Most NASCAR race teams build their own engines. Some smaller teams lease engines from a team that builds engines. Building your own engines can allow a team to customize their car to their drivers style and abilities. But teams do not have free reign when it comes to building their engines. NASCAR has strict rules and guidlines that the teams must follow when it comes to the engines.
Assuming no issues they are replaced after every race.
In a given year there can be 65+ teams, though not all of them are "full-time" teams (they only race partial season races)
Yes, they can. Racing teams usually consist of one driver per race team. But they can have multiple drivers race each of their cars during the season. If you mean teams per owner, there is a four car team limit in place. That is the most Nascar will allow.
Yes, very much so. Charlotte, North Carolina is home to the Nascar Hall of Fame and many of the teams race shops are also located there.
You lap someone in a Nascar race.
NASCAR Race Day was created in 2005.
NASCAR Race Day ended in 2006.
NASCAR Race Hub was created in 2010.
Hendrick Motorsports builds their own cars and engines at their own motor shop for their race teams.
No, he did not. Nascar owns the car numbers and leases them to the race teams. Rusty Wallace's race team using the #2 was Penske Racing.
No. Earphones are not mandatory at a Nascar race.