Very impressive Mark.
Nice to 'speak' to someone who actually knows the technology.
You mentioned that the diesel dual fuel system uses gas injectors with the straws.
That will be similar if not the same as the LPG liquid injectors now available for petrol engines. They inject right onto the valves like a port injection system does. There would be a slight vacuum caused by the cylinder draw whilst the valve is open on a diesel.
That injector technology is only about 10-15 years old, so must have been pretty new when you developed your little black box.
The only time I've come across this system is on a previous generation Hilux.
As you may know, LPG has quite a high octane rating (120 RON or so), and the liquid injection technology has allowed more precise metering of fuel using the engines own ECU (piggybacked) to actually generate a higher power output than its petrol equivalent.
I have a mate with a Holden VE Commodore SS 6.0 with this type of system, and on gas its easily quicker than the S8 (when he can get traction
).
Sorry to hijack the thread Tintin... as you were!