See a conservative strategy pay off, as Mark Donohue saves his Turbo ’Offy’ engine in what would turn out to be a race of attrition. Only 13 of the 33 cars were running at the end! Donohue delivers Roger Penske his first ‘500’ victory, the start of record success for “The Captain” at Indy. | Indianapolis Motor Speedway Museum

Going into the weekend spitting flames 🔥 Work at the restoration never ceases! The crew have gotten the 1973 Eagle Turbo “Offy” running. This car finished 2nd, driven by Bill Vukovich II. The Eagle/“Offy” combination was a mainstay for this early era of winged IndyCars. #Indy500 | #70s | #INDYCAR | Indianapolis Motor Speedway Museum

The “Offy” 4 cylinder doninated Indycar and handled some insane power due in part to the head and cylinder being cast into one piece. #indycar #offenhauser #4cylinder #4banger #offy #harrymiller #engine #turbo | Speedway Motors