Thread: Power Upgrade

The comment about diesel cars not being allowed in U.S.A is an interesting one I have the 300tdi and a VW Golf 2.0ltr tdi. From the information I have read the reason the European diesels don't go to U.S.A is due to the poor standard of diesel over there. Apparently North and South America have the worst standard diesel in the world.

Interesting thread Gents.

A point raised was that of putting Gas onto diesel.

I have read a lot about this being done with 4.2 Patrols and the results from that were pretty good, but has anyone done a gas over diesel for a TD5.

I am thinking about getting a TD5 Disco, and would appreciate any info from members who have done this conversion.

Cheers,

Roger

I was going to post some info onto the whys and whens of th EGR valve on the tdi 300...

and some other info about the nuts and bolts of the 3 stages for tweaking the pump and what they mean to your emmissions...

Then i smiled and rememeberd the sage advise of a bloke who built diesels and tuned em when multi stage injection was being finessed.


"dont add more fuel to the flame front if you dont need it"

This thread appears to have become a flame front...

Originally Posted by 97discotdi

The comment about diesel cars not being allowed in U.S.A is an interesting one I have the 300tdi and a VW Golf 2.0ltr tdi. From the information I have read the reason the European diesels don't go to U.S.A is due to the poor standard of diesel over there. Apparently North and South America have the worst standard diesel in the world.

absolutely correct. The US are only just now in the transition stage of introducing ULSD to their market with a decent cetane rating and most of the nasties taken out.
The quality of the fuel is so important to emission production and control, it can't be ovestated.

Originally Posted by rogerb

Interesting thread Gents.

A point raised was that of putting Gas onto diesel.

I have read a lot about this being done with 4.2 Patrols and the results from that were pretty good, but has anyone done a gas over diesel for a TD5.

I am thinking about getting a TD5 Disco, and would appreciate any info from members who have done this conversion.

Cheers,

Roger

The TD5 doesn't benefit as much as the older diesels with power and economy and at $4000 to $4500 depending on how many gas cylinders you want, the cost (even with the rebate) takes a few years to recoop.

Here's a link to the results of the diesel gas upgrade for all the Rovers they do.

http://www.dieselgas.com.au/landrover.htm

Baz.

I have long suspected that the dangers from diesel emissions are overstated - they fail the logic test. While the use of diesel engines has vastly increased in many European cities over the last fifty years, there seems to be no long term trend in cancer cases to reflect this.

But the perception that they are dangerous has, as stated, led to the supercession of the Tdi and Td5 engines. The danger from the particulates probably is very dependent on the composition of the fuel (in the same sense that the dangers of lead poisoning from petrol engines depends on the use of leaded fuel), and there is a widespread use in all fields of data that does not apply - for example the use of accident data from the US to justify the introduction of airbags; most Americans do not wear seat belts, and if you don't wear seat belts, airbags look very good, but if you do, the increase in safety is much more marginal.

LPG (or CNG) added to diesels has the ability to BOTH increase power and decrease fuel consumption AND decrease all emissions. Even small additions of LPG to the air significantly improve combustion, giving a power increase while decreasing emissions. Increase the amount of gas without decreasing the diesel gives quite a large increase in power before emissions rise to the levels seen before fumigation. Emissions can be decreased even more by increasing the proportion of gas without increasing power, with the added advantage of cheaper fuel. There is a whole range of mix ratios that will work, and most improve either power, emissions or economy or all three.

Sounds like a win - win situation; and it IS. Until you find out how much it is going to cost! It is unclear why it is so expensive, possibly because there is little competition and not many are done.

John

Some have said that the benefits of the cheaper LPG will soon be void as the price of LPG goes up, my view of this matter is that it won't be void, it will be like adding an extra fuel tank, the fuel may cost more but your still getting greater range, economy and power and creating less emissions as well, so still a win, win for the user.

Baz.

Interestingly, several companies have trialled LPG fumigation on diesels and reported a shortening of life of the vehicle (engine).

Whilst it ran better etc... the overall lifespan was reduced.

Combine this with loss of cargo area, increased weight (tank) and other factors and it becomes interesting.

I've searched for more detailed info, but at this stage have been unable to quantify the reports....

I'm watching this with interest.