If you want to tune your scanner into the USAC frequency for Indiana Sprint Week use: 461.6375. The raceceivers frequency for listening to USAC talking to the drivers will be 464.5500. Many of the tracks are now using 469.5000 and 469.5500. These are all UHF frequencies.

The old VHF dot frequencies: 151.6250 (red dot)and 154.6000 (green dot) are seldom used by anyone anymore because they have so much interference from McDonald's and other fast food resturants drive thru and they can be purchased at Walmart in the talkabouts. Although the World of Outlaws still use it.