Extra batteries & HHO production.
This is an idea which we have been planning to test for a while.
We planned to have 2 or more DCB in the boot, whilst leaving the existing battery arrangement in place. The DCB would not be connected to the car's electrics, being charged with battery chargers at home, possibly having an extra pair always on charge to swap over. A large custom built drycell or multiple drycells would be ran solely off the DCB array. I seem to remember that 100 or 200Ah batteries were being considered, so two giving around 2-400Ah. With 2hr journey being considered then a maximum of 200A per hour could be used to produce HHO. This would probably be in the region of an extra 12 litres per minute on top of the 2lpm from the normally installed kit.
Not sure how this would work out in practice, and it would present some difficulties to implement, but I would be very interested to find out at some stage.
A bit expensive to set up initially as well.
I'd also be very interested to know if anyone has done such an installation in a normal sized car.
-Buster