I had my car on the dyno yesterday and one of the guys noticed something that didnt seem right. At around 4K rpm my voltage starts to go through the floor. At 6100 my voltage it is down to 12.2vdc. At 5300 you can really see the effects on the dyno as power falls off.

Is this an alternator problem? I have quite a few things that put an additional strain on the alternator, EWP, guages, Mallory 685, 2 small stereo amps. I have also removed quite a few things that draw power as well. EBCM, ABS, CC, etc. Have I exceeded my stock alt? How many have had to upgrade their alternator for reasons other than stereo equip?

I have had the battery and the alternator checked at advance auto and the voltage is good up to about 4K rpm but they only check to 2k