Has anyone installed a water conversion kit for their car or know if they are legit?

Try and search for any possible combination of terms related to this subject. 9 out of 10 sites you find will be sites trying to sell you these systems. Of those that aren't, most will be powerpoint or PDF presentations with no substantial information, and any that do talk about hydrogen injection (which is NOT RUNNING YOUR CAR ON WATER...and a legit operation would not be trying to tell you that it is) do so only in the context of diesels.

Go ahead. Find me one study. Find me one review which actually does anything other than give a vague hand-waving explaination and then tell you to buy it.

Oh, and then there's all the pages throwing in another environmental hysteria buzz-word, "hybrid." There is nothing "hybrid" about these systems, and it is just an attempt to cash in on ignorance.

Everything about how they present themselves, and the lack of supporting evidence, screams "scam."

Not sure. I do know a guy whom I work with who converted his S-10 Chevy pickup into an electric car. The conversion kit cost him $10,000. Of course, he installed the kit himself, seriously reducing what it would have cost. He's had bugs as well; for example, burning out three controllers and he doesn't know why and only being able to get 25 mph out of it.

If you don't know what you're doing, the kits are ineffective anyway.

http://www.springboardblog.blogspot.com/

They are bogus. They are supposed to work by producing hydrogen fuel but the kits cannot produce sufficient hydrogen to run an engine and your engine won't run on hydrogen anyway as your engine is designed for a liquid fuel and not a gas.

They tried do do this on mythbusters once and it didn't work.

The energy required to get hydrogen from water is more than the energy created by the hydrogen. Oil is expensive and we will pay dearly for it until new technology is developed.

engines can run on gas LPG and also hydrogen ,

water can be converted to what is called BROWNS GAS , it wont be long before its done, but will the government intervine is a question to be asked .