Very interesting info.
For those of us with fancy-pants computer controlled fuel injection, this sounds like a great opportunity to "chip" the vehicle for biodiesel.
When I used to play with LPG systems many years back, one could advance the timing, sometimes significantly, but to get the real benefit, the timing advance was not just a straight x° at all RPM, it was a curve that depended on many factors.
Of course, most straight LPG mods would just advance the timing 10° and be done with it. In a dual fuel setup, most installers would simply "trade-off" and put it at 5°. Not the best for petrol, or for LPG, but somewhere inbetween. I was not happy with this idea, so I managed to source a little box that would modify the timing curve depending on your RPM and other factors that you could program. It was switchable, so you could wire it up to your LPG switch and have it kick in only when needed. This way you could get the best of both worlds. Obviously, this sort of device is much easier when your timing is electrical, not mechanical, as it is for diesel.
Nevertheless, in theory, it would be possible to program a modern ECU to have 3 different profiles: 1. Dino, 2. Biodiesel, 3. SVO. How cool would that be?
I doubt that any manufacturers or 3rd parties would be doing this sort of thing for a while, but wouldn't it be nice?
I'd certainly buy it.