Hi everyone im new t othis forum and have a few questions. My first question is what car on GT4 has the higest top speed and how fast have you gotten it to? Also, is the some kind of universal gear ratio for all cars to make them go fast because I play with the gears all day and never get my cars over 293 MPH with nitrious. My fastest car is my Supra that goes 293 and my Viper SRT-10 that goes 292.