Lets talk CNG

[kamakazi]

Doesn't lpg require a higher compression ratio compared to gasoline for better fuel efficiency.

The table in that lpg vs cng website, which was linked, needs to be corrected regarding the weight of the respective tanks. The values need to be flipped(lpg having the lighter tank)

I remember LPG for more power over gasoline; old Team AON Ford focus in BTCC racing.

[sMASH]

Men who have the old cng kits, using lpg on them.

I not sure if the computerized kits might allow a simple switch to lpg.


Could always add gas tank head and try it, but I really feel the computer will lock it out.

[1/4 mile king]

Yes. A volume of LPG does have more energy than CNG. IIRC, LPG in 3x more energy dense than CNG @3000 PSI.

LPG requires a lower compression ratio than is acceptable for gasoline to achieve maximum fuel economy. Compression ratio, thermal characteristics, and a few other reasons are the cause of lower fuel economy in converted engines.

It isn't recommended, but I have seen LPG tanks refilled in garages by turning the donor tank upside down.

So based on google research lol. The diesel to LPG ratio in a dual fuel system = 70:30 compared to CNG = 5:95 or 10:90. When they raised the LPG to diesel in the dual system, they got poor performance including knocking. Basically, the CNG allows the running of less diesel and thus saves on money since the diesel cost more compared to CNG $1/Liter. I understand now why the RAMCO tractor trucks use CNG and not LPG because they get more miles on a tank of diesel. With regards to explosions, I believe persons should have their systems supplied or installed by experienced or qualified technicians/companies. CNG systems are easy to instal based on youtube lol but proper tanks, lines and etc are mandatory. I got my system from BURMAC and every 20k km I am required to get it serviced and checked.

[Theo 77]

I installed cng in my car about 1 month ago. When the car is cold it works great, but after an hour or so, rough idle, engine backfire, cutting off and so on. I got advice from many ppl, took all the advice I got, spent alot of money and same problem persist. I got so frustrated, I almost sold the car out of frustration. I came across a post on this forum from Jerry88. That says regap you plug .8mm or get colder plugs if possible. I used number 5 ngk before, but after seeing his post I got number 7 ngk and to my surprise, PROBLEM SOLVED!!! Absolutely no miss, no back fire nothing. Car runs smoothly, after about 5 hours of continuous use, no issue or problem whatsoever. Just want to say thank you very very much. After losing all those sleepless nights over this cng issue, I can finally get some sleep. Long story short I just want to say THANK YOU!

[dtopshottas]

[Ted_v2]

Anyone still looking for retrofits?
cng really made a few drastic improvements over the last few years from what you guys know, smaller lighter components, more tuning software and ecu changes. Works really well. highly recommended.

[killercow]

Anyone still looking for retrofits?
cng really made a few drastic improvements over the last few years from what you guys know, smaller lighter components, more tuning software and ecu changes. Works really well. highly recommended.

Where did you do your installation?

[1/4 mile king]

I saw a modern day wagon this weekend being towed to a cng pump. The vehicle runs on cng only ( no gasoline system ) . He ran out of cng basically. IDK persons had vehicles doing that still. From what I understand, the liquid gasoline prevents your engine from running 2 lean and frying pistons etc by using its cooling effect inside the cylinders. The system I have uses a 13% gasoline : 87% cng ratio based on fuel consumption calculations. It's calibrated to ensure
that my engine doesn't damage by being 2 lean. Just think it's 2 risky and being a cheapo running on cng only.

[wingnut]

I saw a modern day wagon this weekend being towed to a cng pump. The vehicle runs on cng only ( no gasoline system ) . He ran out of cng basically. IDK persons had vehicles doing that still. From what I understand, the liquid gasoline prevents your engine from running 2 lean and frying pistons etc by using its cooling effect inside the cylinders. The system I have uses a 13% gasoline : 87% cng ratio based on fuel consumption calculations. It's calibrated to ensure
that my engine doesn't damage by being 2 lean. Just think it's 2 risky and being a cheapo running on cng only.

