100 pound loss = how much HP gain???

Lets say your car weighs 3000lbs and the engine has 400hp ..........and 100 lbs loss = 6hp gain, then if you lost 3000 lbs you would gain 180hp. Which means that a car that weighs "nothing" and has 580 hp would do the 1/4 mile in about .2 second????:realcrazy:
Well, in theory you cannot lose the weight of the motor, tranny, rear end and tires. So the max you could go down to would be 3000 to about 1000. LOL