Extra grandstands are expected to be added to the Newcastle Supercars track, due to the huge amount of interest from fans.
More than 10,000 people turned out to Saturday's community fun day at Foreshore Park, where tickets went on sale for the first time.
Some people lining up for more than four hours to get their hands on trackside passes and grandstand seats.
Supercars Australia CEO James Warburton says they were overwhelmed with the response from the public.
"Corporate facilities and grandstands will well and truly sell out before time," he said.
"We've got the ability to build more (grandstands). It might mean there's a bit of revision to the plan that we have."
Click here for details on buying tickets to the Newcastle 500.