That was the time when I had the stock tires on. I only did 3 runs before it was rained out and they were all 16.0, if I got a few more runs I'm sure I could pull a 15.8

I don't really know how the elevation changes the air, but we have good air quality here. I think below sea level air is more dense, so that would be better but I don't know for sure

The thing is that once it hits 4th there is not much acceleration. I was hitting 81mph at the 1/4 before the supercharger and with it I hit 86-87mph I think. So if you think about it the .6 differance is mostly in the 0-60 if that makes sense.

It also passes on the highway a lot faster then before. When it downshifts to third you get some more balls for sure!