The evaporation of of the gas can actually generate enough cold to freeze the converter solid. On a frosty winters morning, before the engine is warmed up, (And when there is no antifreeze in the water) Ive seen cars that wont go till a bucket of hot water is splashed over the converter.

I am toying with the idea of a drawthrough turbo on lpg. I have most of the parts lying around already.
An idea I was contemplating, is to use the cold water from the converter (in a seperate circuit from the engine cooling system, with an electric pump) to feed a water to air intercooler. the problem is keeping the water from freezing, while having a heat souce that wont put too much heat into the cuircuit.
That was why I wondered how much heat a turbo produced.
The two seperate components of lpg boil at 0C, and -40C. If it was possible to utilise this cold to cool down the charge, massive gains in charge density could be acheived.

Plus, since it is a gas at room temp, there would be no worries about droplets falling out of the charge.