Crazy idea

[Twinturbo6]

I think I found what your looking for. I went to college for aerospace engineering and somewhere it was discussed, along with alot of other novel ideas. ( did you know mercedes took out a patent in 1958, that they are supposed to bring to market in the next ten years, which puts the alternator windings in a flywheel, since its always moving, and would not eat up additional power to turn, and at higher rpms could put out alot more power then a traditional alternator )

and the additional battery is not needed as the very next generation of cars will have to go to 24 volt. To keep up with the boom in on board electronics.

BTW the last three links, the first two are to companys developing this, and the last is to a board where they discuss it in detail.