My friend says he is able to run a generator delivering 50 kW of electric power and 30 kW of heat for 6 kW of input power, which I am pretty sure is because of the use of "cold water fog" in combination with the Brown's gas.
However, all this is perhaps a bit off-topic, because it is not a Meyer replication since all of these are run with "normal" electrolysers using an electrolyte.
Don't be concerned about being off-topic, because if you have a friend that has an electrolyser that can deliver 80KW from a 6KW input all our energy worries are over, and we can forget all about Meyer!
Have you not considered just forgetting about all this stuff and simply asking him how he does it? The two of you could be billionaires next week!
Of course I asked how he does it. Essentially the way Patrick Kelly describes how to convert a generator to run on water in chapter 10:
http://www.free-energy-info.tuks.nl/Chapt10.htmlI am not sure if he actually got a generator running delivering 80 kW, I suspect he extrapolated these numbers from experiments with a somewhat smaller Mercedes engine / generator.
He is currently building a generator set with a big V8 engine which is put in a sort of container. They have a couple of these planned to build and sold in The Netherlands and Belgium.
In there, there are using like 24 plate electrolysers each consisting of 12(?) stainless steel plates of about 30x50 cm with a distance of something like 1-2 mm between the plates. These are very similar in design as Bob Boyce' plate electrolysers:


He does not have the pipe on top and the plates are fully submerged under water. Outside the outer plates there is no water, which has led to problems. Some electrolysers exploded and it looked like the HHO migrated straight trough the RVS metal, they said. They had this investigated by a company who never saw the kind of damage to RVS plates these things got.
All in all, the electrolysers are quite big. You are talking about needing a space like 1-2 m^3 just to place the electrolysers.
The electrolysers are running on pulsed D.C. with a voltage of about 1.8 V per indivudual cell. The electrolyte they use is NaOH.
He said it is very important to mix the gas with cold water fog. I don't know how they make that.
For my project, I will be using a standard carburetor with adjustable nozzle:
http://www.tuks.nl/WFCProject/img/Engine_Carburator/bing_carb_2.jpgMuch easier than the venturi system described in Kelly's book, because with such an adjustable nozzle one can tune the system on the fly, while with the system described by Kelly one cannot tune the system other than try different diameters of the channel drilled in the venturi pipe:

So, as far as I can tell Kelly's recipe works, but is a bit impractical to put on a car, because you need considerable power to the electrolyser and the electrolysers are quite big. And you need destilled water and an electrolyte. That is one of the reasons I am attempting to get a Meyer replication. When the power to the electrolyser can be reduced by a factor 10 or so, life becomes much easier. And it also appears that Meyer's tube construction can deliver a lot of gas in a relatively small space.
Becoming billionaires is out of the question. The big problem with these kinds of technology is that it threatens the foundation of the petro dollar and the whole financial system attached to it. The whole fiat currency system is at the verge of collapse and the money itself is essentially toilet paper with a good looking message printed on it. And that's only a small part of the "money" in existence, like 4% or so. All the rest of it is nothing but numbers on a computer, not even worth the paper it is not printed on. But don't worry about becoming billionaires. Given the current "QE" policies which are applied world wide, we might just all become billionaires pretty soon:
http://www.zerohedge.com/news/2013-09-23/qe-worked-weimar-republic-little-while-too