100 pound loss = how much HP gain???

Doesn't matter, you ran the MPH. It works. If you are way off, don't blame the math, look at your car. My car does 99mph which calls for a 13.3 run. It does it. My friends Duster runs 114 mph, which calls for 11.5's, it does it. It works!
He drives it to the track with 354 gears? Steel wheels, four speed, and is 3300 lb?..