SGH
Member Since: 21 Dec 2009
Location: Hellingly. East Sussex.
Posts: 404
  
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Any one here have Lpg on a V8 ?
All comments good and bad appreciated.
Simon TONGA GREEN D3-HSE with a few mods - Now gone 
2.2 D2 130 HCPU due to arrive 1/3/12 
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 Sat May 01 2010 10:43am |
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Navigator
Member Since: 17 Mar 2010
Location: GM1VBE on www.aprs.fi
Posts: 2020
 
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I had a D1 V8 with LPG for 10 years. No problems running it at all. Had tanks under floor and kept normal petrol tank, so no loss of load space, and could use petrol as normal if LPG refilling wasn't available where I travelled. Only noticed a slight decrease in power if going up 1:7 hill with 2 ton trailer. I had to change vehicle only because of accident damage and could not find a D3 V8, or I'd be driving about in one now that you could come and look at! 
Land Rover - Making mechanics out of drivers since 1948.
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| Sat May 01 2010 11:09am |
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SGH
Member Since: 21 Dec 2009
Location: Hellingly. East Sussex.
Posts: 404
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Thanks for the info.
It's not for me as mine is a TDV6 but a friend has a G4 V8 and was either thinking of selling due to fuel consumption
or converting to LPG.
Simon TONGA GREEN D3-HSE with a few mods - Now gone
2.2 D2 130 HCPU due to arrive 1/3/12
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| Sat May 01 2010 1:54pm |
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gtrhaggart
Member Since: 15 Nov 2009
Location: cambs
Posts: 87
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I look after 2 ffrr with lpg. Slight power loss is not noticable unless towing heavy. As long as the engine is warmed up and shut down on petrol it should not be a problem.
I personally prefer my remapped tdv6 to my mates v8 d3.
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| Sat May 01 2010 6:54pm |
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4-Tech
Member Since: 08 Dec 2009
Location: None
Posts: 108
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Quote:I look after 2 ffrr with lpg. Slight power loss is not noticable unless towing heavy.
If converted correctly there should be no discernible difference on LPG compared to petrol. Unfortunately many conversions use equipment that is ill suited to the engine. Any fuelling defficiencies on modern engines will cause faults and thus illuminate the Mil.
Quote:As long as the engine is warmed up and shut down on petrol it should not be a problem.
All sequential systems automatically switch to LPG once engine is warm, there is no requirement to switch back to petrol before turning engine off.
Unfortunately when it comes to LPG there are a lot of people who know very little and then make assumptions based on their poor knowledge. Personally I`ve been converting for 13 years and importing and distributing equipment for 11 of those years.
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| Sat May 01 2010 7:11pm |
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character
Member Since: 01 Jan 2008
Location: wiltshire
Posts: 4184
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meeeow 
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| Sat May 01 2010 11:35pm |
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hids4u
Site Sponsor
Member Since: 12 Apr 2009
Location: Leeds
Posts: 713
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I have had a 2006 V8 converted and couldnt get rid of the engine check light
All down to quality of injectors and setting up!
But after buying a brand new V8 in sept i decided against doing it due to the issues with warranty and also learning that the jaguar engines have soft valves and LPG being dry and running high temp will wear out valves in 60K unless you get the lube system
There is only one guy i will trust to do it and he is on this forum - will find his details and post later
R
Ian
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| Sun May 02 2010 9:08am |
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gtrhaggart
Member Since: 15 Nov 2009
Location: cambs
Posts: 87
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Shutting down on petrol is not a requirement but my customers want their engines to last. Waking up the petrol system before shut down ensures that the additives present in petrol but not lpg are in place before the next turn of the key.
I am sure someone will see fit to call me an idiot again and i suppose 18 years experience just isnt enough.
I will stick to the lpg converter i have been using for the last 6 years for my customers.
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| Sun May 02 2010 10:59am |
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4-Tech
Member Since: 08 Dec 2009
Location: None
Posts: 108
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If on an engine with `soft` valves the conversion has a proper, electronic, valve protection system fitted then the valves are properly protected at all times.The system we fit injects the fluid to protect the valves in through the LPG injecors into each cylinder.
Just to put the record straight I`m not calling anyone an idiot, just pointing out my personal record and offering genuine advice, gtrhaggart you appear on here as a normal member so I can only assume and advise.... unless you are `in the trade` in which case perhaps you should consider becoming a site sponsor so you can post in your own right 
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| Sun May 02 2010 5:24pm |
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The Duck
Member Since: 15 May 2010
Location: Cleveland
Posts: 2
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I own a G4 V8 and had it converted a year ago, I was told that I will get the engine management light on untill the engine got used to the Gas, I took the disco back to the LPG installer after a month so he could check if everything had settled down, It had, but as I had been to landrover in the mean time(suspension fault) he could not turn the light off because he could not access the Disco's computer, I had to go back to Landrover so as they could turn the light off,No problems & as Gas is half the price of petrol, I think it has been money well spent. I also got a suprise when I went to change the V5 to duel fuel, The Road Tax is £200 
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| Sat May 15 2010 10:50pm |
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countrywide
Member Since: 16 Sep 2007
Location: Sunny South Coast
Posts: 4737
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I had a LPG car for a few years with a Prins sequential system. I also added the lube kit, just as a precaution.
