[V8] Subject: LP/CNG/and LNG conversions

[Tony and Lillie]

The need for heat is as you stated, to keep it from freezing up. Any time 
there is a reduction of pressure, there is cooling. This is how your A/C 
systems work as well.

As for the pre-heating, I recall nothing like that on any of the propane 
powered vehicles I've worked on. However, they all used a "carburetor" 
setup, as opposed to the port injection you are looking to do.

Tony

----- Original Message ----- 
Subject: [V8] Subject: LP/CNG/and LNG conversions

> Some further research on the preheat question turns up an interesting 
> tidbit.
>
>
> Seems the vaporizer/regulator needs to be kept warm NOT so much to 
> vaporize the propane, but to keep it from freezing up! Dual fuel vehicles 
> do this by starting on gasoline until the water temp is up, then switching 
> to propane. The vaporizer/regulator is connected to some heater hoses and 
> that keeps it warm.
>
> Propane-only vehicles may ice up before the water temp comes up.
>
> Now just suppose we placed a 12 volt 300 watt ceramic heater in a snug 
> little insulated box in combination with the vaporizer/regulator? Turn on 
> heater, warm regulator a minute or two, start car. When water temp exceeds 
> 50C, ceramic heater clicks off.