The Ace was an American-assembled car made in Ypsilanti, Michigan by the Apex Motor Car Company, which was reorganized as the Apex Motor Corporation in 1921. The initial batch of cars assembled was sent to Seattle, Washington dealer F. E. Earnest, who had the idea for the Ace after he was unable to secure a steady supply of new cars for his dealership.[1]
The most interesting feature of the Ace was the Guy Disc-Valve motor, created by engineer Fred M. Guy, and Otto W. Heinz.[2] Initially, it was prepared as a four-cylinder engine for production in the Hackett, but the company folded before it was ready.[3]
In April, 1921, Guy and Heinz left the Apex Motor Corporation, with the support of Apex, to found the Guy Disc Valve Motor Co. in Ypsilanti. In mid-1921, a Model H tourer with a conventional Herschell-Spillman straight-6 was added, with a selling price of $2,000.[2] The man at the helm at Apex was by now Harry T. Hanover. In 1922, the Guy engine was gone. The Model F Pup was added to the range, fitted with a conventional