One thing I just recalled doing:  The question at at hand was how to tell if the air flow into the injector vents is enough to help with LOP operation (it improves the atomization).  One experiment I did was to do a "lean sweep" at full throttle (non-turbocharged) and record the data and note when the engine starts to run rough.  Then I pulled the throttle back just enough to drop the manifold pressure by about 1 inch and repeat the test.  The idea is that this increases the pressure drop across the injector by 1 inch and if there was an atomization problem before this should fix it.  My results were not entirely conclusive, but generally the engine would run further LOP before running rough.

Gary Casey