I am currently replacing my fuel system in my cobra from a dual return to a triple return. I also have an aftermarket stereo in the car. Between the two, I try to be conscious of voltage throughout the rpm cycle (dont want to lose any pumps). I have the stereo completely out and am currently logging voltage drops through my handheld tuner. Normal total voltage is running in the 13-13.5 range. However at low rpm with either lights on or a/c on the voltage drops into upper 11s to 12s. It then goes back up to mid 13s as I accelerate. The alternator seems to be charging at 14.3-14.4 consistently. Just curious as to if this drop is too low and could cause me fueling issues. When the stereo is re-installed, a capacitor and second battery are being installed with it. Just wondering if I will have problems once the 3rd pump is installed because of this low voltage? Just as an aside, I can now hear my pumps running all the time. Maybe I just never noticed it before since normally the back seat is up. I can hear a whine that increases and decreases with the voltage, thus the concern over not enough power.:shrug:
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