I've done this, and after about 2-3,000 miles I've never seen anything above 14.7v. I did notice the windows rolling down\up a bit quicker, and my heated seat warms up a bit faster, but that's about it. My stereo still dims the lights a little and the voltage still drops under heavy loads (all 4 windows rolling down, heated seat on high, rear defrost on, etc.) That's to be expected though, the voltage booster mod doesn't increase the amperage, only the voltage. I have 2 AWG wire from the alt to the relay center and a 2 AWG ground going straight to the alt, along with about an 8 inch 2 AG wire form the battery to the stock ground (sanded to bare metal, of course). So I think I've reached the max potential of this alternator. Eventually I'll upgrade this alternator, or buy one that is already upgraded.