Does racing around a track at speeds up to 230 miles per hour sound interesting to you? How about doing it in front of 350,000 screaming fans? If you think that would be a good way to pass the time, then Indy racing is for you. Indy cars are some of the sleekest, fastest, most advanced racing machines in the world. But it hasn't always been that way. When Ray Harroun won the first Indianapolis 500 in 1911, his average speed was 74.5 miles per hour....