Yesterday I jury rigged a flexible pipe totry getting extra air to the rad. The number plate box extends back well past the bottom of the rad and about 10-15% of the rad is shielded from the grill airflow. I went for a run and it does have an effect, though small. The gauge showed about 2 deg lower until traffic slowed things down. Worth investigating more though so will put a second one on and do some better tests. It looks a bit odd at the moment with the rough cut flexi hose visible by the side of the number plate. It is an attempt to duplicate the scoop style air box intake that can replace the original.
