Gas conversions

[Aussie Frontier]

Ok guys
with the onset of ridiculous fuel prices its time to investigate other avenues. I know some of the guys are running gas on the Diesel trucks but has anyone done a gas conversion on a D40 V6 yet?
I asked Nissan when I bought the truck and spoke about Diesel the dipstick selling em the truck went spac and said nissan would revoke warranty if I went gas and blah blah blah. well we all know they are just a waste of oxygen but if anyone can shed some light on Dual FGuel installs then by all means jump in

according to LPG Autogas Australia this is the brake down of the savings figures

Monthly Savings $110
Payback Period 36 months
Annual Savings $1320
Weekly Savings $25
Based on: Annual Km:15000
Petrol Consumption 15L/100km
Cost of petrol/Litre:$1.50
Cost of LPG/Litre:$.70
Conversion Cost $4000
These potential savings are indicative only
based on a range of fuel consumption.

Calculations exclude the benefits of Federal (and State) Government grants (rebate).
LPG Vehicle Scheme

Please note: The LPG Vehicle Scheme customer documents have been updated. These include LPG Vehicle Scheme Application Form, Customer Guidelines; Frequently Asked Questions; Fact Sheets and the Information Sheet for Installers and Dealers.
The latest version of the Application form is February 2008. However, application forms dated January 2007 or later will also be accepted.
The Australian Government has established the LPG Vehicle Scheme to assist private use motorists with the purchase of a new LPG vehicle or the conversion of a new or used petrol or diesel vehicle to LPG. Two different grants are available:

1. A grant of $2,000 will be paid following the LPG conversion of a new or used petrol or diesel motor vehicle.
2. A grant of $1,000 will be paid following the purchase of a new motor vehicle with an LPG unit fitted at the time of manufacture of the vehicle.The grants are available to registered owners of a new vehicle with an LPG unit fitted at the time of manufacture of the vehicle or registered owners who have a new or used petrol or diesel vehicle converted to LPG on or after 14 August 2006.

The vehicle must be registered in your name at the time of LPG conversion, or for new cars, at the time you purchased your new LPG vehicle
An eligible vehicle:

• Is for private use (not commercial or business use)
• Is a passenger or light commercial vehicle less than 3.5 tonnes Gross Vehicle Mass
• Must be registered in the Australian state or territory of residence of claimant
• Is not subject to a novated lease or salary sacrifice arrangement
• Must be registered for private use in NSW, VIC, QLD, WA, and the ACT
• Must be declared for private use if registered in SA, TAS and NT
• must have been converted or purchased within the last 12 months.

ok so all things being roughly correct will mean that at current prices it would be say 18 months to break even so to speak if you took the initial price as $4000 and you got the $2000 back from the gov.

[raceworx]

Originally Posted by Aussie Frontier

Ok guys
with the onset of ridiculous fuel prices its time to investigate other avenues. I know some of the guys are running gas on the Diesel trucks but has anyone done a gas conversion on a D40 V6 yet?
I asked Nissan when I bought the truck and spoke about Diesel the dipstick selling em the truck went spac and said nissan would revoke warranty if I went gas and blah blah blah. well we all know they are just a waste of oxygen but if anyone can shed some light on Dual FGuel installs then by all means jump in

according to LPG Autogas Australia this is the brake down of the savings figures

Monthly Savings $110
Payback Period 36 months
Annual Savings $1320
Weekly Savings $25
Based on: Annual Km:15000
Petrol Consumption 15L/100km
Cost of petrol/Litre:$1.50
Cost of LPG/Litre:$.70
Conversion Cost $4000
These potential savings are indicative only
based on a range of fuel consumption.

Calculations exclude the benefits of Federal (and State) Government grants (rebate).
LPG Vehicle Scheme

Please note: The LPG Vehicle Scheme customer documents have been updated. These include LPG Vehicle Scheme Application Form, Customer Guidelines; Frequently Asked Questions; Fact Sheets and the Information Sheet for Installers and Dealers.
The latest version of the Application form is February 2008. However, application forms dated January 2007 or later will also be accepted.
The Australian Government has established the LPG Vehicle Scheme to assist private use motorists with the purchase of a new LPG vehicle or the conversion of a new or used petrol or diesel vehicle to LPG. Two different grants are available:

1. A grant of $2,000 will be paid following the LPG conversion of a new or used petrol or diesel motor vehicle.
2. A grant of $1,000 will be paid following the purchase of a new motor vehicle with an LPG unit fitted at the time of manufacture of the vehicle.The grants are available to registered owners of a new vehicle with an LPG unit fitted at the time of manufacture of the vehicle or registered owners who have a new or used petrol or diesel vehicle converted to LPG on or after 14 August 2006.

The vehicle must be registered in your name at the time of LPG conversion, or for new cars, at the time you purchased your new LPG vehicle
An eligible vehicle:

• Is for private use (not commercial or business use)
• Is a passenger or light commercial vehicle less than 3.5 tonnes Gross Vehicle Mass
• Must be registered in the Australian state or territory of residence of claimant
• Is not subject to a novated lease or salary sacrifice arrangement
• Must be registered for private use in NSW, VIC, QLD, WA, and the ACT
• Must be declared for private use if registered in SA, TAS and NT
• must have been converted or purchased within the last 12 months.

ok so all things being roughly correct will mean that at current prices it would be say 18 months to break even so to speak if you took the initial price as $4000 and you got the $2000 back from the gov.

Yeah but the tank is so big...

