Here is the scientific study undertaken at Easter with photographic evidence to prove the soundness of our experimental methods.
First up, we took the fumigation delivery method invented and patented by Kiwibacon, as used on his 3.9L diesel Rangerover.
Here is the LPG being delivered to a standard Toyota Hilux:

This system proved effective, but there were obvious limitations to the acuracy of the LPG volume being delivered. We rekon the engine ran so well, there could well have been a 2jz hiding under the bonnet!!!!!!!
As we needed to better regulate the delivery flow, we went and searched on the internet and found the best flow regulation system was that which was developed right here at home by our own LPG fumigation expert, Mr Kiwi Bacon.
We employed the patented Kiwibacon LPG Fumigation flowometer to better control our delivery rates. Here is evidence of the employment of this device:

This sorted out all our detonation issues with this engine, and because of the fact that the hilux would n0w smoke up Jafa's 40" Iroks in 5th gear, we must be getting at least 9000Nm of torque!!!!!
We needed to come up with better delivery methods, as a LPG bottle straped to the bonnet complete with high pressure warehouse garden hose got in the way of the window washers spray path. Also, not all 4wd's have stratigically placed snorkels.
After a bit of trial and error we got Gimmemuds truck running well delivering the LPG like this:

We reckon his motor was performing to the equivilant of a Commy V6, but there was a small amount of detonation as the engine temp increased, and a bit of blow back coing from the header tank.
We also got some good results with the below method, but it also caused problems at high RPM resulting in a 33" flat spot and a drop in straightline performance:

As "Fogging" had been mentioned to us, we thought we should turn our highly educated attention to that method as well. To do this, we needed higher quantities of LPG so had to employ both the Patented Kiwibacon LPG Fumigation Flowometer to regulate flow, and the BBQ gas bottle for extra burn.
We tried to Fogging the engine bay of Tintin's Surf with good results, but the potential for massive detonation and a potential explosive power increased was anticipated. See the photo below, note the incorporation of the BBQ gas bottle as well as the Kiwibacon Flowometer:

The above was one of our best and most correct scientific experiments. Filling the engine bay with LPG via the intercooler was a great method, as the LPG passing through the fines ofthe intercooler also helped to cool the air going into the engine!!!!
The ultimate experiment was to increase the performance of the JohnDeer ride on. We fogged the crap outa that fawker, and got the 10m long center strip ofthe driveway done in under 4 mins, 2mins quicker than the previous record, where the ride on mower was running on baked bean gas.

When then got wondering about other abstract uses of LPG fumigation. I metioned that the ZUKI could do with extra performance, as he as having a hard time keeping up the local neighbour hood cats, and they used to sneak of with is food.

There was a deffinate improvement in torque, with made for better bite, but straightine speed was lacking due to constantly being tail happy and spinning out of control in circles barking.
As you see, we had good results, with all test subjects reaching over 900Nm of torque, with no detonation, apart from Gimmimuds cam shaft, but that could have been from the 6hrs it had already spent that day sitting on the rev limiter.
Result:
LPG Fumigation Works.
KiwiBacon Does Not.
Note:
No engines or animals were harmed in this scientific study.