Enter the game directory and find the file that corresponds to a track, such as "/nascar2/tracks/bristol/bristol.txt". You can edit the speed of the pace car by locating the line that begis with "PACEA". Change the last two numbers in the speed (it can have more than two digits) that you want to be the pace speed. Because the pace car is slow at accelerating, it will most likely not reach anything extreme but it still exceeds its normal speeds by far.