A well-running engine also includes optimized compression. Because you should neither risk an overheating or even a hole in the piston, let alone renounce performance. It is important that the compression ratio is optimal for tuned engines. Air-cooled engines do not tolerate such a high compression as water-cooled. In addition, the crushing dimension must not be undershot, since otherwise the piston strikes against the cylinder head.
Optimize geometric densification
The geometric compression is determined during the assembly of the cylinder head.