Diesel Gas Systems

[slug_burner]

OK what are the advantages and disadvantages of the various diesel gas systems out there.

Diesel on Gas vs

Hunter Sequent II vs

Eco Shot vs Diesel/Gas Australia vs

Green Fuel Systems International (GFSI) vs

DieselGas technologies vs

D-Gas Diesel LPG Enhancement Systems.

Although there is some claim that other inject the gas before the turbo I have yet to find anyone that claims to do that. All appear to inject the gas after the intercooler. I have red here some advocating the Eco Shot and others the Sequent II system. a number of sites have the good old 300 Tdi as one of their conversion successes with the Sequent II system people claiming around a 50% increase in power!! Power yes it would be handy but not at the expense of blowing the motor up. I'd be happy to increase the mileage from every bit of diesel.

What has your experience been? Would you recommend your chosen system to someone else?

[LOVEMYRANGIE]

Just a word of warning with these systems.
I have a client who has just had a Toymota Handbruiser 1HZ and a Patrol with a non turbo Knee Deep42 come in with melted pistons and I do mean melted!!. Both had done under 10,000 k's.
It seems that no one did a dynotune on them after setting them up and happily gave them back to the customers.
I cant say if they were fitted by the same installer, who the installer is or what system it was, but a word of warning to all. Ask the right questions, ask how it is done and see if they can give you any long term references to contact, plus CHECK THEIR WARRANTY INFORMATION.

[p38arover]

Note, Diesel Gas Technologies sell the Hunter Gas Sequent II system for 4WDs.

[slug_burner]

Thanks gents,

I noticed more than one of the listed above do the Sequent II system.

Also the Sequent II system uses and EGT monitor mostlikely to avoid the piston melt, it also monitors the coolant temp and does not use gas until coolant is at 30C or higher. A switch is used to detect if the accelerator is pressed or not as it cuts gas between gears, when coasting and braking. Had a quote to tell me to ring back when the boss was in but a Patrol as a guage would cost $4700.

From what Justin (I think) said the Eco Shot monitors the pressure to add gas as the turbo provides boost.

Nothing else so far.

[martinozcmax]

I can relate my experience. I have a 200Tdi on diesel gas. It is very good on economy. I get around 8.5l per 100 clicks. Not sure about a 50% increase in power I'd suggest maybe 20-25% but that's just anecdotal based on my gut feeling. It is noticeably better. It has been running on this for 2 years plus and the only issue has been a lot less strain on the wallet. :D :D

I can also run on WVO and gas with no probs at all and at $1.40 a litre it's a lot cheaper. I have been advised on here and elsewhere that the reason I can run on bio diesel is because the old Tdi 200 is not electronic and the swirl chamber for the fuel had to be machined quite accurately compared to modern Td5 plus engines which use a microchip to compensate for any tolerance issues with the mechanics.

I change oil and filter every 5,000 k's but that's probably cause I'm a cautious old fart and oil and filter is cheap insurance.

Overall I'd certainly recommend it. Good luck with whatever you decide to do. I'm pretty sure mine adds gas after the turbo.

Regards

Martin

[mark2]

I can relate my experience. I have a 200Tdi on diesel gas. It is very good on economy. I get around 8.5l per 100 clicks. Not sure about a 50% increase in power I'd suggest maybe 20-25% but that's just anecdotal based on my gut feeling. It is noticeably better. It has been running on this for 2 years plus and the only issue has been a lot less strain on the wallet. :D :D

I can also run on WVO and gas with no probs at all and at $1.40 a litre it's a lot cheaper. I have been advised on here and elsewhere that the reason I can run on bio diesel is because the old Tdi 200 is not electronic and the swirl chamber for the fuel had to be machined quite accurately compared to modern Td5 plus engines which use a microchip to compensate for any tolerance issues with the mechanics.

I change oil and filter every 5,000 k's but that's probably cause I'm a cautious old fart and oil and filter is cheap insurance.

Overall I'd certainly recommend it. Good luck with whatever you decide to do. I'm pretty sure mine adds gas after the turbo.

