By Alek Arend NASCAR took to the dirt racetrack at Bristol Motor Speedway on Easter Sunday. And, as expected, it garnered impressive TV ratings. The sport announced on Tuesday afternoon that the dirt race at Bristol Motor Speedway had 4.007 million viewers. That’s a significant increase from last year’s race at Bristol (3.122 million viewers). The big difference is this year’s race was held on a Sunday. Last year’s was on a Monday. That isn’t the only factor, though. NASCAR’s audience keeps growing. Sunday’s dirt race was the most-watched NASCAR event at Bristol Motor Speedway since the spring…