jims right,,, if you have the same volume in your inlet track,,, it would take the same volume of air from your turbo to get it too the pressure you want!

boils law states it

p1 x v1 = p2 x v2

there is soo many factors to this question its mad!

but cylinder presure changes if you change the turbo and run the smae boost because you will reduce pumping looses,, and as alex said VE