"Much Ado About Nana" Ep. 2x22 - March 17, 1993
Jill's mother, Nana, is coming to visit for Mark's birthday.
It's interesting that none of the episode synopsis pages that I've seen say anything about the slot track.
He has what appears to be a 4x8 sheet with a 2-lane oval routed on it. Parma controllers and cars. The scene is SHORT! In fact, these screen shots come from the end of the show when the credits are rolling! This is when Tim loses and puts on his secret weapon: the car with a Dust-Buster motor installed (4th picture). It wails off the straight and through the sliding door (You can see that in the 6th picture, right side of the photo).