After start finish you need to align the car for the left corner out of sewer. If you are desperate you can use Micro DS Drift before the corner to be more on the right.

Use Tap DS for the left hander out of sewer. Hitting the wall here is not a lot slower, but if you want a good lap no walls will be hit optimally

After junkyard drive left around construction side

The rest can be done without using DS, just try to drive tight lines through all corners.

On reverse the first part is driven without DS

At construction side use the shortcut in the middle

When jumping down Jump Tech can be used to keep speed

Use Tap DS to get into sewer without hitting the wall