[Concrete]

don't know which "Kansas" you want to answer... me or ihatejoefitz but I'm willing to comment:

it is not that HHO systems "don't work"
it is that HHO probably doesn't work as well as it is claimed

generating a fuel from one of the most stable compounds on the planet (water) using an cheap alternator driven by a mobile otto cycle gas burner is a thermodynamic loser.

The chemistry in the cylinder will have to be almost miraculous to make up for all of the energy conversions in the system.

but we will see and Silvernight will create the data
I trust this site to vet the data - the HHO sites, not so much
and if it works I'm building one!

There are other tricks the HHO guys use to tweak their engines, and they may be as much use as the HHO. I'm just as interested in them.

by the way: ihatejoefitz and my concurrence has less to do with Kansas and more to do with engineering. Although for being a Kansan, he did pick the wrong school :P