Defender Diesel / Gas

[Zeros]

I've noticed recently more Defenders with gas conversions. How common is this?

Is Hybrid Diesel / Gas a practical and affordable option for the imminent demise of diesel as a fuel?

Can Td5 and Puma engines run on gas or only Diesels without ECU?

1996 Land Rover Defender | Cars, Vans & Utes | Gumtree Australia Port Adelaide Area - Blair Athol | 1201945780 (https://www.gumtree.com.au/s-ad/blair-athol/cars-vans-utes/1996-land-rover-defender/1201945780)

[p38arover]

LPG is added - it's called LPG fumigation. The vehicle still runs on diesel.

A good system will be ECU controlled, not manually like some out there.

[bee utey]

Looks like one of my conversions. It's mechanically controlled (no ECU) and allows the engine to run at up to 20-25% substitution rate. I did about 20 of these conversions going back a few years and most of them are still going fine. Normally they save around 10% of your running costs if used without using much extra power, just by using 1/2 priced LPG compared to diesel.

[one_iota]

So if a gas conversion is the answer what was the question?

A gas conversion only made sense on a 300 tdi when the cost was subsidised by the tax payer.

Even then it was marginal.

Modern Diesel engines are at the limit so adding anything more is a waste of your dollar.

[Zeros]

Looks like one of my conversions. It's mechanically controlled (no ECU) and allows the engine to run at up to 20-25% substitution rate. I did about 20 of these conversions going back a few years and most of them are still going fine. Normally they save around 10% of your running costs if used without using much extra power, just by using 1/2 priced LPG compared to diesel.

Thanks bee utey, much appreciated. Good to hear they're still running well.

It sounds like it was great in its time, but possibly not a big future in it? No one is really talking about gas as a vehicle fuel anymore. ...I wonder when the same will happen to electric! [bigwhistle]

[bee utey]

Thanks bee utey, much appreciated. Good to hear they're still running well.

It sounds like it was great in its time, but possibly not a big future in it? No one is really talking about gas as a vehicle fuel anymore. ...I wonder when the same will happen to electric! [bigwhistle]

The problem for diesel gas is that it works best where engines have plenty of extra oxygen in the intake above and beyond that used for combustion. That means oxides of nitrogen were produced in large volumes and more modern engines address this with EGR's and suchlike. Modern diesel engines are so tightly controlled that diesel gas would cost too much to use for the limited benefits.

[Zeros]

The problem for diesel gas is that it works best where engines have plenty of extra oxygen in the intake above and beyond that used for combustion. That means oxides of nitrogen were produced in large volumes and more modern engines address this with EGR's and suchlike. Modern diesel engines are so tightly controlled that diesel gas would cost too much to use for the limited benefits.

Hey thanks man for the info. Interesting to read as a very amateur Defender-taught mechanic [thumbsupbig]