How about this for a durability test?!! And it was 45 years ago…..140 MPH average for 24 hours. Think of all the things you’d be testing….Engine oiling, oil temp durability, wheel bearings, driveline parts, tires, seat comfort, hey…..even hearing loss right?
In 1968 when American Motors introduced the AMX, they were serious about showing their stuff. A 24 hour test like this was almost unheard of for a production car and who better to head it up than Land-Speed record king Craig Breedlove and his wife Lee Breedlove?
Two cars were prepared for the endurance speed runs on a five-mile banked track in Texas. The shattered records included a Class C AMX (the No. 2 Lee Breedlove car) with the standard 290 cu in (4.8 L) AMC V-8 (bored to 304 cubic inches) with 4-speed manual transmission, achieving a 24-hour average of 140.79 mph (226.58 km/h) that was set by Craig and his wife Lee. New records in a Class B AMX (the No. 1 Craig Breedlove car) using the optional 390 cu in (6.4 L) AMX V-8 (397 cubic inches) with a 3-speed automatic transmission, that included a 75-mile (121 km) distance with a flying start at 174.295 mph (280.501 km/h), as well as a 173.044 mph (278.487 km/h) over a 100-mile (161 km) distance from a standing start.
Later in 1968 Craig took one of the cars to the Bonneville Salt Flats and set a USAC Sanctioned Land-Speed record of 189 mph. This was in 1968!!!! Crazy and impressive stuff!