I'll have them for you in a sec. The car can't be see-through because the program treats that as a bunch of lines, not an object. I'm overlaying them with 40% grey so the program will recognize it. They also need a little more space above the car. I'm doing this as well
Using 120 incoming velocity and 45 viscosity. It's what Chaz recommended. The top one shows the full window.
In my opinion it looks like the axle bumps are really big. They are negating any gains from the rear belly pan on the second simulation. If the thing were attached at the line of that axle and angled up juuust slightly it would help out a lot.
