How to measure compression ratio - the RIGHT way

Want to learn how to measure your compression ratio the right way? You're in the right p[lace, because my work has been tested again and again, without a problem. Racing in a compression limited class? Where is safe and where is too close? I have the answers and am happy to share the process that works for me!
#compression #testing #volumetric #staticcompression #scca #clubracing