&lt;p>Just a few years later, that turbocharged V-6 had graduated from pacing the Indianapolis 500 to racing in it. In 1984, driver Scott Brayton drove his Buick-powered March race car to a 204.638-mph one-lap speed and a 203.637-mph four-lap average, setting new records for a car with a production-spec engine block. By the mid-1990s, a more powerful version of the Buick turbo V-6 helped Eddie Cheever turned the fastest race lap ever at the Brickyard: 236.103 mph during the 1996 Indy 500. It&amp;rsquo;s a record that still stands.&amp;nbsp;&lt;/p>