The test, which was organised jointly by IMS and IndyCar, was designed as to gather information about the road course layout ahead of a planned $100 million upgrade to the facility.
Rahal and Briscoe ran laps in both the clockwise direction as used by Grand-Am and, previously, Formula 1, and counter-clockwise as used by MotoGP.
|Graham Rahal. (Photo: IndyCar)|
"It's a little different going the opposite way around, but it's actually not a bad track," Rahal said.
"When I showed up, I thought we shouldn't use Turn 1. We shouldn't run on the oval at all. But [now] I think that's what is going to make the racing so good.
Briscoe echoed Rahal's sentiments about the venue's potential for good racing.
"The track as currently set up has a lot of high-speed corners, and going clockwise gives you a different feel," he said. There are a couple of areas that could be addressed to increase passing zones, which would make the racing great."