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Thread: CNG conversions?

  1. #1
    Forum Member 1st year Apprentice
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    Default CNG conversions?

    Has anyone here done a CNG conversion or perhaps have any idea when a CNG prius such as

    http://www.ngvglobal.com/technology/...cng-prius.html

    or similar might be available in Aus?

    I like the idea of refueling at home.
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  2. #2
    Hopefully soon a 5S-GTE Chief Engine Builder MWP's Avatar
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    Default Re: CNG conversions?

    Cng?

    0987654321

  3. #3
    Altia ER34 GTT Domestic Engineer JetspeedCamry's Avatar
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    Default Re: CNG conversions?

    ^ Compressed Natural Gas
    Kind Regards,
    Kurt.

    1998 ER34 ニッサン スカイラインGT- T
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  4. #4
    Sleeper Central Backyard Mechanic Pure_In_Sanity's Avatar
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    Default Re: CNG conversions?

    I dont think it would be easy to refill at home. CNG tank pressures are far higher than LPG systems. Not sure if there are any vehicles converted here yet, except for forklifts and other commercial equipment.

  5. #5
    Junior Member Domestic Engineer MRMOPARMAN's Avatar
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    Default Re: CNG conversions?

    ive heard of some taxi's running CNG as an experiment. never got to see the results though.

    talk to someone in thetaxi industry, they might be able to point you in the right direction

  6. #6
    Gobble, Gobble! Automotive Encyclopaedia mrshin's Avatar
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    Default Re: CNG conversions?

    It is doable, however the refuelling system costs a fair bit, and refuelling times are very slow compared to low pressure fuels. It's generally practical for daytime fleet vehicles, such as buses and delivery vans.

  7. #7
    Forum Member 1st year Apprentice
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    Default Re: CNG conversions?

    yeah, theres a machine called the phill

    (http://www.myphill.com)

    the page also mentions a CNG Honda Civic available in the US

    I just thought maybe you could fit a different tank to a car already converted to LPG
    past; Yamaha RD250LC, Kawasaki GPZ500s,
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  8. #8
    serial biochemist Automotive Encyclopaedia
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    Default Re: CNG conversions?

    some TransAdelaide buses are running it here in SA
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  9. #9
    Junior Member Grease Monkey rj_darlow's Avatar
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    Default Re: CNG conversions?

    There's a servo in Fyshwick (ACT) that has CNG. Thoughts on maintaining a high enough pressure in a tank in a car included a balloon type thing inside the tank that gets blown up when there isn't as much gas left. Kinda like making the gas tank smaller, so the pressure is maintained. This is just a thought though, no idea if it would actually work.

    You can bump up the gas pressure out of your meter at home, but it's not much, and wouldn't help with re-fueling. It does give you cheaper gas, though...

    Cheers,
    Richard

  10. #10
    Toymods Board Member Chief Engine Builder Hiro's Avatar
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    Default Re: CNG conversions?

    A lot of the newer buses in Sydney run CNG, but I'm surprised at how slow take-up of the technology has been, I remember reading about the 4-door Charger concept car a few years ago that ran a supercharged CNG engine, and basically nothing has come of it.
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  11. #11
    Altia ER34 GTT Domestic Engineer JetspeedCamry's Avatar
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    Default Re: CNG conversions?

    In the US, Toyota brought out Gen 4 Camry's (97-2002 series) in CNG format. Used the 5S-NFE engine.
    Kind Regards,
    Kurt.

    1998 ER34 ニッサン スカイラインGT- T
    RB25DET 5 Speed Manual | Blitz SE Return Flow FMIC | Greddy Profec II Spec B BC | Apexi N1 Turbo Back Exhaust

  12. #12
    Gobble, Gobble! Automotive Encyclopaedia mrshin's Avatar
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    Default Re: CNG conversions?

    There's nothing new about CNG. The problems are the refuelling, the weight of the tanks, and the relative low density of the fuel meaning you need a fair bit of it to be usefel. Rather irrelevant, but kind on think of LPG being to petrol, what CNG is to methanol - both in density difference, and octane rating.

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