Been testing it for the past few months and no major issues to report. I made the active grille block permanent. The code will evolve over time in order to fully automate the process. As it stands, it is fully manual, but it's not that bad. I rarely have to adjust the opening. Half-Open is often enough to keep the coolant temp in an optimal range; around 96 deg C.
The big benefit will be in the colder months. I am pretty sure that the active grille will remain closed in the Winter. We shall see.
I am planning to do some coastdown testing in order to try and quantify the drag reduction.
Here are some pics. I still need to install a mesh grille as to shield the shutters from incoming debris.
