I assume you mean to have the Iracing in addition to the regular NASCAR race?
Absolutely, run the iRaces on the same weekends as the real races, like Friday or Saturday Night....put it on one of the Fox Sports networks, probably a lot of new sponsors to NASCAR might be interested and a bunch of teenagers or younger would get involved, especially if you money on the line...
Like Friday night before Bristol or Daytona, run the same automated track....and run it all season...