alternator rating

hey guys, i have a 97 GTP and i had a question about the alternator rating. as you probably know the alt is labeled to make 105 amps. i was wondering if this is at idle or at its peak power. also since my car has nearly 90k is there a chance that its not making that kinda amps? thanks

No, the amp will not peak 105 amps at idle. Thats why your lights dim slightly when you come to a stop. Right around 2000rpms should be a good point to test alternator output.

And yes it is possible to not be near 105 anymore depending on the condition of the stator and rotor windings.

mine was not producing 105 max on my 99' gt...i upgraded to the big 3 (ground to chassis ground to block and alt to battery) all to 1/0 awg then i reached 105...wasnt what i needed so i upgraded to a 250. If your lookin to buy a new one and want a bigger one for cheap just let me know

ya i did 4 gauge for the big 3 and it helped a little. i was lookin to get a new alternator or have mine rebuilt and beefed up by my friends dad who builds custom alternators. idn if he has parts for my alternator tho so i might end up buyin one. i was lookin at the 200 amp alt on ebay for around $220 with shipping i think.