I just came across some newer videos showing the quad-turbo setup the Curran Brothers Racing recently installed on their quad-rotor powered Mazda RX-2 in action. In November the combo was able to reach the six-second group with a pass of 6.97 sec at 195.53 mph (video embedded below). There is no telling how low this will get with further refinement. To see how the car got started please read our previous article.
Update 2/4/2016 – New video showing 6.96 at 202 mph run
Source: CBR Youtube and CBR FB page