Not inconceivable a Corvair, or most any car, could reach 200 mph if properly set up. YMMV.
Maybe 170:
There's plenty of other examples of balled-up vehicles in this event.
extended story:
VIDEO OPTION Vol.200 Part 2 of 5 - Death Defying Crashes, Car Fires, The Drift King, and MORE! | GT Channel
... and occasional fatalities:
Camaro driver and navigator die in Silver State Classic crash - Autoblog