[Aussie Frontier]

True
but damm thas a lotta BBQ's

[Martin from Downunder]

I'm going for it and I have ordered the Tank last week and the Kit this week , I'll do most of the fittings and the a mate that has his LPG ticket is going to finish it off.
My main problem I dont have any room underneath so the tank will have to go in the back taking up the space where my air tank and jump batteries are at the moment the rest is straight forward well sort of.LOL

[Aussie Frontier]

Now if only we could get a suplimental gas system like the diesels then I would be all for it .

What about putting the gas tank where the spare tyre is and putting that on the top of the canopy?

[Tweak'e]

Originally Posted by Aussie Frontier

Now if only we could get a suplimental gas system like the diesels then I would be all for it .........

i heard years ago of someone accidentally doing that. their car ran fantastic. no idea on economy tho.

i worked out a rough way of doing it, in theory. basically poor enough LPG in to run at idle/cruise but let the stock ecu add petrol to maintain A/R. so the more throttle you gave it the more petrol it added. that gives a situation of mostly LPG at cruise but mostly petrol at full throttle. both fuels are used to their strengths, LPG at cruise for economy but petrol at full throttle for power.
catch...timing. both fuels require different timing and the mix changes the timing also. had no idea how to change the timing according to the LPG/petrol ratio.

[Martin from Downunder]

Aussie, I have looked everywhere ,where I could mount the tank they say you need 25 to 30% LGP to Diesel and as my tank is 150L a +30L tank would suit me fine as the is no place in Wisemans Ferry where I can fill up with gas ggggrrrrrrrr. I settled for a usable 50L tank 300x960mm tank , trade on that was $396 I could have gone two small tanks 25L as these are much smaller BUT they cost more
As we all know (or most do) a Diesel engine is only 70 to 75% efficient meaning that only 70% of fuel gets burned the rest goes out the pipe wasted unburned fuel or in simpler terms every 5L going through your engine 1L of unburned furl is lost, the way that the gas system works is that it adds a small amount of gas to the intake and due to its volatility it completes the burn and in turn giving you a 100% diesel burn, what will this do to the engine? well nothing it is designed to operate at 100% but what you get is more HP from your engine at no extra work from it more power =less boot =better economy and the way fuel fuel prices seem to go up and up just about every day, if you have the $$$ would well be worth doing

Having spoken to the tech the other day, the std jet is 50 , he said now if you added a chip and up the jet size you would get some real power from your vehicle but the down side is that the economy would be up the S%$#
I have decided to run the module and just have it on gas, I guess time will tell if that was the right way to go or not

Will keep you all posted on the sett up ect pictures where and how it was all mounted. I will do some dyno runs and see just what us diesel drivers have been missing out on.
I hope to have the system up and running in about 4 weeks or so waiting on parts is always a problem.

This is the email I received from them
Some of the advantages of the D-GAS System over the opposition:

1) Injection of LPG AT THE MANIFOLD. A TRUE INJECTION SYSTEM which is pressurised to overcome turbo boost pressure at a RISING RATE. We don’t go near your turbo charger

and therefore D-GAS won’t damage them or engines. (one of the largest truck fleet operator in Australia is soon to run their fleet on the D-GAS System for this reason alone) This means that as you drive the system adjusts the mixture to compensate for the harder or lighter driving styles. Our system does not fumigate the intake through a ONE SIZE FITS ALL VENTURI but injects at the manifold. More than ever now, buyers are asking for this very feature. With Non turbo engines. The D-GAS System makes progressive delivery of LPG possible through a 2 stage injection process. The primary port injects LPG at around 1000 RPM’s. The secondary injection occurs at around 2000 RPM.

2) Liquid draw from cylinder.Under conditions such as rough roads or steep inclines etc vapour draw systems have the ability to pick up liquid, not vapour. This full suction, or “splash”, of liquid into the pickup can take your engine past its design limits by potentially extremely over gassing your engine causing it to detonate, blow a head gasket or have a turbo blade failure. This has in fact happened many times. With D-GAS however, this cannot ever happen. We stand proud of the fact that we have never blown an engine or turbo or any other parts.

3) Ease of tuning. No software calibration or programming by installer.
At the end of a hard day the last thing you the installer wants to do is sit and look at a laptop and spend another 2 hours tuning a vehicle. The D-GAS System fully regulates the delivery of LPG automatically. All you need to do is fit the factory supplied jets to fine tune the vehicle! The D-GAS controller does the rest ... from sea level to high altitudes.

4) System injects LPG proportionally to your driving style. The harder you drive it the more it injects, the easier you drive it the less LPG it uses.

5) No Gassing at idle conditions.
This is not just a function of insufficient air being drawn in by the engine or turbo, our system literally shuts off. This built-in safety feature also works to save LPG when it’s not needed. ie when sitting at a set of lights.

6) No Manual Switching or User Intervention Required.
With some systems, the owner is asked to switch off the system during city driving. This is simple an out of date system as drivers can forget to turn off the system and then risk damaging their engine. The D-GAS System is “set and forget” as it never needs to be turned off. The System automatically adapts to both city and highway driving modes.

7) Power Chips
The D-GAS will work with all current chips on the market however we have found that the diesel pump will provide the most fuel savings when power chips are backed off somewhat. Most “chips” in fact will allow you to turn down the diesel pumps by a significant amount thereby saving you even more fuel

[Tweak'e]

pity they shut off at idle. the later systems now run even at idle to gain fuel economy.

actually i find the info you have mention doesn't line up with what the advertise on the web. mayby they have a new system out ??

[Aussie Frontier]

well with all the technology we have today surely someone could work it out for us.
Oh wait that would mean we useless petrol so that would be bad.

[Martin from Downunder]

Originally Posted by Tweak'e

pity they shut off at idle. the later systems now run even at idle to gain fuel economy.

When you say Later systems, what systems or manufactures are you talking about?