Added gas to my diesel turbo cruiser

Submitted: Monday, Sep 11, 2006 at 06:46
ThreadID: 37618 Views:4149 Replies:8 FollowUps:27
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I've just had gas fitted to my Toyota cruiser turbo diesel, now I can run on diesel and gas. So far, no figures on economy but supposed to be exceptional, but the power is very noticeable, should go very well pulling the caravan.
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Reply By: PK Eildon (VIC) - Monday, Sep 11, 2006 at 07:33

Monday, Sep 11, 2006 at 07:33
Bill

Congrats. Had mine on a Patrol for about 5 months. Economy is there, but would not say exceptional. Think you just replace 20-25% diesel use with gas which is cheaper. Also with the power & torque I tend to use it.
Have you noticed any difference in quietness of motor at speed.

PK
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Follow Up By: Member - bill - Monday, Sep 11, 2006 at 08:11

Monday, Sep 11, 2006 at 08:11
Yes, the motor is very quiet & powerful.......
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Follow Up By: fisho64 - Monday, Sep 11, 2006 at 10:41

Monday, Sep 11, 2006 at 10:41
that doesnt seem to be much of a saving? If it takes 2 years to recoup a petrol/lpg at 100% wouldnt it take 8 years at 25%?
Is extra power the motivation for installing it??
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Follow Up By: PK Eildon (VIC) - Monday, Sep 11, 2006 at 11:24

Monday, Sep 11, 2006 at 11:24
Fisho64

Using round figures of $1.50 Diesel and $0.50c gas, even on my conservative figures, a fill for me is 180l diesel + 55l gas = 235l fuel. If I was only on diesel = c.$352.00 per fill. Diesel/Gas = c.$297.00 a saving of c.$55 per fill. The $2000 outlay is recouped in about 37 fills. Doesn't seem to bad to me. I'm sure there are some power/weight savings, so this figure would more likely improve.

and yes, for me, the improvements on gas would be sufficient motivation. Savings are a bonus.

PK
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Follow Up By: fisho64 - Monday, Sep 11, 2006 at 12:39

Monday, Sep 11, 2006 at 12:39
You could be right of course as I am not to familiar with these systems, but does 1 litre of gas equal 1 litre of diesel?
My simple calcs go like this.
235 litres @ 12litres/100km equals (roughly)2000 km
2000km times 37 fills = 72000km. Average car does I think 15000km a year makes around 5 years. Assuming there are no problems with the system?

that is assuming 1 for 1 diesel to LPG.
But if petrol conversion is 10% to 20% less against LPG and diesel is more thermally efficient that petrol (hence less consumed for equivalent petrol/effort) then I cant see that it is going to be 1 for 1.

Not knocking it though, just curious about the figures?
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Follow Up By: PK Eildon (VIC) - Monday, Sep 11, 2006 at 13:59

Monday, Sep 11, 2006 at 13:59
fisho64

Mine goes more like 235l @ 17/100 (it's a 4.2) = 1382km x 37 fills = 51134 = a bit over a year for me.

I am no mechanical technician (perhaps someone else can help), but my understanding is:

Firstly, Diesel/Gas & Petrol/Gas are 2 different animals.

With diesel the gas is effectively an addative injected into the air flow. 0% at idle - 30% (?) max load. The motor itself is untouched and always operating on diesel. If you run out of gas, no problem, you just loose the benefits which are:
20%+ increase in HP
20%+ increase in torque
Torque comes in 500-600rpm lower
20-25% less diesel use
Motor and turbo run quiter under load
Motor subjected to less carbon & soot; oil stays cleaner

Normally a diesel burns approx. 85% of fuel in cylinder and is still burning as it enters exhaust. Gas ignites after the initial diesel flare (diesel ignites 385c, and gas ignites 500c) giving a final burn to the fuel, which is now more spent leaving the cylinder. There is a marginal decrease in EGT for this reason.

Effectively the mix (not either or) gives you more effective bang for your buck.

