On this page of our trophy guide to RAGE 2 we have provided a detailed description of Acid House (silver trophy). An achievement is awarded for completing a race on the Torn Plains with time below 3:03. On the site we have published a set of tips on how to complete the race in short time.
The location where you can unlock this trophy is called Chazcar Derby: Torn Plains Track in the region of Torn Plains.
The race track can be visited on your own but it's better to simply wait until the Wasteland Celebrity mission. One part of this mission involves participation in the race.
The race is not very difficult and the trophy can be obtained even if you don't have good skills in the racing games. Use nitro as often as possible cause it speeds up and accelerates the vehicle a lot and has a short cooldown. Launch nitro right after the start of the race. Use it on every straight parts and segments of the track. Avoid using the nitro immediately after hitting the trampolines and when you approach a sharp turn - you may fall on the outside part of the track and lose time or even jam on something.
Achievement does not require you to win the race, but in the process of making an effort to unlock it, most probably you may win the race. There are many paths on the route. You can use them, but it is not mandatory. Just focus on the perfect ride. The choice of wider sections of the road reduces the risk of collision with some obstacles.
You should complete the race without any problems in less than 3 minutes. If you make any serious mistakes, you can pause the game and choose to restart the race. It will save you a lot of time.