Not sure if works the same as ME7 but if it does try;
KFZWMN: -20/-30 figure out what works best for you
KFZWOP: first row -20 from original value
KFTVSA: As you like, I've set to 2.55 sec
With this u make pops and bangs on overrun. For a true hard limiter u need to patch the bin. But you can also use KFTSRL i believe, but it's not a good method. Read
https://s4wiki.com/wiki/Tuning#ME7_Documentation and search for hard limiter.
Read for more info on pops and bangs
http://nefariousmotorsports.com/forum/index.php?topic=7174.0title=