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Thread: LPG Conversions?

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    Regular Member chrisf70's Avatar
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    Default LPG Conversions?

    Morning.

    After having the Signum for four years, I'm starting to get itchy feet but would like another with a different engine.

    Have seen a good 2.8T one that ticks all the boxes FSH, lowish miles etc. The thing that is interesting is that it's had a pro LPG conversion. I know all the common facts on LPG; lower bhp, mpg when running on it but does anyone have experience with aftermarket LPG conversions; reliability, known issues etc?

    Especially on the 2.8?

    Cheers

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    Regular Member John Bishop's Avatar
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    Used to have an omega a few years back, a 2.2 auto. Ran fine with no probs, smooth and quick. Just had to have the lpg filter done every 20k

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    Not 2.8 but had my vec 2l turbo done earlier this year and it's been faultless so far. Mine is a BRC conversion which is one of the best you can get. Only downside to it is the size of the fuel tank. Being in the spare wheel bay it's on a 50l tank, which will only fil to 80% due to expansion, but I'll do 250miles to a tank. I don't rag my car, and the drop in performance is quite negligible. Still got a good bit of poke when needed.

    I would make sure it's serviced before purchase if it's from a dealer.

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    VIP-Member Woody's Avatar
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    Again, not 2.8 but my car is a 3.2 gsi auto purchased with the gas conversion already done, and specifically to take the time to improve performance while running at a lower cost. A really imperceptable change in performance in exchange for fuel at 69.9p per litre and averaging 25mpg so equate that to 50mpg at the price of unleaded. Drawback as Aidi stated is the fairly small fuel tank in the spare wheel well, but, you still run automatically on petrol when the gas runs out, or if you switch over manually so running out shouldn't be an issue.
    I've only had my car a couple of months and I am already saving money when compared to running my previous VectraB 2.5 CDX Auto which was getting 30mpg average.
    I accept that I haven't experienced the maintenance side of the gas conversion but hope that I will still come out on the plus side allowing for filter changes.
    Cheers
    Woody

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    Regular Member DTi Elite's Avatar
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    my old 2.0 vectra B was LPG converted & did 28 mpg on gas no matter how I drove it , the main downsides for me were finding filling stations that had gas & loss of boot space due to having to carry a spare wheel .

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    North Wales - Assistant Regional Organiser
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    Go with a proper, decent LPG system if you're going to get it converted. I had an Omega with a Prins sequential system on and it was faultless. Heard good things about BRC too.

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    Regular Member rich r's Avatar
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    Default

    Had BRC on my previous car (Subaru Legacy 2.2), and have a factory fitted Dual Fuel Vectra 1.8 now. Both superb systems.

    Only real downside I've ever found for LPG is what to do with the spare wheel. Never had a problem finding places to fill up - don't forget you've still got a fully functional petrol tank, so you can always run on petrol until you find somewhere that does sell LPG. But the Asda across the road from where I work sells it (at 64p a litre at the moment), so filling up isn't an issue.

    Power isn't necessarily less on modern LPG systems as they can advance the ignition timing. Certainly you can't tell the difference in my Vectra, and the only noticeable difference in the Legacy was that it was smoother and quieter on LPG. I've got a friend with a Golf VR6 on LPG, and he reports identical times at the drag strip for petrol or LPG (slightly slower than a non-LPG VR6 due to the weight of the tank though).

    I get around 43mpg on LPG in my Vectra if I drive carefully, 37mpg if I'm town a lot. On petrol I can get 52mpg if I'm careful, but 42mpg is more usual. The Legacy was about 23mpg on LPG, 26mpg on petrol regardless of driving type.

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    Think I have the same engine - 2.8T in the elite estate. Had it converted in 2007 - excellent job and cheap motoring. Unfortunately you're a bit far away from the M1 J28 areas to suggest where to take it.

    As others have said, there are cheap systems and good systems.

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