To get this achievement, you need to have the Chronorang unlocked by collecting all 90 Golden Cogs. Once you've done that, you're going to want to start a "Race" mission. (This can be any race on any mission) I recommend doing a race you haven't completed before as that is going to be the easiest method. Simply equip the Chronorang at the start of the race and win the race to unlock this achievement. If you've already done all of the race missions, you will need to beat your old time with this 'rang in hand. Good luck!