80 Series Diesel/Gas Conversion

Submitted: Monday, Aug 08, 2011 at 19:50
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Hi all...
Just considering the merits of getting a Diesel/Gas conversion done on my 1991 80 Series Landcruiser. It has done around 370,000 km, and runs pretty well until it senses a hill. Then it just ambles over at its own pace. It always gets there, but in its own sweet time.

It has responded well to a couple of enhancements, including extractors and a sports exhaust, and I am thinking that the Diesel/Gas conversion may just give it a bit of a lift. According to the propaganda, I may also get a modest increase in fuel efficiency

It does not have a turbo and I am not that keen to fit one given its age, as I am more than impressed with the reliability I have had from it, and have no plans to retire it. I have recently acquired a camper trailer, so a little extra grunt might be helpful.

I would therefore be very happy to hear from anyone who has had a similar conversoin done to a similar vehicle, and their impressions.

Thanks in advance.

Jack

PS. If I could just get rid of the Gt Dividing Range I would not need this.

The hurrieder I go, the behinder I get. (Lewis Carroll-Alice In Wonderland)

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Reply By: Mick O - Monday, Aug 08, 2011 at 20:02

Monday, Aug 08, 2011 at 20:02
I think you'd need to get rid of those stiff easterlies howling down the west coast as well OBJ.

Being familiar with "Ye olde oiler", and knowing one has a very handy tradie in the fam, why wouldn't you consider an overhaul with a turbo and intercooler. I know member Michael J had this done with his troopy of a similar vintage to your 80 and the results were impressive. With No 1 son doing the work (as part payment for years of parental care) it shouldn't be that expensive.

From recollection, the diesel gas will create similar considerations as those you worry about with the turbo, particularly around internal engine pressures and combustion temperatures (may even effect grommet seating).

What about a chip to compliment the extractors and a 3" exhaust. Certainly cheaper than a D/G conversion.

Ahhh retirement. To have the worries you have. I can only dream... ;-)

Cheers Mate

Mick
''We knew from the experience of well-known travelers that the
trip would doubtless be attended with much hardship.''
Richard Maurice - 1903

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Follow Up By: Member - Jack - Monday, Aug 08, 2011 at 20:14

Monday, Aug 08, 2011 at 20:14
Ah, young Michael:

The mechanical son has declared he never wants to work on a car again, and is busy building (or rebuilding) our new Waratah trains, that need a lot of work when the 'finished product' arrives here from China.

Your other options are are under consideration, although I am more inclined to an overhaul and tuneup, but happy to dodge the turbo.

Chip??? Chip???? The only chip in my trusty old steed must have fallen under the seat at my last visit to a Maccas drive-thru. (Note the American 'thru').

All you need to retire is to hang around for a while. It comes naturally after time : )

Great to hear from you. Keep well and stay safe.

Jack


The hurrieder I go, the behinder I get. (Lewis Carroll-Alice In Wonderland)

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Reply By: Drew - Karratha - Monday, Aug 08, 2011 at 20:39

Monday, Aug 08, 2011 at 20:39
Dont waste your money - I had diesel gas fitted to my 80 series - 96 model manual with about 400000k's on it at the time. The increase in power was barely (if at all) noticable. It does increase the range due to the 40l gas tank (you need to relocate the spare to the back bumper to make room - or have the tank taking up room inside the rear... I towed my 5m boat for a few thousand kays and there wasnt a noticable difference over the straight diesel... I have since sold it and bought a 100 series.
After I got the gas I bought 285/75 16 tyres for it, but it struggled to accelerate over 100 (without towing - on flat ground) - I had them for a day and swapped back to 265/75 16's....
If I had my time again I would have spent the money on new big end bearings, re-built the fuel pump, and replaced the injectors (then possibly turbo'd it if I still wasnt happy....

Just enjoy it - I wish I kept mine...

Hope this helps - or at least gives you something to think about

Drew
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Follow Up By: Hairs & Fysh - Monday, Aug 08, 2011 at 21:25

Monday, Aug 08, 2011 at 21:25
Hi Jack,
I tend to agree with Drew.
Not through personal experience, just what I've read on different forums.
I've got a 91 1HD-T and had contemplated putting gas on the old girl. I was told it would only help with fuel economy not more power. With the 1HD-T an inter-cooler would be more of a benefit to me.
Anyway, I reckon your money would be better spent on as Drew said, sticking a turbo on her and replacing the BEB's
Swing on by LCOOL, They be able to point you in the right direction on who to see about the right gear and who would be able to help you with the work to be done.
Hope this is of some help to you.

Jon

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Follow Up By: SelmerVI - Tuesday, Aug 09, 2011 at 13:53

Tuesday, Aug 09, 2011 at 13:53
Hmm, personal experience with 1989 GQ, with turbo and ecoshot gas system - a lot more responsive than before fitting. A noticeable improvemnt - like a second turbo kicking in.

