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I know this is older news but here's a few good articles on Chip Ganassi using an old PA Turnpike Tunnel as a wind tunnel.
Has anyone ever made the hike to check it out?
http://www.racecar-engineering.com/articles/nascar/the-secrets-of-laurel-hill/
http://www.roadandtrack.com/motorsports/features/a24696/racings-secret-hideout-ganassi-tunnel/