Never had any issue's with the engine light coming on or anything like that. But it does require proper installation and more importantly decent set up & servicing.
In my opinion running a car on LPG caused less wear as the oil stays so clean.
If I had a V8, I would have LPG
My family in Holland are starting to use LPG from cold with a new system, rather than having to start on petrol. Please support Hearing Dogs for the Deaf. They make a difference.
http://www.hearingdogs.org.uk
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| Sun May 16 2010 7:12am |
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raftrey
Member Since: 29 Oct 2006
Location: wigan
Posts: 59
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Switching back to petrol momentarily before shutdown will have as much effect on the valve life as telling them a short bedtime story.
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| Sun May 16 2010 10:27am |
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Roel
Member Since: 16 Aug 2008
Location: Somewhere east off Germany
Posts: 1201
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I drive a lot and am/was thinking about a LPG installation. I still didn't do it. By now the system would be paid back already.
The road tax system in The Netherlands is changing so I am not sure what to do now. I may have a system later. The only draw back is where to have the tank fitted. For me it would probably be where the spare tyre is currently and have the spare tyre on the roof. But then I loose roofrack space when on holiday. I don't want the spare on the back.
I had 2 LPG converted cars before a 1979 Toyota Landcruiser 4.2 ltr 6-cyl and a 90 with a RR V8. Both started on LPG with no bad effects. Only when it was really cold I had to drive carefully the first Km's in the toyota otherwise the vapouriser frooze up. Roel
1997 Camel Trophy Disco ex-P101JWK (traded it for a Britains 42101)
1984 90 TD5
2005 G4 Disco 3 BN55WPT
Also member of club MTR
and Club Faultmate
Interested in my 4x4 history see my website: www.mudmachine.webklik.nl
Sorry it's in Dutch and with google translator it gets funny.
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| Sun May 16 2010 10:18pm |
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MikeS
Member Since: 27 Jul 2007
Location: Melbourne, Oztralia
Posts: 81
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My G4 RRS hs been converted to LPG (done before I bought it) and I'm fairly happy with it. It still throws the EML on occasionally, usually if I get stuck in traffic after a long motorway run or if I'm just pottering about town. Having had it back to the installer to be set up a few months back and having him explain the conversion, I now know I could have it so the light doesn't come on, I just wasn't convinced of the solution...
I do ~30k miles a year, so the running cost of the old fart gas makes it worth having 
Yes, I'm concerned about the valve wear issue but after 20k miles it's not showing any signs of distress and I do run it quite often on petrol as well. The valve lubrication system I'm not so sure about, it doesn't seem to be controlled well enough to ensure each cylinder gets the right amount of oil, but hey, I'm willing to be proved wrong on that. In my view, if the issue is to do with soft valves / seats, then do a proper job and replace them with something harder, or don't convert the car to LPG at all.
There's no real noticeable difference in power although it does lose steam up gentle gradients quicker than it does on petrol. Towing is fine, albeit easily into single figure mpg.
Would I pay for the conversion myself ? For the JE jobbie with converted cylinder heads, yes I probably would, just for the piece of mind but I'd have to run it for at least 100k miles to feel like I'd had the value out of it. Would I do what the previous owner of my car did and convert it for half the price of the JE one with scant regard to any of the issues, certainly not. In hindsight, having found out more about the conversion since I bought my car, I wouldn't / shouldn't have bought it, considering the high mileage use I give it.
You pays your money as they say... BV55 YZE, ex G4 Challenge RRS. So not a Disco 3. Well, not quite.
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| Mon May 17 2010 1:26pm |
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4-Tech
Member Since: 08 Dec 2009
Location: None
Posts: 108
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MikeS,
FYI any valve train issues won`t show until about 60k. The valve protection system we fit doses each cylinder via the LPG injector, thus ensuring proper lubrication. Removing the heads and replacing the valve seats is both a costly and, now, unnecessary procedure.
I like to think that as I run two V8`s on gas with this system fitted it shows that I have the utmost confidence in it, this is how I like to promote any systems that I sell and fit.
The V8 in the D3/RRS/FFRR is not the only engine to suffer in this way. We convert many other vehicles that have the same issues, the long term prognosis on all of them when converted correctly, as I`ve previously described, is excellent.
The electronic valve protector is a German TUV approved system developed in Germany for cars that cover high Autobahn miles. The old style vacuum controlled systems do not produce sufficient flow of oil at wide throttle thus many cars in Germany were still getting valve problems even with that fitted. Problem now solved!
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| Mon May 17 2010 7:13pm |
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