Thanks for the response
, disagree with first part, agree with second part. Those turbo guys can sure stuff/flow a lot more air/fuel compared to normally aspirated the same displacement.
But anyway, at land speed venues how do they accomplish this (physically measure displacement) and does head combustion chamber size make a difference when they do it.
I think, they would take a pipet filled with a fluid (I have heard trans fluid), pull a plug bring piston to bottom and fill to a point right below end of plug threads, multiply by number of cylinders and you have displacement, but I am not sure if this is exactly how it is done.
Also, if this is the way it is performed, would there not be leakage around rings or piston for those who do not run rings.