In 1926 AAA introduced new regulations that limited engine size to just 91 in³ (1.5 liters) to slow the cars. Harry Miller, an American race car designer and builder, who build single-seater race cars and engines since 1919, had to create a new engine for his new cars and his existing customers. To make up the lack of displacement, Miller and his team fitted a centrifugal supercharger. Some of the very first blown Millers appeared in 1925, on the 122 in³ engines. By the time the 91 in³ formula was set, Miller could already produce more power from the smaller displacement. With nearly 250 bhp on tap, the 91 could top out 171 mph. Miller produced both a rear-wheel drive (RWD) and front-wheel drive (FWD) version of the 91. At least 10 FWD and at least nine RWD cars were built. Millers 91 dominated the AAA races and filled most of the Indianapolis field from 1926 to 1929, winning the 500-miler in 1926, 1928 and 1929.
Louis Meyer, who later became the first three-time winner of the Indianapolis 500, started his first Indy 500 in 1928 (he drove In relief of Wilbur Shaw in 1927 however) as 23-year-old dirt track star. Meyer qualified his rear-engined Miller 91, entered by Alden Sampson II, to 13th position. He runs a steady race, went into the lead in the final part of the event with 18 laps to go and led his two-years old car to victory.
The scale models of 1926, 1928 and 1929 Indy 500 winning Millers were made by Replicarz in a limited edition series.
|1928||AAA National Championship||Indianapolis 500|
|Louis Meyer||14||Alden Sampson II|