Good info. I always thought cng vehicles were running on either gas or cng at a time. Is yours a oem or conversion?

[sMASH]

Anyone still looking for retrofits?
cng really made a few drastic improvements over the last few years from what you guys know, smaller lighter components, more tuning software and ecu changes. Works really well. highly recommended.

Would the new software allow for simultaneous injection of gasoline and cng?

[1/4 mile king]

I saw a modern day wagon this weekend being towed to a cng pump. The vehicle runs on cng only ( no gasoline system ) . He ran out of cng basically. IDK persons had vehicles doing that still. From what I understand, the liquid gasoline prevents your engine from running 2 lean and frying pistons etc by using its cooling effect inside the cylinders. The system I have uses a 13% gasoline : 87% cng ratio based on fuel consumption calculations. It's calibrated to ensure
that my engine doesn't damage by being 2 lean. Just think it's 2 risky and being a cheapo running on cng only.

Good info. I always thought cng vehicles were running on either gas or cng at a time. Is yours a oem or conversion?

Burmac conversion. I made sure and asked about the engine being to lean and frying. They assured me that while on cng the gasoline injectors still feed gasoline into the engine to prevent damage. The engine also starts on pure gasoline only, then switches when heated up. The modern cng electronic systems allows for gasoline/cng ratio tuning since the gasoline and cng injectors are controlled by the cng ecu.

[1/4 mile king]

https://twitter.com/gottaluvness69/stat ... 9838682228 ..

See above for ramco LPG. Are there any feedback or reviews on the ramco LPG Kits? I would like to know what's the catch? How many refills are you mandated to buy per month? $87 per refill but what is the amount in liters per refill and what's the average range per tank for a 2000cc N/A gasoline engine SUV? Is it a dual system as in, does it use a gasoline and LPG mixture or LPG alone when on LPG?

[killercow]

https://twitter.com/gottaluvness69/status/1731041609838682228 ..

See above for ramco LPG. Are there any feedback or reviews on the ramco LPG Kits? I would like to know what's the catch? How many refills are you mandated to buy per month? $87 per refill but what is the amount in liters per refill and what's the average range per tank for a 2000cc N/A gasoline engine SUV? Is it a dual system as in, does it use a gasoline and LPG mixture or LPG alone when on LPG?

You have to spend $700 per month in refills. I hear the mileage is better as they give you two tanks (only one connected at a time) but the cost per km is higher than CNG. My insurance agent already informed me that if I do the conversion he will not be renewing my car insurance.

[1/4 mile king]

https://twitter.com/gottaluvness69/status/1731041609838682228 ..

See above for ramco LPG. Are there any feedback or reviews on the ramco LPG Kits? I would like to know what's the catch? How many refills are you mandated to buy per month? $87 per refill but what is the amount in liters per refill and what's the average range per tank for a 2000cc N/A gasoline engine SUV? Is it a dual system as in, does it use a gasoline and LPG mixture or LPG alone when on LPG?

You have to spend $700 per month in refills. I hear the mileage is better as they give you two tanks (only one connected at a time) but the cost per km is higher than CNG. My insurance agent already informed me that if I do the conversion he will not be renewing my car insurance.

Thanks for the feedback. RAMCO LPG might be good for those who cannot afford the CNG conversion and does a lot of mileage per month. Plus they will have to be living nearby sando to get refills easily or order the refills and probably pay for delivery of the tanks. But yes LPG is way more dangerous than CNG since it doesn't diffuse into the air as easily.

[sMASH]

But lpg in the country donkey years, and no srs problem... So... It safe enough

[PariaMan]

But not in cars!

[pugboy]

[adnj]

[1/4 mile king]

But lpg in the country donkey years, and no srs problem... So... It safe enough

What I meant was in comparison to CNG which easily diffuses into the atmosphere making it too lean to ignite. If there's a leak or a collision the vapor of LPG doesn't easily diffuse into the air leaving a very dangerous situation compared to CNG. A CNG cylinder is stronger I believe, since it's design to contain a lot of pressure. I think in this forum someone mentioned that the old cng kits from the 90s. Persons used lpg to refill them and ran on lpg while there weren't any cng stations available. I highly doubt you can use cng in a lpg tank due to the high storage pressure of cng. Kindly correct me if i am mistaken.

