Look at your design again. You have +nnnnnnn-+nnnnnnn-+nnnnnnn-.
If your cell is set up that way you will have real issues. You don't need a + and a - between each stack. One power plate will do both. In fact you would only make gas between the power plates with the neutral plates just taking up space. You also have at least one too many neutral plates in there. It all depends on the voltage your Willeys puts out. Also hopefully you have converted the Willeys from 6 volt to 12 volt and used an alternator instead of a generator. If not your device is far too large for even the largest automotive generator. Hope that helps.
Larry
2008 Nissan Frontier 4X4 Nismo. 12 MPG baseline with my normal commute and heavy stop and go daily driving. Generator installed and working on 3/29/2009
Up to 14.5 MPG with no enhancers. Still testing the effects of lots of HHO and no electronic enhancers.