[6][7] Busi began his Italian Formula 3 career with the Trivalleto Racing Team in 1988, before moving to Benecchi Corse in 1989 and Piemme Motors in 1991 (although he did have an outing with the team in 1990 at the Monaco F3 race, but he did not qualify).
That season he did not finish a single race, ending up not being classified in the standings.
[citation needed] After taking a break in 1993, Busi returned to racing with the Unicorse team in 1994, driving an Alfa Romeo 155 under the newly adopted Super Touring regulations.
For 1995 he stayed with the Unicorse team but only competed in two rounds, both held at the TI Circuit Aida, placing 10th and 13th respectively.
[3] For 1996 he returned to Italy, competing in the Italian Superturismo Championship with the Motortrend team with a Peugeot 405.