Regards

Martin

Is the 8.5l/100 just the diesel figures? If so, what would be the gas figures?

[slug_burner]

Is the 8.5l/100 just the diesel figures? If so, what would be the gas figures?

The figures quoted for econmy after gas conversion are usually based on the cost ($) of fuel per km travelled converted back to litres/100km of diesel equivalent.

I was pretty certain that I saw a big hp improvement claim

http://www.sequentsystems.com.au/spawner/data/sequentsystems.com.au/137_2.jpg

[rrturboD]

martinozcmax, which system have you fitted?

[farmport]

If that dyno sheet is a 300tdi it needs to be read very carefully. A standard tdi produces up to 80hp when the injectors and pump are in good nick but we have often seen them down around 65hp when the injectors are getting sad and not producing a good spray pattern. Gas has a tendency to overcome these problems by still burning most of the large droplets that result from poor injectors. The result appears to be a massive power increase but in fact if the injectors were serviced the difference would be no where near as much.
Unless hp is quoted as an increase over what would be expected from an average engine with a good serviceable injection system then what you are seeing is a bit of smoke and mirrors.
You might say so what but that particular engine in the dyno sheet could be heading for serious problems. Also even better economy would result from fuel system in good nick.
Before any engine is put on diesel/gas the pump and injectors need to be checked out thoroughly and be serviced if required before the gas system is put on.
Also it is pretty irelevant what the absolute power turns out to be. What is far more important is the result in low to midrange where 99% of operation occurs.

Cheers

[defender 1995]

If that dyno sheet is a 300tdi it needs to be read very carefully. A standard tdi produces up to 80hp when the injectors and pump are in good nick but we have often seen them down around 65hp when the injectors are getting sad and not producing a good spray pattern. Gas has a tendency to overcome these problems by still burning most of the large droplets that result from poor injectors. The result appears to be a massive power increase but in fact if the injectors were serviced the difference would be no where near as much.
Unless hp is quoted as an increase over what would be expected from an average engine with a good serviceable injection system then what you are seeing is a bit of smoke and mirrors.
You might say so what but that particular engine in the dyno sheet could be heading for serious problems. Also even better economy would result from fuel system in good nick.
Before any engine is put on diesel/gas the pump and injectors need to be checked out thoroughly and be serviced if required before the gas system is put on.
Also it is pretty irelevant what the absolute power turns out to be. What is far more important is the result in low to midrange where 99% of operation occurs.

Cheers

80HP IS WHAT THEY WOUND BE PUTTING OUT AT THE FLY WHEEL MOST DYNOS ARE MESURING WHATS AT THE WHEELS HAVE SEEN POWER INCRESES LIKE THESE ALL THE TIME THIS IS NOT AN UNCOMMON THING FOR THE LANDROVER ENGINES THERE IS NOT AS MUTCH OF BIG DIFERENCE FOR LAND CRUISERS ON GAS BUT ALSO IF FITTING ONE OF THESE SYSTEMS AND YOUR VECHILE IS OVER A 2003 MODILE MAKE SHORE IT IS EMISSION CERTIFIED AS AFTER SPENDING OVER $4500 YOU MAY HAVE TO REMOVE IT AS IT DOES NOT COMPLY IT AUSTRALIAN STANDARDS AS1425

[p38arover]

Def 1995, don't shout (use all capitals).

[cooter]

i have been looking into the diesel gas of late and our local installer has warned me off it as it has still not been certified by the rta:o
and there has been a lot of engines go pop
All im looking for is lower egts but im hoping a larger intercooler new injectors more boost and a little bit of head work should overcome this but dgas would have been good

[p38arover]

i have been looking into the diesel gas of late and our local installer has warned me off it as it has still not been certified by the rta:o
and there has been a lot of engines go pop

I'd check with another installer. Maybe your installer hasn't been selected to fit the stuff so he's not willing to suggest another installer. If a lot of engines had blown, I think it would be well publicised by now.

Ring Derek or Murray at Gastek (aka Modern Motors, the ex-LR dealer) in Dungog.