Soldato
Drivers will only go as fast as they feel safe, so you can add 10000000bhp, they still won't go faster than they feel safe.
Well, that's how it should be. Folks keep whining about how it's all in the car these days and not about who the best driver is. Well, give the drivers a car with a ludicrously powerful turbo engine+KERS setup and I'm sure you'll see the decent drivers coming to the front.
KERS didn't work last season for several reasons. 1), it was restricted too much. 2), it was restricted too much. And 3), it was restricted too bloody much. If TPTB would just open up the rulebook a little bit, then KERS would actually be a worthwhile endeavour.