I have an old tank manufactured in 1990 or thereabouts with an internal EFI pump which was built for liquid injection by a local company called Carmtrol. Sadly the seal for the pump assembly is unavailable so I can't get it tested. The tank makes a neat refuelling system. The liquid injection fuel pumps are just an upgraded version of the ones used for petrol, with ceramic bearings as the lpg liquid doesn't lube well. If you want a small liquid injection pumped tank talk to Orbital Autogas, they are developing liquid injection for quite a few newish cars. Betcha it will still cost around $1K though, lots for a "jerrycan".

