Evolution of Indycar Engine Sounds

After the recent success of Evolution of NASCAR Engine Sounds I decide to look at the evolution of Indycar Engine Sounds / noises. All rights goes to ABC,ESPN,NBC and FOX Sports and Indycar Credits PeriscopeFilm, NARLtv, Nespeshny Blog,Ryan Holman, sphaera666,XERB1090,indy44, cmcgato2,Buggy1Boy, Michael McIntyre, champcar4ever,Guy Steele, luke stevens,MotorsportsHistoryTV, doctorindy, cjs83172,TICE123, Jeff Hunker,Georgia Wheeler, Richard A Salamon,solbiate11, Patrick Smith,British Pathe and jogodik