Beat 1 minute 7 seconds on Construction Site in Detonator.
You will need to do this in quick play, since you can select any course and any car. Choose either the fastest car available (the GT12 Elite, unlocked after coming 1st in every Elite Race), or a very fast car you are comfortable with. This will take a lot of practice, and requires using the shortcut through the collapsed building. Some recommend other cars, but some cars work better for some drivers. I would recommend the Elite, as its speed and acceleration perform well on the straightaways. Strangely enough, one thing that seemed to improve my performance was switching to bumper cam.
Ok this one was a little hard. You will need to beat the construction site detonator in less than one min seven seconds. The guide suggests the GT12 Elite. Don’t get me wrong the Elite is a fast car, but I just couldn’t do it in that car. Now if it’s easier in that car for you then good for you. However if your having trouble doing it, try the Ryback cyclone RS, it’s almost as fast as the Elite but it makes up for it by being able to corner better. The elite just didn’t have the handling that I needed to do this race. That is why I’m suggesting the Ryback cyclone RS.
The Ryback Cyclone RS was definitly much easier to drive than any of the other cars for me, I tried many times with the Elite and kept failing, but with the Ryback, I eventually got it, after several tries, but keep driving, be aware of the precise moments in which you know you could be better, focus on those, and eventually you'll get it.