I have HO, not the "real thing".
Someone had an amazing track here in town though. We are talking a few road courses, a drag strip, and a HUGE oval that was up going around the room above the other tracks.You went up into a mezzanine to race your car around the oval. And the records were CRAZY like a few seconds around this upper track.
I remember cars like this doing it in seconds! It was a blur,you could barely even see the car it was going around the track so fast.