I guess I could link you to tests performed by NASA's Jet Propulsion Laboratory, by dozens of automotive rags and universities, and I could explain why gaining better fuel economy using an HHO generator violates the laws of physics and thermodynamics, or I could point out all the psuedoscientific bullshit on any of those HHO pages and tell you how to tune your engine without wasting your time and money on your HHO generator, but that would be too negative for you right? I mean, as long as I am not telling you that an HHO generator will give you better fuel economy and cure Grandpa's chronic back pain while ending third world hunger, I'm just a naysayer...
Don't start comparing yourself to astronauts and inventors because you are trying to use something people have been putting in cars for 50 years now that still hasn't worked, aside from the statements from some people are confused because other changes they make increase their fuel economy, then they attribute it to their HHO generator.
There is no such thing as free energy.
But yeah, sure. Go ahead and prove me, and thousands of other scientists and engineers wrong. Just save your "naysayer" speech for when you actually do anything. I can build a water electrolysis device and wire a couple potentiometers and resistors to my MAF in under an hour for under 20 bucks with parts I can get at any radio shack and hardware store. You can't even finish that step.
Come back when you know enough physics to understand what needs to be improved in an ICE. Then, I would be happy to explain to you why an HHO generator is so inefficient. Here's a hint, it has nothing to do with what they try and say when trying to sell you a "dry-cell generator". By the way, even Nikola Tesla thought that generating hydrogen through electrolysis in this manner was woefully inefficient... But I'm sure he is just a naysayer and a closed book too.