With limited space. Most drift tracks end up looking basically the same. This is due to the requirement for side by side and radius corners.
But that soon gets boring. So making the track flexible is the key to long run interest. just a few variations can lead to endless combinations. this is 7m x 6m
A little more space doesn't necessarily mean the design changes. It just gets faster. this is just 7m x 8m
if you implement a real "straight" you need space to straighten and turn in. so the length shout be at least more than a simulated 100 meters. 1:10 = you need space.
once again... trace a line here and see how many different ways you can go until you find a similar way.