| light went off in my head that told me it should be possible to mathematically calculate flow vs pressure drop. Thanks for the help! Here's a chart showing the total system flow for the various inlet configurations per pressure drop. For those trying to understand what this chart represents: What you are looking at is a representation of what kind of pressure drop you will need at the turbocharger compressor inlet to produce a given flow volume. The key is to have the lowest pressure drop - thelower the pressure drop, the easier it is for the turbocharger to produce efficient boost pressure to the engine. 
And now you can use the graph below to see what the CFM requirement is for a given boost pressure and engine RPM. For example: Look at 6000RPM and running 1.35bar of boost at the intake manifold. This will put a demand of 738.5CFM on the inlet system. Then refer back to the top chart along the Y axis for this flow volume. V2 w/2.1" i.d. flange = 0.86psi pressure drop
V2 w/2.37" i.d. = 0.64psi pressure drop
V1 = 0.95psi
OEM = 1.57psi pressure drop (these precise numbers were pulled from the spreadsheet data, represented here only by the chart)
Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the
tailor.
Albert Einstein
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