Wikipedia:WikiProject Motorsport

aims to create and improve articles related to the World Rally Championship, rallying in general, and hillclimbing.
Participants

is a project to better organize information in articles related to NASCAR.
Participants

aims to create, maintain, expand, update, and align articles about all elements of motorcycle racing.
Participants

is a project to better organize information in articles related to Open Wheel Racing held or based in the United States, with an emphasis on the IRL, Champ Car, and Indy/Championship racing under the AAA and USAC banner dating to c.1902, the first year of nationalized event sanctioning.
Participants

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Wikipedia