This is the most effective system.
Included are the plans and instructions.
I found Bob Boyce's system to be the most effective to produce large quantities of hydrogen.
My first experiments worked but i could not produce enough Hydrogen to power a car.
This system produces enough to power a 4.9 litre engine.
I did make some important design changes to my own generator.
I based my design on this.
The changes i made will be on my website shortly.
If you intend using this, please ensure that you abide by the safety rules as highlighted in red.
This particular system works for engines with a capacity of less than 3000 cc.
If you have a car with aluminium heads do not use hydrogen at all.
Hydrogen and aluminium reacts. You will lose an engine.
On the first site there is a video about a Helix coil.
Interesting.
http://pesn.com/2007/09/29/9500450_BobBoyce_Electrolizer_Plans/
The second site is the instructions and plans.
http://pesn.com/2007/09/29/9500450_BobBoyce_Electrolizer_Plans/d9.pdf
Should any of you decide to build this, i will supply you with the name of the company that Laser cut my stainless steel plates.
Have fun,and many free kilometres.