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Old 03-27-2013, 09:01 PM   #1
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CNG Equipped TJ

Curious as to If anyone was equipped with CNG. (Compressed Natural Gas) From what I've read it may be worth a try, expecially with a sponsorship of some kind. I also hear the conversion is really easy, with the rear seat removed, it also has a perfect place for a NG tank. Anyone know of one done, or have one?
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Old 03-27-2013, 09:33 PM   #2
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I make living working on ng engines and I wouldn't convert any engine to run on it. Plus a jeep really can't afford the loss of horsepower.

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Old 03-28-2013, 07:46 AM   #3
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I make living working on ng engines and I wouldn't convert any engine to run on it. Plus a jeep really can't afford the loss of horsepower.
How big is the loss in hp?
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Old 03-28-2013, 07:51 AM   #4
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Not only loss of HP but less fuel efficiency. Had a Ford Bus done a few years ago at a cost of over 20K because we had to add a lot of tanks to try to get the same range as a gas powered bus. And where are you going to fuel when your on the road. CNG powered vehicles are only good if you have NG available.
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Old 03-28-2013, 08:04 AM   #5
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Not only loss of HP but less fuel efficiency. Had a Ford Bus done a few years ago at a cost of over 20K because we had to add a lot of tanks to try to get the same range as a gas powered bus. And where are you going to fuel when your on the road. CNG powered vehicles are only good if you have NG available.
I have it piped into my home, I could fill it in my garage.
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Old 03-28-2013, 08:44 AM   #6
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I have it piped into my home, I could fill it in my garage.
Sounds like a good way to get arrested. You need a ridiculous amount of permits to house a CNG fill location for obvious reasons. Not to mention your insurance will drop you and your neighbors will move out.

And more importantly, how will you fill up on the road?
In Boston we have fill stations in the city, but outside of that you would be screwed.
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Old 03-28-2013, 08:52 AM   #7
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Sounds like a good way to get arrested. You need a ridiculous amount of permits to house a CNG fill location for obvious reasons. Not to mention your insurance will drop you and your neighbors will move out.

And more importantly, how will you fill up on the road?
In Boston we have fill stations in the city, but outside of that you would be screwed.
They make home pump units for cng, I could obtain the permits, I live outside of the city. And who takes a lifted jeep on MT tires on a road trip? Lol of course you would have gasoline as a backup.
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Old 03-28-2013, 09:08 AM   #8
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O, then why. No power gains, loss of cargo room, expensive.

What are the pluses?
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Old 03-28-2013, 11:04 AM   #9
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O, then why. No power gains, loss of cargo room, expensive.

What are the pluses?
CNG is really inexpensive and your jeep can run it with hardly any modifications. With a sponsorship from a CNG company you could make your jeeps fuel bill 25% of what it was less equipment
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Old 03-28-2013, 11:51 AM   #10
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Even if you have it in your house where do you get it on the road or do you never plan to leave the neighborhood.
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Old 03-28-2013, 11:57 AM   #11
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In most areas it is illegal to convert a gas vehicle to cng. For on road use.
A Benefit of cng is you can go up or down steeper inclines without fuel cutting out. There's a few videos of a 302 on cng running completely upside down. And another video of it submerged under water.
Off road you will probably get better fuel economy. GL.
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Old 03-28-2013, 01:13 PM   #12
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How big is the loss in hp?
You could expect your hp to be cut almost in half. And to properly do the conversion you would need to get a camshaft with the proper profile for ng and I would also recommend proper valves and seats. Its not as easy to do it reliably as some might make it seem. Like I said I make a living working on ng engines and would NEVER consider doing a conversion.
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Old 03-28-2013, 01:49 PM   #13
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CNG is really inexpensive and your jeep can run it with hardly any modifications. With a sponsorship from a CNG company you could make your jeeps fuel bill 25% of what it was less equipment
I live in Oklahoma City, and I can get CNG for .99/ gal right now.

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In most areas it is illegal to convert a gas vehicle to cng. For on road use.
A Benefit of cng is you can go up or down steeper inclines without fuel cutting out. There's a few videos of a 302 on cng running completely upside down. And another video of it submerged under water.
Off road you will probably get better fuel economy. GL.
Where did you get that info? The CNG conversion industry if booming right now with people converting their vehicles over to CNG from gas. Pretty much all of the newer fuel stations are carrying it now. Our city-owned buses are also being converted.
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Old 03-28-2013, 02:01 PM   #14
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I live in Oklahoma City, and I can get CNG for .99/ gal right now.

