The fastest 💯! The 1992 race at DuQuoin State Fairgrounds still stands as the fastest 100-mile dirt race in USAC Silver Crown history. Johnny Parsons won in a record time of 56:03, a 107.047 mph avg., in a V-6 powerplant. This Saturday night, September 3, the current crop will try to take down the 30-year-old record! AMSOIL INC. | NOS Energy Drink | #GSPnorthamerica | Cook Out | FloRacing | USAC Racing