How does cid make power?

Yes everyone for 7 pages have been telling me how adding 50 cid (not a trivial amount) would gain NO perceivable amount of horsepower (in this eg.). Oh wait that was me and they been arguing the opposite, added displacement equals added hp. This shows fault in your guys logic, you don't want to answer cause this shows you could be wrong.

The answer isn’t a simple “yes cubic inches makes power”. Rat Bastid, rumblefish360, and many others have explained and answered the question quite well.