Shelby GT500 EFI Fastback sold at auction
Mustang prototype with 7.0-liter fuel-injected V8
Specialists had to rebuild this Mustang Shelby GT500 – now the only fastback prototype with fuel injection has been auctioned.
Electronic fuel injection has been widely used in cars and trucks since the 1980s. However, the first vehicles with this system existed decades earlier: Daimler used mechanical intake manifold injection in the 220 SE as early as 1958. In the 1960s, the first electronically controlled fuel injection systems appeared – Bosch, for example, introduced its D-Jetronic system in 1967. And Ford also experimented with electronic fuel injection, equipping two Mustang prototypes with it – after all, muscle and pony cars were coming under increasing criticism for their high fuel consumption.
Fortunately, original documents from the late 1960s were available for the reconstruction of the Conelec injection system.
Shelby chief engineer wanted fuel injection
One of the prototypes was the 1968 Shelby EXP 500 ‘The Green Hornet’ notchback, the other is the 1968 Shelby GT500 EFI Prototype Fastback (EFI: Electronic Fuel Injection) now for sale at Barrett Jackson, lot number 1397. Shelby tried Bosch and Conelec injection systems. The latter sits in the prototype to be auctioned. Engineer David Long had founded Conelec (Consolidated Electric) in New York, and then-Shelby chief engineer Fred Goodell was a fan of Long’s work. At Goodell’s request, Long adapted his Conelec fuel injection system to the Ford intake manifold and mounted the throttle body where the carburetor normally sits on the Shelby.