I'm not able to find a reliable source for this number.

Does anyone know?

I need the information so ProM can calibrate my drop in MAF

look for a hydraulics specialist locally to sonically clean them - you'll also find out the flow rate at cleaning time, 2 birds 1 stone...

I am sending my injectors off today and the guy cleaning them will report back to me what the post cleaned flow rates are, and, of course, I will post them on this board for everyone's benefit.