Kr is in excess of 3*, His max he is getting is around 8*. And I can tell you now, he wont be satisfied with having even 3* and neither would I. 3* of KR running N/A is the same as 3* running S/C. I'ts still 3*. Yes it is much easier to get kr running S/C but 3* will do the same amount of damage on both motors weather there supercharged or N/A