415HP from 318ci IS POSSABLE!!

Another thing that most overlook is the second ring gap, and especially with the pistons with a chamber or machined combustion gas space between the top and second rings. If the second ring is tighter than the top ring (gap) then the compressed gases can and will lift the top ring off the cylinder wall and cause the top ring to become unseated from the cylinder wall and piston. Virtually dropping cylinder pressure down. This is why gas port pistons are so popular in good bracket race engines. They use combustion gases and pressures to seal the top rings to the cylinder and pistons. But these rings are a good bit more money as are the pistons that use them.