http://www.google.com/help/features.html#calculator
140 cc * 60 = 2.21904523 US gallons
That's 2.2 gph. At 6lbs per gallon, that'd be 13.3 pounds/hr. However, stock injectors are supposed to be 32#. From my conversations with BG, injectors put out different amounts throughout the range. For example, a 50# injector doesn't always put out exactly double the amount a 25# injector would... I don't know enough about it to say much else...
I'm guessing that their flow rate test won't really tell you much about how the injector will work in the engine, but only give a before/after comparison at that one setting.
Out of curiosity, where are they, and how much did that cost you?