haven't tried this myself, I'm still trying to get comfortable
truning laps at 197. Anyway here is the information I have:
If you go into your Talladega .txt.file and look at the 3rd. line, it says
"spwy 1 ### ###" (don't remember what numbers are in place of ###).
Change the "1" to a "0" and you will remove the restrictor place! Be prepared
to revise your set-ups, 220 MPH is harder to handle then 197!
Hope this helps!