For the first time since last August the sound of sprint cars will be heard around the Knoxville Raceway tonight. It is practice night, a chance to test and tune equipment and for some of the rookies a chance to get on the track in a non-pressure situation to hot lap. Practice runs will begin at 6:15 and will go until nine. Admission to the grandstands is free and a pit pass is just ten dollars. Concessions will be open as well. Opening night is next week.