Carpenter dominates Fast Five during Thursday practice
Helio Castroneves turned in the fastest lap of the day at the Indianapolis Motor Speedway at 227.166 mph.
Grey skies were the order of the day for Thursday's practice, although the rain stayed away for the most part.
Ed Carpenter 226.257 mph
Will Power 225.899 mph
Townsend Bell 225.484 mph
Ryan Hunter-Reay 225.340 mph