Ok, the 308.8 mph I attained with my Escudo was accomplished on the Test Course doing Machine Test, max speed. I went backwords, of course, to give me indefinete ammount of tries, although I only do one full circuit. The Escudo was fullymaxed. I used super soft tires. I am in class now and can't give a full account of how I tweaked it, but it was fully lowered, with full downforce. Spring rates were set to the max, along with bound and rebound. I brought the gears fully wide, then made the total ratio around 2.000. I also tweaked all the gears individually. It comes out so that first gear takes you through 61 mph, and I know that 5th takes you up to 260. TCS was set to 5, and the 4WD was set so that 10% was front wheels. I forget the slip settings, but I played with those too. I haven't had time to get it up to 310, and I am losing hp because I was rubber band laming the SuperSpeeday Enduo, so I need to win another one for the full 1881 hp.
Anyways, anyone should be able to do it.