Despite scoring one pole position, the next two years were largely unsuccessful, and he switched to the Belcar series in 2001 with a Porsche 996.
After returning the German F3 in 2002, and finishing fifth overall, van Hooydonk was again promoted to F3000 and remained there for the 2003 and 2004 seasons, with moderate success.
This was not enough to get him a drive in the new GP2 Series which replaced F3000 in 2005, and, despite a test with the MF1 Formula One team, he returned to tin-top racing by competing in the European Mégane Trophy for that year, finishing the championship in fourth whilst driving for ex-F1 driver Thierry Boutsen's team.
He also is the first Champion of the Porsche Carrera Cup Benelux winning it in 2013 Van Hooydonk has also competed in some endurance races at Zolder, Spa-Francorchamps and Le Mans.
1991 J. Plato 1992 P. de la Rosa 1993 O. Couvreur 1994 J. Matthews 1995 C. Sauvage 1996 E. Bernoldi 1997 J. van Hooydonk 1998 B. Besson 1999 G. Bruni 2000 F. Massa 2001 A. Farfus 2002 E. Salignon 2003 E. Guerrieri 2004 S. Speed 2005 K. Kobayashi 2006 F. Albuquerque 2007 B. Hartley 2008 V. Bottas 2009 A. Costa 2010 K. Korjus 2011 R. Frijns 2012 S. Vandoorne 2013 P. Gasly 2014 N. de Vries 2015 J. Aitken 2016 L. Norris 2017 S. Fenestraz 2018 M. Fewtrell 2019 O. Piastri 2020 V. Martins