Helio Castroneves and Graham Rahal swapped top honors in Friday’s practice sessions for the Chevrolet Detroit Grand Prix presented by Lear – the only doubleheader race weekend on the 2017 Verizon IndyCar Series schedule.
Rahal paced the first practice in the No. 15 SoldierStrong / TurnsforTroops.com Honda with a lap of 1:15.3328 (112.302 mph), with Castroneves second.
After Rahal led the morning’s 45-minute practice and Castroneves ran second, the veteran drivers exchanged spots in the afternoon. Castroneves’ lap of 1 minute, 15.1511 seconds (112.573 mph) in the second practice put the driver of the No. 3 Hitachi Team Penske Chevrolet atop the combined speed chart for the day.
Helio Castroneves Friday DetroitGP News Conference
Detroit Grand Prix Practice 1 – Friday, June 2, 2017
Detroit Grand Prix Practice 2 – Friday, June 2, 2017