The best way to eliminate driver influence is for both cars to put both cars DCT in the same mode, and both cars use vBox's. I'm not sure you remember seeing these, but my buddy made a program that can create a racing video directly from the vBox files. If you
tell the program to race from 40-140, 60-130, or whatever, then the program will line the cars up and create an exact video of the race based on the data in the vBox files. Everything is perfectly to scale and eliminates driver influence or one driver jumping the
gun on the other, etc.
Take a look:
If you both don't have vBox's, go get them or borrow them. You'll like using them anyways. Then when you're done, send me the files and I'll have my buddy make the video.