Real World Flow Differences 2.08"/ 1.74" Valves vs 2.14"/ 1.81" Valves " Pictures Added"

I’ve never tried opening up the port opening on a stock BBM head like what the OP has done, so I have no idea how that would impact the flow numbers on otherwise unported, mildly ported, or heavily ported versions.
(I guess that’s where the flow bench comes in handy)

But I do know the std port opening itself is big enough to support nearly 360cfm........ which I have gotten out of std port Victors without making the port openings any bigger than how they came ootb.