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Alternator Rating?

goodguy8705

goodguy8705

New member
I've asked multiple places and have received three different answers so I figured I'd keep asking until someone is sure.

I have a 2005 Grand Prix with a non supercharged 3800.

Can anyone tell me what the rating is on the alternator and if possible, both the max and idle?

I'm trying to find out if its necessary to upgrade to a high-output alternator to power my amplifiers or not.

Thanks in advance.
 


I dont know what the idle rating is, but max rating is 105 amps. I think only the Bonneville, maybe the Regal had 125 amp alternators.
 
Could very well be, I don't really know outside of W-Bodies.

goodguy, if you want more info, do a search for CS130D. That's the model of alternator we use; I dug up a bunch of into a while ago, but I can't find my bookmarks anymore.
 


Can someone point me to somewhere I can find a 200 amp alternator that will bolt on without any adapters, or new belts?

I don't think the stock one is going to handle 1150 watts rms.
 
Sabrewings said:
105 * 14.4 = 1512 watts peak. Between your stereo and your other systems, it would be close.
Click to expand...

That's fine when I'm driving down the street, but I'm going to be pushing 1150w rms so when the car hits idle, it's going to seriously strain the stock electrical system since it will more than likely only be producing 60-70 amps.

I've looked at places that sell high output alternators, but can't find anything that fit my specific application.

Can someone link me to some options that will fit my vehicle for sure?
 


i get light dim at idle pushing a 400W Hifonics amp @ 4ohms, so 1150WRMS is definatly going to stress the stock system, especially at idle
 
Check the rpo codes around your trunk lid and it should tell you what you have...

KG7
Generator 125 AMP

K68
Generator, 105-Amp


My 04 has the 125 amp.
 
and you can easily run 1200 on our our stock electrical if its the 125 i ran 1200 on a 105 alt when i had my monte carlo and it didnt hurt anything im actually running an rd audio 1750 right now
 
you can run it, its more a matter of how much voltage drop your going to get, and the fact that your most likely only getting 40-60 amps at idle, hence light dimming at when idling/low rpms
 


well you get more than 60 at idle close to atleast 100 cuz i dont get much dimming if any at all at idle even when i do run full tilt at im doing closer to the 1900 watt mark so 1150 wont do much of anything ull be fine
 
There's no way it's able to output 100 amps at idle. I wouldn't expect that out of any alternator rated at less than 200 peak.
 
close to not 100 more towards the 90 and you will be fine anyways as i was saying i run alot more than that and the most ive seen it drop to was 12.5 and then i just turn it down
 
05gpgt said:
well you get more than 60 at idle close to atleast 100 cuz i dont get much dimming if any at all at idle even when i do run full tilt at im doing closer to the 1900 watt mark so 1150 wont do much of anything ull be fine
Click to expand...


you are not running 1900W RMS on a stock charging system without massive amounts of dimming.

With an optimal charging system [15V] your pulling about 126A... theres NO WAY your running that and dont have issues with diming, or worse.
 
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