Last week we ended the building of our long-planned new full hydrogen on demand cell. This baby planed to be highly efficient and to use the maximum space possible of the water filter. Our target with this HHO cell was to produce high amount of HHO without overheating the tubes, the water and the electric wires.
The details:

1 Standard 10” water filter housing. (we just love that item :] )
18 couples of : stainless steel tubes, inner tube (ID 6, OD 8) , outer tube (ID 10, OD 12 mm). Between the tubes there is plastic place holders, we used plastic clips with the right thickness (1 mm). On top of each tube stainless steel electrical connection was welded to connect the tubes to electricity. After connecting the wires, all connections was isolated to prevent unwanted leakage current. From plans to real life:
The SSL tubes was the most expansive parts because we wanted high grade stainless steel according to the 316L standard. Tubes was cut to dimension of our choice (160 mm).
The PVC plates was cut using hacksaw from a bigger plates and drilled using desk-drill with the help of printed 1:1 version of the holes location can be found here: Base Drilling A4(PDF)
2 PVC plates for holding the tube couples in place, 3 threaded metal rods for stability between the PVC plates.

The 3 threaded rods connects the Tubing-home to the upper base. The upper base has two more rods, each one use both as electrical connection and as holder to tubing of this assembly. All inner tubes connected to one rod and all outer tube connected to the other. Might look just like this:
The final step is to connect the upper base to the cup of filter housing. this can easily be done by drilling two holes in the cup and attaching the cell’s body using the two upper rods.
The final result make us smile after all the hard work: a massive HHO generator. Take a look:
The next step is to find most effective point of this cell and to determine if one HHO cell is enough to drive car or maybe there is need for three or six or maybe ten cells to keep up with the pace needed to fuel a car only on HHO.