Teg
You should be able to get a descent output from a thermal electric generator from the tailpipe. A 150hp car should produce several Kw of peak power from a well designed TEG. From what I understook one of the big drawbacks is the cost.
I found this while looking around for numbers. It looks like it could be very promising for making such a setup cost effective
http://www.physorg.com/news186409698.html
You should be able to get a descent output from a thermal electric generator from the tailpipe. A 150hp car should produce several Kw of peak power from a well designed TEG. From what I understook one of the big drawbacks is the cost.
I found this while looking around for numbers. It looks like it could be very promising for making such a setup cost effective
http://www.physorg.com/news186409698.html