Diesel gas

Just purchased a new Prado and was considering the conversion but heard you do not get much gain fom new generation engines but would like to hear other opinions.

Hi Paul

Iam yet to be convinced on the diesel gas conversion, would like to hear from anyone who has had it done. Will see how the Prado pulls the camper through the hills first it maybe ok, thanks for your thoughts.

My simplified understanding of Diesel gas systems.

Dieselgas boosts power and improves economy by getting a more complete burn of the available diesel fuel, in the engine.

Current diesel engines only achieve approximately 75% fuel burn, the rest of the fuel exits the engine as soot, unburnt carbon etc.

the addition of small amount of LPG to the combustion chamber promote an almost 99% burn of the diesel fuel, thus you get more power out for less fuel injected.

so you can either go for more power, using the same amount of fuel previously used, or better economy by lifting the foot a little and getting the same power output a previously achieved, and using less fuel.

Dug...diesel fuel does not burn completely that is why there is soot in the exhaust pipe and your engine oil goes black so that adds up to wasted unburned fuel...and you are right to say an increase in power will mean an increase in fuel consumption....however what if you could have a complete burn in the chamber and all the available fuel is burnt and converted to power....then you would use less fuel because all the available fuel is being used...well this is what happens with the introduction of a small addition of auto gas on the combustion process...the gas "lengthens" the burn and all or most of the combustibles are added to the fire and the result is an increase in power but a slight reduction in fuel usage because you don't have to hold the foot down as far for that increase in power you get as a result of a complete burn..the secret is the addition of the gas and the more complete burn....much more efficient burn with the extra power that comes with it.

LOL Nick...we were typing at the same time m8

So improving the fuel air burn mix gives more power for the same fuel or more fuel at the same speed.

It is up to you if you drive for speed or fuel efficiency as usual :-)

Cheers and thanks

Doug

Redbakk,

happens that way sometimes....

D200Dug.

its all to do with the ignition point of the different fuels. LPG as a vapour doesnt ignite until it reaches above about 525 Deg c, thus it can be added it small amounts to the inlet airflow of the diesel engine. All so it is usually added in such small amounts that the "mixture" LPG to O2 ratio is not correct and wont pre ignite.
Diesel on the other hand ignites about 325 deg c, and then starts the LPG burning. The LPG continues to burn and assist the complete combustion of the diesel fuel near the cylinder walls where it is "cooler" and as the piston down stroke continues. This also prevents the engine oil gunking up with soot, or being diluted by diesel fuel "leaking" down the cylinder walls. This then adds to the overall improvements by extending the oil detergant and lubricating life. With proper testing of the oils you may be able to extend your oil and filter service life, and save that way also. Note I said with proper testing though.

Flywest....oil still very dirty as usual or did it clean up a bit.....I don't have gas but my oil gets filthy towing the van with the turbo.

My consumption is lousy too when towing the van.

Royce....keep us posted....very interested in the outcome.

The potential to play the blame game is large but can happen with some gas systems.
Rod Dun of Rods Country Camping gear is getting his F250 Diesel fitted with Gas at the end of November .
It is to be fitted with the New Sequent 2 system designed by Hunter Gas Tech and fitted by J & J Diesel Services near Taree.
It will be dyno tuned and I look forward to Rods remarks after it is done as he tows a massive trailer and covers a lot of distance servicing the show circuit up and down the east coast.
The Sequent 2 system is the most advanced Diesel Gas System available today and the computer module is far more adavanced in monitoring the performance than any other system.

Some people knock diesel gas as a non event but it all relates to your driving habits and if you drive the extra power to get the power the only benefit you will get with economy is in the price of gas in relation to the price of the diesel you would have used.

If you drive for economy there is a definate advantage in both performance and economy.

Ian