I discussed using waste heat to improve efficiency in the water fuelforall forums with very little interest shown.
I'm glad to find someone who shares my enthusiasm for this idea WaytoGo.

Exhaust is too hot for using without increasing cell pressure to keep the electrolyte from boiling without some serious and dangerous high pressure engineering.
Using waste exhaust heat to generate steam and then use the steam in a steam engine (air tool) to generate electricity for a cell is another story.
My idea is to put a cell in the engine coolant loop so that the cell is heated/cooled (temp kept constant) buy the the waste heat that is usually dissipated by the radiator.
(keeping the temp constant like this should enable the use of a more efficient 7 or even 8 series cell)
Now you have the issue of the electrolyte boiling.
The way to stop this is to increase the pressure in the cell and then keep it constant while bleading of any excess for use in the engine.
(increased pressure=smaller bubbles=more electrode surface area=better efficiency)
A pressure release valve will do this nicely.
A radiator cap, the same as the one already in your car, is specifically designed to do all the above at the temperatures being used!

Then to a bubbler; then to the engine behind the airflow meter or carb:
Because you have pressure you dont have to suck in the HHO.
Adding the HHO before the carb or airflow meter means that fuel is being metered for a mixture that already contains its own fuel and the perfect amount of oxidant.
If you are turning your cell's power generator with waste heat -- steam engine/airtool you end up with free HHO!