Very happy with it - only hassle is going to two pumps at the servo, but only do that every couple of fills.

Economy on diesel about the same, but on trips am mostly towing.
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Follow Up By: Member - Jack - Tuesday, Aug 09, 2011 at 15:19

Tuesday, Aug 09, 2011 at 15:19
Thank your .. good feedback. I did have a reconditioning phase b uilt into my thinking and this might be the best way to go for me.
Very grateful for all your thoughts and input.
Thank you.
Jack
The hurrieder I go, the behinder I get. (Lewis Carroll-Alice In Wonderland)

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Follow Up By: Hairs & Fysh - Tuesday, Aug 09, 2011 at 15:59

Tuesday, Aug 09, 2011 at 15:59
SelmerVI,
"A noticeable improvemnt - like a second turbo kicking in"
I suppose any assistance on a Patrol would feel like a Second Turbo

Sorry, That just cracked me up.

Jack,
I was talking to the local store owner this morning, he put gas in his 95 non turbo diesel 80 a couple of years ago( never knew he had done that to his 80, I guess I never asked either) Did a bit of touring to the west and back towing a 24 foot van and was happy with the fuel economy he had got from it. He said there wasn't a great deal of noticeable difference in the horsepower side of things, but was happy to of saved a fair bit with better economy when touring. He's driven my 1HD-T 80, and reckons it's got heaps more go than his old girl ever did on gas.
If you were already prepared to do some engine work, yeah might as well get it ready for a turbo. As I mentioned, a few of the fellas on LCOOL have put after market turbos on their old girls with good results.
Don't know if your a member or not, Here is a small writeup on Turbocharging an 80 Series
Another story HZJ80R - Turbo or Not?
Anyway, good luck with it all Jack.



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Reply By: Trev6 - Monday, Aug 08, 2011 at 21:11

Monday, Aug 08, 2011 at 21:11
Thanks in advance.

Jack

PS. If I could just get rid of the Gt Dividing Range I would not need this.



...............And we would score a bit more rain out our way

Trev6
AnswerID: 462141

Reply By: Cruiser .- Tuesday, Aug 09, 2011 at 13:51

Tuesday, Aug 09, 2011 at 13:51
Jack,


Maybe I have misunderstood something but I was under the impression that the diesel/gas kits were only suitable for a computer controlled diesel system, which the 91 cruiser isn't (have had 2)

Can someone please clarify this for me.

Cheers,

Cruiser
AnswerID: 462173

Follow Up By: Member - Jack - Tuesday, Aug 09, 2011 at 15:17

Tuesday, Aug 09, 2011 at 15:17
Hi Cruiser:

I have to go over to the installer this week, so I will ask, however in my initial enquiry, when I told them what model I had, they did not tell me it could not be done. If I find out any different when I go over I shall let you know.

Jack
The hurrieder I go, the behinder I get. (Lewis Carroll-Alice In Wonderland)

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Follow Up By: Drew - Karratha - Tuesday, Aug 09, 2011 at 15:32

Tuesday, Aug 09, 2011 at 15:32
Yes - they are available for the mechanically injected diesel engines
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Follow Up By: SelmerVI - Tuesday, Aug 09, 2011 at 19:30

Tuesday, Aug 09, 2011 at 19:30
Hmm, any help needed - hrrmph!! At least I can keep up with the Toyo's now!!

Anyway, my understanding is that they are intended primarily for a turbo'd engine. Different types of systems then depending on whether electronic or mechanical control.

Not sure if will work in a non-turbo engine - I would put the $$ into a turbo in that case, rather than the gas system.
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Reply By: PeterInSa - Tuesday, Aug 09, 2011 at 23:27

Tuesday, Aug 09, 2011 at 23:27
A friend has an 80 series ute which had a standard Diesel engine. Pulled that out and put in a 12HT Turbo Diesel from a 60 series. This was done some years ago and still going strong.

The 12HT has the larger Tojo Crankshaft etc I am told. The challenge is to find a 12ht engine that has done less than say 200,000km for a change over.

Peter
AnswerID: 462209

Reply By: ross - Wednesday, Aug 10, 2011 at 10:44

Wednesday, Aug 10, 2011 at 10:44
Jack,has your fuel pump ever been rebuilt? They tend to wear out quicker than the engine.
Once the pump begins to lose pressure,overtaking and hills become even harder.

Before you make any decisions,I would get the pump checked (if it hasnt been done) and a compression test.

Ive got a 1HZ in a ute that I was thinking of turboing.Its got 270k on it and I was thinking with minimal boost and a light foot I might get some good miles out it.
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