I had a chance to check out Bangkok Drag Avenue up in Patum Thani (near Alpine golf course). A fun way to spend a Saturday evening. They have a quarter mile track where all classes of car can race side by side. I saw times range from 9-14 seconds. You need a car to go (no taxis around), and there is an entrance fee (240 baht ?). Some YouTube clips here. Photos. Google Map location.