HP v/s MPG

[acidskie]

ok so are we saying that a person can for the most part bump up their horse power, not touch the gearing or the tires/wheels, and still get around the same MPG driving like they normaly did prior to the bump. I just can't see someone with thier foot to the floor getting the same mpg @ say 350hp as when they were stock @ 260hp. Its gotta suck up more gas doesn't it?

But what I'm really tring for here is if I bump hp, and continue to drive in a reasonable manner... does gas mileage suffer and around how much does it suffer. Not really looking for pinpoint data... just for those who are still running stock gears and orig tire size to let me know if they have suffered loss in MPG due to the added HP. I am very thankful for all info though.....