Where did you get that info? The CNG conversion industry if booming right now with people converting their vehicles over to CNG from gas. Pretty much all of the newer fuel stations are carrying it now. Our city-owned buses are also being converted.
Are you sure its cng and not lpg?
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Old 03-28-2013, 06:17 PM   #15
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Where did you get that info? The CNG conversion industry if booming right now with people converting their vehicles over to CNG from gas. Pretty much all of the newer fuel stations are carrying it now. Our city-owned buses are also being converted.
I guess I should have been more clear. In areas where emissions tests are required you can not change your fuel type (ie gas to diesel or gas to cng ect. ) typically( in my area at least) once a vehicle is 25+ years old it is exempt from said emissions tests. A city bus designed to run on cng would be a different story since its a gov vehicle.
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Old 03-28-2013, 06:31 PM   #16
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City buses fall under different emission standards since they are normally diesel power. Plus they are 80 percent federally funded so the incremental costs, 50-75K per bus, is paid by all us taxpayers.
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Old 03-28-2013, 08:10 PM   #17
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Even if you have it in your house where do you get it on the road or do you never plan to leave the neighborhood.
You will use your gasoline.
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Old 03-28-2013, 08:11 PM   #18
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In most areas it is illegal to convert a gas vehicle to cng. For on road use.
A Benefit of cng is you can go up or down steeper inclines without fuel cutting out. There's a few videos of a 302 on cng running completely upside down. And another video of it submerged under water.
Off road you will probably get better fuel economy. GL.
Not illegal in Illinois. And idk why it would be...
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Old 03-28-2013, 08:13 PM   #19
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I guess I should have been more clear. In areas where emissions tests are required you can not change your fuel type (ie gas to diesel or gas to cng ect. ) typically( in my area at least) once a vehicle is 25+ years old it is exempt from said emissions tests. A city bus designed to run on cng would be a different story since its a gov vehicle.
That's absolutely f***ed up. Cng is cleaner than gasoline. And easier to extract from the earth. Why the hell would you not be able to.
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Old 03-28-2013, 08:15 PM   #20
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I guess I should have been more clear. In areas where emissions tests are required you can not change your fuel type (ie gas to diesel or gas to cng ect. ) typically( in my area at least) once a vehicle is 25+ years old it is exempt from said emissions tests. A city bus designed to run on cng would be a different story since its a gov vehicle.
I bet you live in California where all rules came from a coked out politician
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Old 03-28-2013, 08:41 PM   #21
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I bet you live in California where all rules came from a coked out politician
Not only that, the politicians all get donations from the CNG coalition.

Years ago I was solicited by the CNG coalition to buy CNG buses for the company I worked for, now my picture is on their dart board because I found many many holes in what they were pitching as clean and they would never answer some of my concerns.
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Old 03-28-2013, 10:50 PM   #22
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That's absolutely f***ed up. Cng is cleaner than gasoline. And easier to extract from the earth. Why the hell would you not be able to.
Mostly I believe it's because the cng is pressurized. People cut corners. Imagine if someone decided to put their tank in a bad spot and it got punctured in a wreck. Could turn out badly.
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I bet you live in California where all rules came from a coked out politician
Haha. GA. But the politicians are still Just as "coked out".
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Old 03-29-2013, 05:42 AM   #23
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CNG tanks are pressurized to 3,000 psi. There was one that blew up in a bus in Los Angeles a bunch of years back and bounced inside the bus while being fueled. The fueler was not injured because he as not inside cleaning it at the moment but it was hushed up from the press.

There is a by product of burning NG as a fuel, it emits Formaldeyhide and is not regulated. When I asked the CNG coalition about it they would not comment.

I do know this about it "toxic effects of formaldehyde on the nervous system"
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Old 03-29-2013, 11:28 PM   #24
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CNG tanks are pressurized to 3,000 psi. There was one that blew up in a bus in Los Angeles a bunch of years back and bounced inside the bus while being fueled. The fueler was not injured because he as not inside cleaning it at the moment but it was hushed up from the press.

There is a by product of burning NG as a fuel, it emits Formaldeyhide and is not regulated. When I asked the CNG coalition about it they would not comment.

I do know this about it "toxic effects of formaldehyde on the nervous system"
I guess gasoline is the only answer?
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Old 03-30-2013, 08:14 PM   #25
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I work for a Utility that has CNG stations and vehicles. You don't have enough room in your TJ to have any driving range with the size of tank that could be installed in it. We have long bed pickups with CNG tanks in the front of the bed that take up more than a third of the 8' bed to enable the truck to have any driving range at all. Some of the local Garbage and Bus Fleets have converted to CNG. I talked to a Garbage truck driver recently, and asked him how often he needs to fill the CNG tanks. Twice per day at 20 to 30 minutes per fill. Unless you have room for some large tanks you won't be going very far.

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Old 04-01-2013, 10:01 AM   #26
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I work for a Utility that has CNG stations and vehicles. You don't have enough room in your TJ to have any driving range with the size of tank that could be installed in it. We have long bed pickups with CNG tanks in the front of the bed that take up more than a third of the 8' bed to enable the truck to have any driving range at all. Some of the local Garbage and Bus Fleets have converted to CNG. I talked to a Garbage truck driver recently, and asked him how often he needs to fill the CNG tanks. Twice per day at 20 to 30 minutes per fill. Unless you have room for some large tanks you won't be going very far.

Rich
I was thining a bi-fuel system. Once out of CNG (where it could be fueled at home) you could fill it with gasoline. Save some cost on fuel. I don't drive more than 40 miles a day anyway

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