For mild street engines, stock valve springs are more than adequate. But if you've screwed in a big bumpstick for strip-banging or banzai runnin', then pay attention. Our plan was simple: Install a ...

Karl Benz is typically credited with designing and building the first automobile powered by an internal combustion (IC) engine, but it was almost 80 years earlier, in 1807, that a Swiss by the name of ...