1973 24 Hours of Daytona – Race Profile and Photo Gallery Page Six
Later that Friday morning the predicted rains came, throwing a monkey wrench into any attempt by the remaining cars to qualify for the race on Saturday. When the times of those rain-soaked cars were tabulated many did not make the minimum average speed (98.322 mph) to be placed on the grid.
Speedway President Bill France, Sr. was not pleased when he was informed that the starting grid would be far smaller than he expected. He arranged for a meeting with both the FIA and SCCA officials to see what could be worked out. Late Friday evening the officials announced that a third qualifying session would be held the day of the race (Saturday) between 10 am and 12 noon for those cars that didn’t make the cut. Seems that Mr. France was greatly worried about the appearance of a diminished starting field and wanted as many cars as possible out there to take the green flag for the reborn Daytona 24.