Be careful using words like “any”, “every”, “always”, etc. The results with things like cam timing are rarely definitive. For example, if the cam has 4 degrees ground in already, and you move it forward 4 more degrees, do you think what you said would still hold true?
Good question. If the cam already had 4* ground into it and then it was advanced another 4* for a total of 8* wouldn't that cause the intake valve to close that much sooner? I'm just asking I'm not saying it would