Nunn would later go on to be a prominent chief engineer in the American-based Champ Car series, winning championships with drivers Alex Zanardi and Juan Pablo Montoya in the late 1990s.
Nunn máis tarde pasaría a ser un enxeñeiro xefe prominente na Champ Car serie con sé en América, gañando campionatos cos pilotos Alex Zanardi e Juan Pablo Montoya a finais de 1990.