Originally Posted by ExpensiveTaste
Lol, disregard the size of the turbocharger. The volume in the intake manifold/cylinder head ports remains the same. So the only way to get more mass is to increase pressure or decrease temperature (very likely the main piece that adds power if pressure remains the same). You may get more flow from the compressor but you are still forcing the air into the same amount of space (volume).
The volume of the intake mani, fly head, etc isn't changing. The volume of air being introduced by the larger turbo has increased. IDK why you're still arguing, a few different people (Inc. Shiv) have told you otherwise. If you're still not convinced, call hpf, full-race, Cobb tuning, or any shop that fits larger turbo's. They'll explain it to you.
One last piece of proof:
Acura rsx type S
greddy turbo kit @ 15PSI will make 300whp
full-race turbo (gt35 turbo) @ 15psi will make 500+ whp
Only variable is the turbo, manifold