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Thread: City automatic does not perform on CNG?

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    Default City automatic does not perform on CNG?


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    Dear no car can perform on CNG, because they were not made for natural gas but gasoline or petrol. CNG can never match the performance that petrol gives on any vehicle, so it is a matter of compromise. To save money one has to sacrifice performance a bit.
    Be polite on the road. Always give way to others, particularly ambulances and pedestrians.

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    Yes this is already understood. The point is that city prosmetic is unusually sluggish on cng

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    i wonder, is there any city prosmatec

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    in my opinion, small cars perform well on cng as they are lighter, the heavier the car the slower on cng i guess, maybe a change of kit might help, would do u think ??

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    CNG is good only in cars that perform goos on Petrol as well

    Try putting it in a 1.3 Toyota Xli and see the difference

    no offense Bro,s but City is indeed Shitty in every aspect.
    it is made up of Plastic .....
    PLASTIC
    AE 86

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    one other point worthy of note bro's, where u fill up with cng from does matter, i.e where u'r cng station is located, The gas in Rawalpindi is very bad, further south down the G.T road the gas does get better.

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    The new shape city is underpowered/but good on fuel most of us know this fact. Auto's have lesser acceleration then Manual ones. So an underpowered automatic car with CNG will drag(talking about city).Petrol pai nahi bhagti tu CNG paar...... : )
    Life is short and very unpredictable just like a Quarter mile .....

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    I HAPPENED TO MENTION THIS ON ANOTHER PAGE THAT I HAVE OBSERVED THAT NO CAR WITH AUTOMATIC TRANSMISSION PERFORMS WELL ON CNG. BE IT A CUORE OR A CROWN, I HAVE NOTICED THIS. WHY? THIS I MYSELF DO NOT KNOW AND WOULD LIKE OUR ESTEEMED BROTHERS TO LET US KNOW. HURRY!

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    @VAJIH102,
    I totally disagree with u that no auto car performs well on CNG. On which basis did u say that?Do u own one? Do u mean acceleration wise?Top speed wise?Starting wise?In which sense?
    Life is short and very unpredictable just like a Quarter mile .....

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    Starting and moreover Acceleration and Top Speed. A friend's father took his Crown `86 to 220km/h on the motorway and now it goes not beyond 80km/h and that too with great difficulty. 60 is the max it does usually. As for Cuore, I heard someone else say the same on this very forum so few months back. Hence, i formed this opnion!

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    No car's transmissions are alike. If you take a same make and model of any car, that is Automatic VS Manual gear transmission, there is a difference of pick/acceleration. Both the cars can be driven at a fast pace/speed but the pick on a manual car is at the mercy of a driver, One can lock the gears from 1st to 2nd to 3rd at thier own descression, dependin on the acceleration being applied at the pedal. Where as the automatic transmission cars change gears (automatically) only when a certain RPM is hit/applied at a certain speed, so ofcourse the pick matters there.

    Automatic car on Cng is the same story, but due to the Gas and Not Actual liquid petrol, the Engine that is designed to handle petrol only will feel the lack of physical push against the pistons, to make it work faster. Yes on the other hand if a cars engine is designed only for Natural gas(CNG), then there might be questions resolved about the pick on the cars cars with CNG, and more over why do we forget that cng at this stage in Pakistan is a source of economical value not luxury. As it help the public thousands in gas prices at the petrol station.

    Can anyone ever imagine a Ferrari on CNG! that is the reason why. Power is Petrol.
    There are Automobile makers like Honda In USA those have made hybrid cars , those run on petrol, and on electricity. Same concept as our cars on cng and petrol, but you actually have to charge your cars motor/ battery. The same problem, the performance is compensated when the driver switches to electricity.
    So i guess these hybrid technologies are in thier initial stages, in most of the countries whether it be USA or Paksitan.

    Hopefully in the near future we will see a huge change in these technologies. But we need innovative mind and interested engineers to give thier time to this research with the help of the governments to improve this technology.
    Thank you hope this give some inshight .

  13. #13
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    To add one more thing that if the air filter on your car is clogged/ all dusted up, that will affect the cars's performance on cng as well.

    So just take it out and shake it or blow it clean. and see the difference. Also i agree with kkhan's comment the cheap CNG will, from different filling station's affet the performance of your car aswell, as for my car Total's petrol or cng is the best 2nd is PSo and i dont use any other as my car NEW 2005 Baleno, with only 3k Km cannot handel i feel the hesitation on the pick.

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    @Vajih102
    Brother i have an auto with CNG. Goes easy to 140-150km/hr.I am sure it can go if i open up the gas valve a lil more.My car has EFI kit,so it starts on petrol.So no starting problem.
    Life is short and very unpredictable just like a Quarter mile .....

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    things are not so simple as we think of, indcution of more gas into engine does not necesarily mean more pick and good top speed.

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    i would like to add my comments:

    basically the combustibility of CNG is less than petrol and so less power is generated. to compensate that, in a manual car one can rev the engine higher in each gear before shifting to the next one thus somewhat compensating for the lost power.
    where as in an automatic, the gears are changed following the same pattern.

    automatic gears usually upshift quiet early and so the car drops out of power especially on cng where not enough torque is generated as it is.

    even otherwise, the pick up of an auto. is generally less than manual.

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    CNG KITS come with different sized Capacitors .
    Like Landi Renzo has different sized kit for a car over a 1000cc and has a different kit for below 1000cc cars.
    So i think the Crown which is hardly touching 80 km/h has a Mehran kit in it.
    A kit with Capacitor for 3000cc will work for the Crown. Got it ?

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    See the Manual of the Kit before installing it.

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    the kits usually in use can support upto ~250 HP engines. I don't see any difference among them.

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    Well sid, there are also exclusive CNG cars in the international market now along with the hybrids, the compression ratio of the engines have been increased to make it perform good on CNG and there's also an exclusive CNG civic by the honda people and as I see it, CNG is at the time far more practical than the expensive and also expensive to maintain (as batteries are costly) hybrid cars.........
    Apart from pakwheels, my blogs can be also be viewed at http://tajziat.blogspot.com/

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