Scale Model Running Challenger Flathead V8 By Ron Colonna

Challenger V8 Ignition: Spark Bore: 1 in. Stroke: 1 in. Displacement: 100 cc Max RPM: 6, 000 This engine was built early in my gasoline engine building career. I received the castings and drawings as a Christmas gift from my wife. I had it running about five months later. This is the engine that creates the most interest at the shows. So much so that I ve had to rebuild it twice because of wear. As designed, it had some major shortcomings. The conrods were bronze castings which promp