I have had mine for 5 months, and believe the mix gives gas better than 1 to 1 in the final fuel use outcome.

I tend to use the the power, but sure if you drove for economy, it may be far more significant than for me.

PK
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Follow Up By: Ozboc - Monday, Sep 11, 2006 at 19:34

Monday, Sep 11, 2006 at 19:34
should i point out there is no excise on lpg at the moment ---- but it will be implemented by 2011? ( from memory )

that will more than likely bring it in line with Petrol prices and hardly worth the conversion cost , that is if the gov does not pull the LPG conversion rebate before then .....

Boc
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Follow Up By: babs - Monday, Sep 11, 2006 at 21:19

Monday, Sep 11, 2006 at 21:19
Hi guys, when I first read about someone putting gas on a diesel I thought it was a joke, I had no idea it could be done, now I'm curious especially that you get more power. Could you clarify a few things for me please?

Q: Is the extra power very noticeable and worth the money?

Q: Is it dual fuel or is the diesal always running through the engine and the gas at the same time?

Q: Is there any long term damage to the engine? (Running the dry fuel)

Q: is there any common problems you encounter once installed?

Mine is a GUIV 4.2 Turbo Diesel Patrol.
Any light on the subject would be greatly appreciated.

Cheers,
Babs.
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Follow Up By: PK Eildon (VIC) - Monday, Sep 11, 2006 at 22:56

Monday, Sep 11, 2006 at 22:56
Ozboc

Everyone loves a pessimist :)

I think I may have traded the vehicle by then, and the world as we know it will have ended.
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Follow Up By: Member - JohnR (Vic)&Moses - Monday, Sep 11, 2006 at 22:57

Monday, Sep 11, 2006 at 22:57
Babs, I have seen figures of 73% efficiency of a diesel engine on diesel along boosted to 93% or there abouts with gas injection. Earler gas sytems were crude with a bbq jet firing into the air inlet.

Your questions,
Q: Is the extra power very noticeable and worth the money? Others can answer that but a lot cheaper than some upgrades with the Fedearl Government help

Q: Is it dual fuel or is the diesal always running through the engine and the gas at the same time? Diesel is in there all the time, gas some times

Q: Is there any long term damage to the engine? (Running the dry fuel) Depends on the gas/diesel ration I think. Where there is a replacement YES, probable danger

Q: is there any common problems you encounter once installed? Others to answer
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Follow Up By: PK Eildon (VIC) - Monday, Sep 11, 2006 at 23:06

Monday, Sep 11, 2006 at 23:06
babs

Q: Is the extra power very noticeable and worth the money?

Mine goes from 84kw at rear wheels off gas to 103kw on gas. Yes it is noticeable.

Q: Is it dual fuel or is the diesal always running through the engine and the gas at the same time?

Gas is additive to air intake, see description above. Motor still runs as diesel, and there are no alterations to the motor. Can run with or without gas, and there is a switch to turn it on or off. You just loose any benefits with it off.

Q: Is there any long term damage to the engine? (Running the dry fuel)

Don't know, been alright for 5 months. As per previous answer, diesel/gas and petrol/gas are different animals. There is no 'dry fuel' as at maximum still 70% diesel in the mix which is ample lubrication.

Q: is there any common problems you encounter once installed?

I haven't found any with the system. A few minor installer problems still not resolved.
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Follow Up By: babs - Monday, Sep 11, 2006 at 23:34

Monday, Sep 11, 2006 at 23:34
Thank you to those of you who replied i appreciate the information, one more question though do you, loose the original power when running on on diesal only once engine has been converted compared to when the vehicle was a diesal only fuel (original).
Not sure if I understand that myself. Ill try again.

Standard diesal eg. 118 kw VS gas converted diesal running on diesal only ?kW
Note: not looking for the kW statistics just the comparison of loss of power if any.

