Does Ronnie Dunn have an eye on a racing career once Brooks & Dunn perform together for the last time in September? Nah, he's just having fun.

Ronnie participated in the annual Speed Week at the Bonneville Salt Flats in Utah over the weekend with little success. Driving Jeff Brock's restored 1952 Buick Bonneville Bombshell, Ronnie was hampered by mechanical problems. "On my first run, it suddenly lost power at 115 mph," he tells Country Weekly via e-mail. "The boys on the pit crew said the fuel pump blew. They tore it apart and were able to repair it."

Alas, day two wasn't much better. "On the test run the next morning they burned a valve and trashed the engine," Ronnie reports.

"I think I'll stick to singing." Good idea.

Kix and Ronnie have seven more shows before their finale at Nashville's Bridgestone Arena on Sept. 2, which will benefit the Country Music Hall of Fame and Museum.