Simplify the following text for a Grade 8 native English-speaking person.
Original: Minardi left the lower division at the end of 1984 , although in 1986 a modified version of their final Formula Two car , the 283 , was entered without success in two rounds of the Formula 3000 championship which had replaced Formula Two in 1985 .
Simplified: Minardi left the Formula Two division at the end of 1984 . In 1986 a modified version of their final Formula Two car was entered in two rounds of the Formula 3000 championship .