On my 86.5 i have norm and pwr which im assuming is the same as sport considering it's exactly what you explained. I use it full time... but sometimes when i get mad at my self for going fast and doing dumb things, i will switch it to norm in an attempt to punish myself or something lol. Im already driving with an SR22
so i gotta be good. But there is a major pwr dif between the two.. i guess if im low on gas or something i might put it on norm in an attempt to keep RPM's down.