In the text file for each track, there should be a bit called Speedway or something
similar. Change the value from 0 to 1 or vice versa, I don't recall what it is by
default. Indycar uses this same bit to determine whether to use roadcourse wings or
speedway wings, Nascar uses it to invoke the dreaded restrictor plates. Without it,
I've found my Ford will end the backstraight running about 230! Good fun. Take care,
and drive safely!