thanks SeaMonkey, looking good.
About the salt, i just used that for passivation. Caustic Soda (NaOH) will be the
electrolyzer in the car.
I will be easy on the salt next time because i have seen some corrosion around
the nylon shims.

.
I tested the cell on my car. When about 11-12 amps i had 1 LPM.
I think that's ok with this configuration.
Connected it to the air filter and expected something to hear but that wasn't
the case.
Exhaust gasses though seemed to be pure water (no smell and clear fluid
drops when holding my hand to the exhaust).
When installed properly i will go to the garage where they can test the
exhaust gasses (hope they will work with me).
Have to test it running some miles and see if there is any difference in fuel
consumption and engine power.
Maybe the engine has to burn clean first.
Meanwhile i can work on a parallel configuration.
To be continued!