"That's a marquee seat right now, that drive and that car," Ham said, "We have to live with these people for a month or two. We have to know that they're going to do what we want them to do. It's a big decision. So far, they've all done an excellent job, and no problems."

As for the test, Ham was happy with the car's performance so far.

"It's gone excellent so far," he said, "We were a little ways off with handling this morning, but we worked hard in the first session. The car is fast, handling very well and is drivable, and that gives us a lot of confidence. We cycled through a lot of drivers for the fourth seat this afternoon for the fourth seat, so everything's been going very well so far."

The team's #69 Mazda RX-8 was tested by Jeff Segal, Nick Longhi and Emil Assentato, with Segal spending a lot of time in the car, and hoping to be there full-time in 2009.

"We're still working on that for right now," said the Sahlen's Six Hours class winner, "Testing is going well. We're working on it. There's an announcement that should be forthcoming following this test. I'm also working on something for the KONI Challenge Series, ideally with Automatic Racing. I've spent a lot of time with them, and we've come a long way."

Mexican driver Santos Zanella was one of three drivers in the #21 Matt Connolly Motorsports Pontiac GTO.R on Tuesday, but admitted that it was much different than any racecar he had driven in the past.

"It's very different than what I am used to," Zanella said, "It's traction is in the rear instead of the front, and you have to be very careful with the throttle because it is very soft. Hopefully, when I get back out, I can better my time."

Also running for the Connolly stable this week are Jeff Altenburg, a former SPEED World Challenge champion, veteran team driver Ryan Phinny and Romeo Kapudija, who last competed for Hyper Sport.

Among the drivers on site pursuing opportunities for the 24 Hours were veterans Terry Borcheller, Marc Goossens, Shane Lewis and Anthony Lazzaro, former Champ Car race winner Nelson Philippe and open-wheel veterans Michel Jourdain Jr and Arie Luyendyk Jr and Sr.