Turning one cylinder into an air compressor involves a lot more than just disabling one valve, unless the guy was pumping a very explosive gasoline/air mixture into his tires. I think Forrest Gump's Mama had something say about that!
Jerry
I found an old gizmo that we had used years ago to pump up a gas line with air for testing from the 48 GMC shop truck. Uses the cylinder compression to compress air and has an outside air intake so it doesn't pump gasoline vapors. Called an Enginair Tire Pump, made by G.H. Meiser & Co from Chicago. Here's a pic (needs some new hose.)
