I am not sure if anyone has put this or something similar in here. But here's the deal. I've been tuning muscle cars in GT4 since I bought it in its release. I cannot bring them down to 9 seconds or lower in 1/4 mile. The thing is that I don't use NOS, because it would make it easy to achieve my goal. I know that its there for a reason. I just don't want to use it because, for me, it feels like cheating(I know its really not). I want to see if I can race my car with just the "natural aspirations" of the car. The best time I have made with the 1970 Dodge Charger 440 R/T is 10.1. If I managed to get it down to this level, why not take it even lower. Or is there a barrier the game doesn't let you cross? If anyone ever manages to achieve this goal with this or any other muscle car(excluding the Viper GTS and the Cobra 427;both made good mid 9s) Please!, let me know either posting your complete procedure and settings here or a private message. Any help would be awesome. Thanks in advance to anyone that manages to solve this enigma.