Specific article Re the blackouts: https://www.carthrottle.com/post/a7zykr8/
After Qualifying, drivers concerns were raised, and the race even occurring was in question. Patrick Carpentier went to the medical facility to have his wrist checked. He had suffered an accident at Long Beach and was worried about the G-Forces his wrist was being put through. When asked why he was concerned about his G-Load, he told doctors that he was not able to walk straight for 4 minutes after getting out of his car. CART then organized a private drivers meeting away from the media, and asked drivers if they had experienced these symptoms. 21 out of the 25 drivers in the meeting admitted they had experienced this. Most claimed they had experienced disorientation, inner ear, and vision problems after 10 Laps on track. At least half of the drivers claimed that after 10 Laps they had no peripheral vision and reaction time was increased by up to a full second. Soon after the end of this meeting, Dr. Olvey contacted Dr. Richard Jennings at the University of Texas. Dr. Jennings told him that these conditions are only experienced if the human body experiences over 5.5G’s of force. Jennings also told Olvey that the human body cannot withstand these forces for more than 7 Minutes at a time without losing consciousness and that the race could not be safely run at more than 225mph (362kph). That night, CART officials shut there doors and tried to devise a plan.