Thanks again,
Babs.
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Follow Up By: Member - bill - Tuesday, Sep 12, 2006 at 05:05

Tuesday, Sep 12, 2006 at 05:05
To everyone with all of your inquiries,& hasn't there been a lot of views, I wish I could name the company that does the fitout to help with your correct answers but.................
Anyway, here's a hint, just type dieselgas into google.
More info can be found by typing autogas.
Pictures and answers all there, just click on the links on the left.
regards Bill
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Follow Up By: PK Eildon (VIC) - Tuesday, Sep 12, 2006 at 08:58

Tuesday, Sep 12, 2006 at 08:58
babs

Read through previous. There is NO alteration to motor as such. It runs as a diesel all the time. Gas is merely injected into air intake. If no gas you just loose the benefits of it and it runs as original diesel. When it is on gas you do not have to depress accelerator as much to achieve same power. Hope that makes sense.

PK
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Follow Up By: PhilZD30Patrol - Tuesday, Sep 12, 2006 at 13:11

Tuesday, Sep 12, 2006 at 13:11
Hello PK

Just wondered what engine you had in your Patrol, is it a 4cyl TD ZD30?

Also wondered how much space did the gas installation need and did it intrude into the space where a 2nd battery would be installed on the passenger side?

regards
Phil
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Follow Up By: PK Eildon (VIC) - Tuesday, Sep 12, 2006 at 15:59

Tuesday, Sep 12, 2006 at 15:59
2003 4.2 turbo intercooled cab chassis

The installation in engine bay is basically a small gas regulator and pipe into air intake in front of turbo. A few sensors. Takes up bugger all room. No interferce to 2nd baddery area.
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Reply By: Big Woody - Monday, Sep 11, 2006 at 07:55

Monday, Sep 11, 2006 at 07:55
Hi Bill,

Can I ask what $$$ you paid for your conversion and where you had it fitted??

Also did you sacrifice the rear tank and fit the gas tank under the rear???
I have heard on the 100 series that theycan fit a small diameter gas tank beside the chassis rails under the middle of the car.

I would be very interested on you fuel consumption figures when you have them available.

Regards,
Brett
AnswerID: 193927

Follow Up By: Member - bill - Monday, Sep 11, 2006 at 08:15

Monday, Sep 11, 2006 at 08:15
I paid $3,982 including gst, minus $2,000 Government rebate due to us in October.
I had it fitted by Dieselgas Tecnologies at Kingswood NSW.
Nothing was sacrificed, it is pouring rain here, I will take some photos when the the rains finished & endeavour to load them onto site for you.
So far, I am very, very happy.
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Follow Up By: Big Woody - Monday, Sep 11, 2006 at 08:21

Monday, Sep 11, 2006 at 08:21
Thanks Bill,

Look forward to seeing the pics.

Brett
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Follow Up By: phil - Monday, Sep 11, 2006 at 14:44

Monday, Sep 11, 2006 at 14:44
Bill,

Is that $2000 rebate the one recently announced for LPG conversions?
I was wondering if it applied to diesel-gas. Seems that it does.
Makes it look a good deal.

Phil I
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Follow Up By: Member - bill - Monday, Sep 11, 2006 at 15:44

Monday, Sep 11, 2006 at 15:44
g'day Phil, yes the Government rebate does apply to diesel-gas conversions as well.

regards Bill
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Reply By: Joombi - Monday, Sep 11, 2006 at 08:40

Monday, Sep 11, 2006 at 08:40
Thats great Bill, I will keep my eye on this post & see if any body out there has fitted gas to a TD 80 series, will hopefully get it fitted to mine by the end of the year...
Rick....
AnswerID: 193933

Reply By: Twinkles - Monday, Sep 11, 2006 at 12:02

Monday, Sep 11, 2006 at 12:02
Has anyone done a 3ltr turbo Hilux motor? Where do they put the gas tank in a dual cab?
AnswerID: 193964

Reply By: Member - Duncs - Monday, Sep 11, 2006 at 17:13

Monday, Sep 11, 2006 at 17:13
I was sent a copy of an article about this subject through work recently.

