i say, for a new track, how about a 6 mile straight. that way, you can see how truely fast your car goes. if that was in LFS, and if i could use it, i would get my XRT setup from version X, rename it, and see it's real top speed. on the BLW GP Reverse on version X, i only got it to 134 mph (223.333... kph) before i needed to hit the brakes.