Jon Milledge Engineering was established in 1981 to provide a consulting base for racing applications and engines. Jon started building racing engines in 1965, at first for his own racing efforts and as success grew, for selected customers. At that time, Jon was engaged primarily in the computer industry.

The early efforts were concentrated upon English Ford engines using Cosworth parts initially and gradually developing parts of his own design. His early efforts were dependent on advice from a camshaft designer(John DeLong) from San Jose, Ca. who supplied the camshafts and was an incredible source of engine related information. Early engines developed were 1340 pushrod English Ford, Lotus Ford Twincam(to 212bhp in 1973), F5000 Chevrolet and 2L Porsche 911.

In 1973 Jon began to concentrate on Porsches. In 1979 he formed Autosport Technology with Dwight and Linda Mitchell in Sacramento, CA to concentrate on Porsche performance. Racing  was still his first priority. In 1985, Jon and Walt Maas won the Firehawk Gran Sport Championship with the Norelco Cup awarded to Jon. The primary sponsor for this effort was Carlsen Porsche of Palo Alto, California. In 1986 Carlson arranged for support from Porsche and Quaker State to campaign a 944 Turbo in the Escort Endurance series. Jon & Walt were co-drivers until Walt decided to retire. Price Cobb & Drake Olsen drove with Jon for the rest of the season. The engines for 1985 and 1986 were prepared by Jon.

One of two Projects Racing 944s featured in VW & Porsche magazine. This car is campaigned in the Sports Car Club of America’s Improved Touring S class as well as PCA Club Racing.