UPDATE: Just completed another experiment on the strip. Used, FZR, XRT, FOX, LX6 and RAC. Did COUNTLESS trials to ensure accuracy and eliminate variables. In EACH car, the improvements were at LEAST .1 seconds greater with throttle cut DISABLED. Cars with turbo chargers were able to achieve times upwards of .4 seconds greater with throttle cut DISABLED. This means that flat-shifting in LFS DOES affect speed in a straight and according to my previous test, around a track.