I've gotten my Toyota Supra to a ET time of 6.56 on 2 separate occasions
Suspension is level 2 with everything 1 click shy from the far left, front tires one click right, rear tires all the way to the left, steering one click right, gearing..1st is a few clicks to the left and everything else one click right, and final drive about 3 clicks right. Cam and both turbo boosts are all the way right, and nitro about 5 clicks to the right. Body kit is stock, hood is stock, and hit the nitros right when it goes into 3rd gear. If you get max grip and nail the start, you'll be in 6 sec ranges easy