i understand exactly what a restrictor is, in turn - available flow in a given diameter of a pipe, restrictor or your pvc reticulation is the same, professor metro-testicle. Its why iv copied what they said on the thread as they applied the same calc. obviously ur gonna get a shit load more of losses.

I wouldnt of ported the turbo inlet if i hadnt already ported the standard up pipe.

The larger cross-pipe has already proved itself for me, i gained more top-end with my previous tune with the vf-34 @ 20 psi- albiet slightly more lag becuase of the larger diameter in the x-pipe.