Read about repeated cycles of searing combustion heat alternating with cool incoming air and fuel, extreme load reversal, thrust forces that slam the pistons into the cylinder walls.

In this tech article HOT ROD provides a guide to new piston ring technology and takes a look at many of the latest product offerings and provide recommendations for your setup - Hot Rod Magazine ...

3. After using the piston ring squaring tool, the ring gap measured 0.019-inch. That’s a 0.005-inch difference, which in the world of high performance engine building, might as well be a mile.