it's the same as your nuetral rev limiter. it stops you at 7,100 rpms.
If your car is in nuetral you will hit it.
If your car is too cold you will hit it
If you have a bad launch and over spin the tires you will hit it.
(the ecu thinks you're free reving and sends you into the rev limiter)
I have 15" dr's and I got this a few times because of the smaller tire. I accellerated too fast and the ecu hit the limiter.
We've also had it happen on a turbo gts running a lighter flywheel. he just went too fast for the ecu to understand
anyways. hope this helps explain things