September 19 2014 New Hampshire Sylvania 300 NASCAR Practice #1 Speeds and Averages Ryan Rantz NASCAR News, Practice Speeds 10 Lap Averages, Average Speeds, Best Speeds, Fastest In practice, Loudon, New Hampshire, New Hampshire Sylvania 300, Practice Speeds, ten-lap averages New Hampshire Sylvania 300 NASCAR Practice #1 Speeds and 10 Lap Averages More