Beginning in 1991, he raced in the USHRA/Camel Mud & Monster Series Carolina Crusher placed sixth and became the series champion of the Special Events season. In 1992, the Porters decided to build a second truck in order to compete in three different monster truck series. A third Carolina Crusher appeared for the 1994 season, as did a new shop to host Carolina Crusher Racing. The trucks made 125 appearances in 1994. 1995 saw Carolina Crusher finish fourth in the Special Events Penda Points series and winning a race. He continued to race Carolina Crusher until after its sale to Paul Shafer in 1999.
In 2000, Clear Channel Entertainment hired Porter to drive various trucks for them, notably Ragin' Steel and Spider-Man. The following year, at the behest of longtime friend and rival Dennis Anderson, he began driving Grave Digger 12. He continues to drive the truck and has had tremendous success in it, as it is similar to his last incarnation of Crusher.
Off the track, Porter is regarded as one of the sport's true gentlemen. The 1992 USHRA Yearbook referred to him as "Mr. Nice Guy".