Thread: Thinking of converting my P38 to LPG??

Just to throw some petrol on the fire,

This Probably won't suit your needs, but myself and some guys on the Rangerovers forum are looking into the new Liquid Injection and Flat Gas Tanks.

The LPi system does away with the conventional Converter, and a pump in the tank, pressurises the system to 5bar above tank pressure. The Liquid is then fed into a fuel rail and is injected directly onto the back of the Valve Stem. Apparently its a massive step forward compared to conventional gas systems. It also has a side benefit of cooling the air as the liquid changes to a gas inside the head. Considerable benefits in fuel consumption and power. Prices are expected to be only slightly more than Gas Injection. There have been a few falcons getting around for a couple of years now as test cars, and no problems reported. From what I understand is that it will start to become more widely available towards the end of the year, when an OZ designed injector is being released.

The other thing is the flat tanks by PPI which are made of Alluminium.

I too am looking at LPG but will wait until hopefully this new system is proven, as I have bigger things to do to the car first, like a block rebuild.

Apprarently, there is a really good vapour injection system for the BOSCH motors, which actually increases power etc... but is more pricey. Deacon Auto told me when I was looking.

Good Luck

They originally had liquid injection before vapour injection. But they found the cold gas cracked the pistons. I wonder how they got around this issue or are there modifications that have to be made to the motor.

Not Sure about cracking pistons, this gives me something else to chase up. I would guess its due to the advancement in the injectors, being able to meter a smaller amount.

The amazing trick i've found is that apparently the one injector can run both fuels through it, they replace the OEM injector with a new one and just switch the supply to the fuel rail. I'm still skeptical about this.

Stu