The AC time trial server is currently running Suzuka with the 787B and the NSX-R if you want to set some times.
You shouldn't need any DLC, and the mods you'll need are in the Mega below. Had to update the NSX to fix an issue with certain CSP versions, so you'll need to redownload that if you'd already grabbed it.
As usual, let me know if you've got any requests for the next track.
server: vrg time trial
pass: tfwnodriftfu
mods: https://mega.nz/folder/51UwSJ5L#yojjZdETcm95G2DMdKzSBQ
leaderboard: http://198.23.223.127:50041/lapstat