i've heard of people that have been told by tuners that it's part of having a large cam. that's crap as a proper tune can tame all but the biggest. it does take a lot of tweaking of the AFR and timing tables and frankly i don't know how well that would work on a mail in tune. i spent quite a bit of time playing with my tune on the street and it's as tame as stock now. (i have a 228/232 .611/.600 111 lsa)