Even with super soft tires, unless it's got ginormous rear slicks on rubber coated asphalt, how do you put enough power down to pull anything close to 9 Gs. The car weighs about 500 kilos or so... I think it would just spin the tires...
EDIT: even during cornering, I think about 9 g is about the limit a human body can handle. I wonder if the driver will experience head aches...
Maybe the HUGE fan creating 1000kg of downforce will help with traction and if that's not enough then the additional 1700kg of aero downforce at 400kph should be enough to achieve the 8.25G's in the corners