Refrigerated Roadways have fitted this system to two f their trucks running Sydney to Brisbane. They are claiming 8.77c per kilometre saving over running on diesel alone. That is a big saving.

In addition they think they may be able to extedn the service interval and are claiming environmental savings as well (Euro 3 compliance).

I figured that on the Patrol my fuel figures were about 10% of the big truck so I should get about 10% of the saving. That would not be viable because it would take too long to recoup the savings.

Like others I will be interested to see any actual figures from a 4WD, particularly a 4.2 turbo diesel.

Watching with interest.

Duncs
AnswerID: 193997

Follow Up By: Member - Stephen (WA) - Thursday, Sep 14, 2006 at 01:22

Thursday, Sep 14, 2006 at 01:22
Duncs,

As you know, I have a 4.2 litre, aftermarket turbo diesel, bundle of fun.

I'm having a DieselGas installation done at the moment (dropped the 'cruiser off this afternoon). I should get it back on Sat.

I'll let you know how it goes after a little while.

I hope you and the family are well.

Cheers
Stephen J.
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Follow Up By: Member - Duncs - Thursday, Sep 14, 2006 at 18:52

Thursday, Sep 14, 2006 at 18:52
Thanks for that Stephen. I'll look forward to hearing from you.

Trust all your girls are well.

We are all well. Rachel has landed a part time job in the dining room at the Demo to supliment her phone and shopping habit. She seems to be coping OK with the HSC. Lois is still part time at BHHS. The rest of us are still plodding along just fine.

Hoping to get to Tib for the Rodeo on the long weekend. Then going to spend a few days by Coopers Creek. I need a rest

Still remember what I was doing when you took that photo.

Duncs
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Reply By: Member - andrew B (Kununurra) - Monday, Sep 11, 2006 at 20:55

Monday, Sep 11, 2006 at 20:55
Gday all

Love these threads, as I'm booked in at xmas for the conversion. I agree that it takes a long time to recoup the cash, but it will cost me under a grand in WA, as the state gov throws in a grand along with the fed's 2. I justify it in the following way:

Extra 250km range,
AnswerID: 194038

Follow Up By: Member - andrew B (Kununurra) - Monday, Sep 11, 2006 at 21:02

Monday, Sep 11, 2006 at 21:02
just learn't something - this site doesn't like the tab key, or at least watch where it sends the curser.

extra 250km range, LR tank cost $700.00
extra 20% power Chip cost $1500.00

At this rate I will be about $1300.00 in front AND I'll be saving money in economy gained. It will be interesting on the economy and oil clenliness etc. I have a spreadsheet with quite a few entries on a 400km trip I do regularly, and i just changed the oil today so I'll check the color of the dipstik after the 400 k trip in a week.

Will post and brag when I get It done...

Cheers Andrew

PS tho only hasstle I see is filling with diesel, paying, then driving to the gas pump to fill, then pay. Won't be a problem ath the local (I'll just fill at both then pay), but could be a pain when out of town.

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Reply By: PhilZD30Patrol - Tuesday, Sep 12, 2006 at 09:03

Tuesday, Sep 12, 2006 at 09:03
Hi

Surely the most important issue, and one that 4wders are often (unfairly?) accused of ignoring, is the impact of burning fossil fuels and the survival of civilisation as we know it.

See the www.dieselongas web site for more information and do a search on Ask Jeeves to get current info from the UK and Europe about the advantages of diesel / gas dual fuel.

The way I see it, with my limited scientific expertise, if diesel combustion efficiency is increased from about 80% to 95% by LPG fumigation and less of both types of fuel is burnt per kilometre, then fossil fuels usage and exhaust emissions must be lower per kilometre travelled.

Surely this is a win win situation for everyone?

