Engineers have a lot to think about when designing new engines, and one of the biggest considerations is the shape of the pistons in the cylinders.

Tell the truth. Did you seriously consider the piston choices when building your last engine? Most hobbyists concentrate on the head flow, the cam specs, the intake choice, carb size, headers and many ...

It goes up, compresses a violent explosion, and goes down. A piston's job is easy enough to understand, but if you examine what it's required to do, you may be amazed it works at all. Think about ...