Dobson also drove numerous IMSA and other Sport car races, including the 24 Hours of Le Mans in 1989 in Porsche 962 alongside Jean Alesi and Will Hoy and at Daytona and Sebring, where his best finish was a 2nd place in 1990, co-driving with Sarel van der Merwe and Klaus Ludwig.

Zephyr originally had its shops in San Rafael, CA but moved to a new facility built at Sears Point Raceway in the spring of 1985.

Zephyr's customers competed in SCCA regional and National events as well as the American City racing League.

In the late 1990s he was involved in a short lived North American Touring Car Championship's Dodge Stratus factory team that ran in conjunction with CART race weekends.

He also is co-founder and COO of VR Motion Corp in Hillsboro, OR, a company that builds products that power Virtual Reality experiences for the automotive market.