When I get my ZD30 Patrol running of diesel / LPG dual fuel I may save a dollar or two with a bit of luck.

regards
Phil
AnswerID: 194100

Follow Up By: Bonz (Vic) - Sunday, Sep 17, 2006 at 10:21

Sunday, Sep 17, 2006 at 10:21
mmmm Interested to see how you go Phil
.
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Reply By: Duofuel DieselonGas - Tuesday, Sep 12, 2006 at 23:40

Tuesday, Sep 12, 2006 at 23:40
Hello to you all, just to let you know there is a lot of miscommunication regarding the conversion of a Diesel engine to dual fuel Diesel LPG.

If you check my website, you will see what is possible. I personally drive a Prado 2003 model turbo diesel, and it was a battle to get it to work, however my colleagues managed to get it right, similar to the Hilux/Triton/Rodeo which all have common rail engines, and for the currrent Pajero which performs really well as does the 100 series Landcruiser.

we are achieving substitution rates of up to 60% in highway driving, with upto 50% increase in mid range torque.

To correct some basic facts, replacing diesel with LPG will not extend your range, basic chemical engineering etc will tell you that there is more energy in a kilogram of Diesel than there is in LPG, so a litre for litre substitution will yield less effort not more, ie less distance travelled. Also, a Diesel engine is very efficient, and claims of unburnt fuel combusting in the exhaust is rather scary - I do not want to behind a flamethrower - do you? imagine all of the smog!

You do need to replace a significant proportion of Diesel with LPG to get a decent result in terms of cost savings, which we can do, and our tests show that with the increased thermal efficiency (use of the combustion heat rather than quantity of fuel) only a small (say 5-8%) increase in volume of fuel results, which when offset against the price differential between diesel and LPG, results in a economic saving to the user.

Also, you do not want more power in the engine, one it results in increased fuel usage and secondly, LPG will increase engine temperatures, and as such, when under heavy load, you do not want LPG in the engine, thats how you get wear and damage. Our system actively monitors the boost pressure from the turbo to ensure we do not overfuel or overpower(overheat) the engine.

We do however give you more mid range torque, but do not increase the engine's power output.

we also have other products that complement our dual fuel system,

I hope this helps

Regards

Ben Hodgson
www.alternativeengine.com

AnswerID: 194247

Follow Up By: _gmd_pps - Thursday, Sep 14, 2006 at 03:45

Thursday, Sep 14, 2006 at 03:45
Ben,

as an expert on that subject you may be able to answer the question:
How does your system work and deal with power modifications on
larger engines e.g. a reprogrammed engine with higher boost ?
From what you are saying I read that with higher boost the gas component
is reduced ? I am only interested in the gas conversion for cleaner burn and less soot in the engine... power or economy is not really a worry to me ...
I would like to extend service intervals (oil changes) and from what I read
that should be possible with the conversion, but I do not want to make
the power tunes obsolete, not that I am using them all the time but on occasions.

thanks
gmd
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Follow Up By: Member - John R (NSW) - Thursday, Sep 14, 2006 at 08:23

Thursday, Sep 14, 2006 at 08:23
Gidday Ben,

Thanks for your informative response. I have the same vehicle as you (05 Prado). You wrote that you had some difficulties getting it to run correctly. Would that be a result of the indirect injection setup? Can you explain what difficulties one might expect in getting it right?

Thanks in advance.
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Follow Up By: Duofuel DieselonGas - Thursday, Sep 14, 2006 at 11:06

Thursday, Sep 14, 2006 at 11:06
Hello,

regarding the Prado, we seem to have solved the problem, and we are currently testing it today, but already it drives much better - will updaye tommorrow on this subject.

In regards to cleaner burn - yes the gas does case a higher combustion temperature, and as such less residue is left in the engine, and ove rtime, older deposits will disappear, leading to a cleaner engine overall, and then your oil will last longer etc. As to other servicing items, I cannot give you guidance on that.

Thanks,

Ben Hodgson
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Follow Up By: _gmd_pps - Thursday, Sep 14, 2006 at 12:32

Thursday, Sep 14, 2006 at 12:32
Thanks Ben,

it's just the oil I am after not other service items.
What about power mods and gas ?
regards
gmd
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