quickly found 2 sources...
thisone:
http://nanohub.org/resources/6570/do...12-Woodall.pdf
*suggests* a 15% HHO enrichment gains 30% in economy on diesel engine.
they are also working on a low cost catalyst (vs platinum) for electrolyzing the HHO. from Purdue university
and running a plantoil as a diesel substitute this study suggests success as well:
http://www.inderscience.com/search/i...ry=&ps=10&m=or
niky: in your area you should have no difficulty finding someone with an experimentative nature with some kind of japanese IDI diesel (up to late 80s) - to prove your concept!