I really only use one math to measure my car's efficiency, and that is MPH / 1320. Other than that, it is what it is. No calculator showed my Duster going 13.3's in it's current state, but the ET slip is the voice of truth.
I beg to differ, from the ET slip we get>
3500lbs?/292fwhp
60 Foot E.T. : 1.85
1/8 Mile E.T. : 8.41
1/8 Mile Trap Speed : 80.81
1/4 Mile E.T. : 13.33
1/4 Mile Trap Speed : 101
and as you ran 99mph I think your 60-1/8th was prob a bit better than 1.85/8.41
:)