In my recent adventures with recording car sounds I found out that the exterior mics are only usable up to speeds of about 100 km/h (62 mph). Any faster and the wind noise becomes too loud, and over 150 km/h (93 mph) the wind gusts in the fur even started to modulate the rest of the sound.
I'm using a widebody Rycote blimp with Windjammer (Schoeps Double Mid-Side setup inside), attached to the car body rear with a big suction cup. Putting the mic on the front or top of the car would make things impossible at much lower speeds already.
What can I do to get even more protection from wind at these and faster speeds?
(disclaimer: closed track, professional driver, the suction cup holds fine up to 250 km/h)