Belloc started racing in single-seaters and won the French Formula Renault Championship in 1992, at his second attempt, after four wins.

Moving up to the French Formula Three Championship in 1993, he took the title the following year with five wins.

The following year he became a Chrysler works driver, in the Oreca Chrysler Viper GTS-R, and took third place in the FIA GT Championship, also racing in the American Le Mans Series.

In 2006 he drove occasionally in the FIA GT, ALMS and Le Mans Series, where he took an LMP2 class win at the 1000 km Istanbul.

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