Take a Fox .60 and a Fox .74, the .60 has a bore of .905 and and a stroke of .937, the .74 has a bore of 1 inch and a stroke of .937, no matter what you do to those engines other than change one of those demensions, they're still going to be a .74 and a .60. You can use terms like effective or corrected but they do not change that, the swept volume will always be the same. You can improve the volumetric effeciency somewhat by altering the port or cam timing, utilizing tuned pipes etc. but usually at the expense of tractability.