Well my 320A alternator doesn't put out enough at idle, and holding the gas pedal down all the time while giving out demos gets to be a bore. So searching around, I found something that might be of interest!
On the YotaTech forums, they do this "ECT Mod" for slightly more power. ECT is Engine Coolant Temperature. The ECT sensor is basically a resistor that drops in resistance as temperature increases. By adding a potentiometer, the computer is tricked into thinking the engine temperature is lower than it really is, thus increasing the engine RPMs (like when your cold start your car).
More info here:
http://www.yotatech.com/f2/high-idle...anyone-198737/
http://www.yotatech.com/f2/another-n...-ect-mod-5537/

 

Hmmmm... RadioShack has potentiometers...

Also, my buddy running 16volts has a potentiometer...


Hmmmm...

 

Hmm. If I knew which was the ECT wire going into the ECU I might be tempted to give it a shot...