[Ted_v2]

But lpg in the country donkey years, and no srs problem... So... It safe enough

What I meant was in comparison to CNG which easily diffuses into the atmosphere making it too lean to ignite. If there's a leak or a collision the vapor of LPG doesn't easily diffuse into the air leaving a very dangerous situation compared to CNG. A CNG cylinder is stronger I believe, since it's design to contain a lot of pressure. I think in this forum someone mentioned that the old cng kits from the 90s. Persons used lpg to refill them and ran on lpg while there weren't any cng stations available. I highly doubt you can use cng in a lpg tank due to the high storage pressure of cng. Kindly correct me if i am mistaken.

Yep cng is 3000+ psi depending on the pump and the temperature.

Cng tanks are rated to handle upto 6500+psi so its very safe.

[sqrepants]

I am getting alot of backfire, I think my spark plugs are failing. Running on gasoline works perfect though. Anyone know what/where I can get the .8mm plugs at for my 2013 elantra?

[Dave]

You can always gap them downwards.

[Halfbreed07]

I have a 2010 L200 with a factory installed cng kit, I did a full up today and went for a drive along the very bad Arima old road. Mid way up the hill I started to smell the cng very faintly inside the cabin, I switched back to diesel. Then when I hit the hiway I tried the CNG again, this time the smell was stronger. We only recently go this van and it's my first CNG vehicle. Is this normal after a full up or is it possible that I got a leak from driving along the rough road? Yes I'll check the mech, but I wanted to know if anyone experienced something similar and if it was an easy fix.

Kind Regards.

[Cooper]

You have a leak. Shut off the main valve near the tank and check all the rubber lines and regulator.

This happened on my brother's Xtrail. In his case the rubber line going into the intake manifold was cracked.

You can have it replaced at the nearest CNG service center.

[1/4 mile king]

I have a 2010 L200 with a factory installed cng kit, I did a full up today and went for a drive along the very bad Arima old road. Mid way up the hill I started to smell the cng very faintly inside the cabin, I switched back to diesel. Then when I hit the hiway I tried the CNG again, this time the smell was stronger. We only recently go this van and it's my first CNG vehicle. Is this normal after a full up or is it possible that I got a leak from driving along the rough road? Yes I'll check the mech, but I wanted to know if anyone experienced something similar and if it was an easy fix.

Kind Regards.

Easy fix since it stops when the cng is turned off via the switch inside the vehicle. It's probably leaking after one of the injectors but before it goes into the intake manifold. Since at high speeds when the cng demand is more, you get a higher scent or when climbing the hill and more cng is demanded. The injectors allow for more cng flow when more current is given to it via your accelerator pedal being pressed more. Btw smart choice going for a cng pickup. Hybrids are too fragile and crappy km/$ compared to cng.

[triniguy868]

***CVT KITS***

Now on my 2nd Transmission CVT has been a challenge.
Anyone knows a reputable CVT mech who can "re-build" the one I currently have?
Honda City 2016 CNG

[1/4 mile king]

***CVT KITS***

Now on my 2nd Transmission CVT has been a challenge.
Anyone knows a reputable CVT mech who can "re-build" the one I currently have?
Honda City 2016 CNG

DON'T GO TO CHAGUANAS AUTO SUPPLIES. I am speaking from experience. Check glasses somewhere cunupia side. My friend got 2 of his vehicles transmissions rebuild by glasses and it included an air cooled transmission fluid cooler. I wish I had went there instead.

[triniguy868]

Wow! Truly appreciate the recommendation. Going central tomorrow!

[Dave]

Also throwing in Flash and Jai for rebuilding transmissions. Both in Aranguez.

[1/4 mile king]

Also throwing in Flash and Jai for rebuilding transmissions. Both in Aranguez.

Yes check them all. Look online for reviews because a transmission rebuild is an expensive investment