[Christ]

What I'm thinking is that if you can get the EGR flow into the cylinder before the clean intake air, you won't have to worry about stratification. The EGR just blocks the bottom of the cylinder, pressing the mixture closer to the top of the cylinder/spark plug.

What I'm worried about is whether or not the EGR flow comes from before the O2 sensor in the exhaust stream. If you're reintroducing pre-measured O2 into the engine from the exhuast, it may cause you to run slightly rich, since the O2 sensor will be reading the same exhaust parts more than once.