<prompt> Qedela umusho olandelayo: Imininingwane yobuchwepheshe ye-Indianapolis 500 okwamanje ibhalwe yi-IndyCar. Imithetho ngokuvamile iyafana nanoma yimuphi omunye umjaho we-IndyCar. Esikhathini esedlule, ikakhulukazi ngesikhathi i-USAC ivumela i-Indy 500 kodwa i-CART ivumela eminye imijaho yezimoto ze-Indy, imithetho e-Indy yayihluke kancane ngezikhathi ezithile. Umphumela, ngokwesibonelo, kungaba ukwakheka okuthile kwe-chassis noma kwenjini okusemthethweni e-Indy, kodwa hhayi emicimbini evunyelwe yi-CART. Lokhu kwakujwayelekile kuma-1980 nasekuqaleni kwawo-1990, lapho izinjini ze- stock-block okungukuthi i-V-6 Buick zabelwe izinga elikhuphukayo lokukhushulwa kwe-turbocharger yi-USAC e-Indy, uma kuqhathaniswa nezinjini ze-V-8 quad-cam ezakhelwe injongo. Ngenkathi izinjini ze- stock block zazisemthethweni ngokomthetho emncintiswaneni we-CART, azinikwanga inzuzo eyengeziwe yokunyusa, okwenza ukuthi zingabi nokuncintisana, futhi zivimbele ukusetshenziswa kwazo amaqembu. Isibonakaliso esidume kakhulu sokungafani kwemithetho ye-USAC kwakuyinjini yeMercedes-Benz 500I eyakhiwe yi-Ilmor eyenziwe nguRoger Penske ngo  <response>: Ngo-1994 kwaqedwa. 