Kunyora kupfuurira kweiyi ndima - Mushure mekuramba kwakakwana kubva kumapoka eAmerica avo vaiwanzofunga kuti mota dzekumashure-injini dzaive dze "vatyairi vanofarira kusundidzirwa", iyo Lotus 38 yakanga yaratidza kuti mota dzepakati-injini dzinogona kuita giredhi paThe Brickyard, uye mazuva eanotungamira-injini roadsters aive apera (muchokwadi, chete 4 yevatangi makumi matatu nevatatu muna 1965 vaive mota dzeinjini dzemberi). Clark akakunda 1965 Indianapolis 500 aine ipapo nhangemutange rekodhi avhareji nokukurumidza 150.686 mph (242.506 km / h), nguva yokutanga Indianapolis 500 akanga akamhanya ari nokukurumidza pamusoro 150 mph. Nhoroondo yapfuura yakanga yaiswa naFoyt muna 1964
paavhareji ye147.350 mph (237.137 km/h). Kukunda kwaFoyt muna 1964 mumotokari ine injini yepamberi Watson-Offy roadster ndiyo yakanga iri nguva yokupedzisira motokari ine injini yepamberi ichizokunda Indy 500.