Overestimating is possible....

Is it really that bad, hard to get it over 70?

See I'm thinking without the SC, it would be about equal to a little less powerful than the N/A. If that's so, then it's possible that's where it is.

Now if it really is as bad as you are saying, without exaggeration, hard to get to the speed limit on the interstate, then it is definitely working, because it still has some power.

The whole reason I got to thinking this is a couple of weeks ago I was driving down the road with maxcichon, me in the srt6 and him in his roadster, he got a head start but I was having a hard time catching up, me with my foot to the floor, and him however fast he was going. His car has some work done to it, so it's faster than a stock N/A, but the fact that my foot was on the floor and I was slowly catching up to him worried me. I figured I would be able to catch up a lot faster with the extra HP the SC adds.