The guy I was racing with at Maxton that ran 202+ had Scott Gutherie's bike. I only know what I read, but it looks like they used a 100 SHot on a bike that made at least 160 HP for at least 260 HP and the guy was not a heavy weight either (Maybe 175 max). So I would say that you need about 250 HP at least to get there in a mile and 300 to really be safe.
Remember, this is not the power needed to get to "Top" Speed, but the amount of power you may need to do it in "1" mile or slightly less