terminal monitors the system voltage. When this voltage reconnects approximately 14.5 volts , the regulator opens the circuit through the rotor winding, causing the generator output voltage to drop. When the regulator senses a voltage below a preset value, of the B Terminal, the regulator closes the circuit through the rotor winding and voltage to the battery again increases. This cycle repeats very rapidly.

Current does not flow through the rotor winding when the engine is cranking.

WARNING LAMP CONDITIONS
The regulator L terminal remains low when it detects a fault condition in the generator or the external circuits. The terminal remains low until all faults are repaired.

Fault conditions include:


Open circuit or excessive voltage drop in the B+ cable
Open circuit in the generator phase connection
Overcharge of the battery
Short circuit in the regulator output stage
Open circuit in the rotor winding
Poor contact between the rectifier and the regulator
Poor contact between the battery terminals and cables
 

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Thank you Holden!!!
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Not likely you will find something like that. Best bet is to find a local rebuilder to do the work for you. It is always cheaper and better to have a good rebuilder go through it than a reman from a parts store, etc. My uncle runs a small shop specializing in this.
 

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smurfin' fly-by...
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Why not just go with an aftermarket alternator with a bit more power for later modifications? There have to be some out for the LS2 by now, especially with all the Corvettes and CTS-V's rolling around as well.
 

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I found 250 amp chrome alt. on e-bay ,new for under $500.00 and not chromed $100.00 less.
 

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Hershball said:
Does anyone know the specs on a 05 gto alternator(amps,ect...). I need a new one for my 05 and i dont' really feel like spending 500 for a alternator. I was thinking if i could find the insides of one that produces the same amout of power i can just switch chases and change the plug in on it. If anyone knows a cheaper way to do this let me know, i have looked everywhere for a used one but no one sells it used because no one parts out the engines.
You out of warrenty already? Or did you smoke it yourself and they won't warrenty it?
 

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ls6gto said:
Why not just go with an aftermarket alternator with a bit more power for later modifications? There have to be some out for the LS2 by now, especially with all the Corvettes and CTS-V's rolling around as well.
Corvette alternator is whole different ballgame, not sure about the CTS-V.
 

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Chef Ron said:
I found 250 amp chrome alt. on e-bay ,new for under $500.00 and not chromed $100.00 less.
Must be the chrome added the extra 110 amps.
 

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Discussion Starter #9
I smoked it myself and they won't replace it. Where in gods name did you find one for under a 100 dallors
 

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Try Fred Beans Pontiac- they sell at around 10% over cost, so their prices will be MUCH better than a local dealer.
Joe
 

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OUCH- that is the discounted price, list is $900 :eek: :eek: FOR AN ALTERNATOR????
 

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Yeah, tell me about it!!
 

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Sort of off-topic, but does anyone else find it strange that GM went with Mitsubishi starters and alternators on these cars? Not slamming Mitsu electronics - they're pretty darned good actually (especially the stuff that comes out of their automation division). I just think it's a little odd that GM chose them over Delphi for our cars...:confused:
 

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given delphis recent troubles, is it really *that* surprising?
 

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Steel Chicken said:
given delphis recent troubles, is it really *that* surprising?
Touché. :judge:
 

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Can you find a Mitsubishi part number on it anywhere? If so post it up and I'll see what I can find out on pricing.
 

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smurfin' fly-by...
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What is the stock alternator amperage anyways? It seems no auto parts sites have any information regarding replacements for 2005+ Vette and 2005-06 GTO...
 
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