[Thomasio]

Here are results of the roof ducting (see previous posts in this thread) airflow. I'll spin this off into its own thread at some point.

An Extech vane anemometer was used to record airflow *out of* the back side of the intercooler at different car speeds form 0 to 100 mph.

Two scenarios were recorded: first, without supplemental roof ducting, and second, with supplemental roof ducting.

Here is a graph of the airspeed raw data (feet/min).

In essence, the supplemental ducting is adding a parallel path from the Cup roof scoop to the intercooler duct. The original "mailslot" path is still there, and the ducting is adding an additional pathway around the mailslot.