[Piotrsko]

For starters, the spec used to be 14.8v for charging batteries in very cold weather. In theory therefore most electronics should tolerate that and more, but in reality it varies case by case. My glowplug relay which is solid state has a limit of 14.6 stamped on it and I know from experience replacing said relay that 14.7 fails the relay.

The starter will draw more current, spin faster and develop more hp (maybe now 3 1/2). The brushes will arc more and live shorter lives but that shouldn't be noticable. I overvolt my traction motor significantly and know of someone that has doubled his traction system voltages to 400 volts on a 48v rated motor. The trick will be isolating the other systems from the 16 volts and the bemf produced