One Rolex Series team has already announced its driver to the Rolex 24 at Daytona, with Krohn Racing retaining the same three-driver line-ups as the 2008 Rolex 24 - although they will be in a new car-engine combination.
Regulars Nic Jonsson and Ricardo Zonta will team with Darren Turner in the #76 Ford Lola, while Oliver Gavin rejoins Tracy Krohn and Eric van de Poele.
All of the drivers were at the two-day session with the exception of Zonta, who tested back in October when the team ran approximately 1,800 miles.
"Doing the Rolex 24 for the first time this year was a good experience, and my first experience in Grand-Am racing," Turner said. "I absolutely loved it, and I was going to do everything I could to come back here for 2009.
“Thankfully, Krohn gave me the opportunity to come back. Now, with the Ford engine, and seeing what was achieved by the Ford guys here last year - it's a fantastic engine, very strong - it's nice to be back in the car. We're running through our programs to make sure we're in good shape for the race.
While the 2008 Rolex 24 was Turner's first experience in the Rolex Series, Gavin was one of the pioneers of the series. The Briton raced a SRP prototype in the inaugural 2000 season.
"This series has changed quite a lot, and the cars have changed significantly," the factory Corvette driver said. "The competition has gotten strong and stronger. There are some fantastic teams in it now, with Krohn Racing, Penske, Ganassi, SunTrust - the strength and depth is really there. You've got to work extremely hard to win a race now."