“Maytag Racers” did indeed use the 1-1/2 hp Maytag washing machine gasoline engine in a boxy wooden soapbox-derby-ish car. They were fairly popular especially in Southern California in the ‘30s. This eventually led to the formation in 1950 of Quarter Midgets of America, still racing all over the country, an orginization that has brought us drivers like Terry and Bobby LaBonte, Jeff Gordon, Sarah Fisher, Jimmy Vasser, Ryan Newman, Reed Sorenson, Stephen Leicht, Joey Logano and many more.
Check it out at quartermidgets.com or quartermidgets.org.