Mike Conway (Dreyer & Reinbold Racing) posted the fastest time of the day at 1 minute, 19.25 seconds on the 2.303-mile circuit. He was followed closely by fellow rookie Raphael Matos (Luczo Drag Racing) at 1:19.516 and teammate Milka Duno (1:27.07).

"We're looking forward to next week," Conway said. "Today and tomorrow are crucial for us to get the car quick so we don't have to change too much next weekend. Being fast tomorrow is the most important, when there are other drivers on the track."

Firestone Indy Lights driver Sebastian Saavedra also tested in an Andretti Green Racing car (1:19.695). All times were provided by Honda.

Testing continues Aug. 13 with additional drivers, including defending race champion Helio Castroneves (Team Penske); points leader Scott Dixon (Target Chip Ganassi Racing); Ryan Briscoe (Team Penske); Dan Wheldon (Panther Racing); Ryan Hunter-Reay (A.J. Foyt Racing); Justin Wilson (Dale Coyne Racing); Nelson Phillipe (Conquest Racing) and Franck Montagny (Andretti Green Racing).