'12 now on CNG

[tp0d]

whats yer thoughts on expired tanks?

and are you thinking of selling a kit to install CNG in a deezul?

tnx

-j

 

[Roostre]

whats yer thoughts on expired tanks?



and are you thinking of selling a kit to install CNG in a deezul?



tnx



-j

Expired tanks are a no-no, unless you can get them re-certed; but I don't think its possible right now. New tanks are now good for 25 years... and there is no difference in the manufacturing methods that I know of. Time has just shown that the tanks are very robust. I've seen data that shows that the tanks are capable of being filled once a day for 146 years without failure. Just not a risk I want to take. If something happens (accident, etc) it puts a negative light on you and may cause you unrelated grief.



No- I am not selling anything. Just a diesel enthusiast that enjoys tinkering and good diesel discussions. Coming up with a means to avoid burning 50% of the foreign oil I used to excites me and I wanted to share-even if it gets more people on the bandwagon.



I bought my kit off Ebay and I have been in communication with the seller as he is keen to offer a diesel kit. His regulators are very good quality and not made in Chinwa (Italy). I have no vested interest in any CNG or CNG related products. This is merely for entertainment value and to learn a little sumthin'.

 

[Roostre]

Am interested, Where did you get all the parts for this system?, and what do they consist of?, Thanks for the thread, Monte

Because I am unsure of the site rules on linking products I sent you a private message.

 

[Walcott]

could you send me the info on seller as I'm interested in building a kit for my 03.
Thanks for the help!

 

[Roostre]

could you send me the info on seller as I'm interested in building a kit for my 03.
Thanks for the help!

Ok.

A little more tweaking and tuning and even better results!! Installed 20 GGE of tanks last night. During the process I pulled the low pressure hose off and removed the "power valve"; the line now hooks straight onto the factory fitting and the elbows have been eliminated. Holy Cow!! What a difference! I am no longer feeling that the regulator is on the small side. This thing is now flowing some serious CNG. I had to completely re-tune the idle and high flow as they were immediately too high. Diesel MPG has jumped considerably, plus the whole system is now much more tune-able.

Reminds me of this quote: Antoine de Saint Exupéry's "It seems that perfection is reached not when there is nothing left to add, but when there is nothing left to take away".

 

[EricBu12]

Roostre.

That is awesome!. I was looking to get the Water/Methanol 3 system and make it up to 50% methanol. The price of that stuff is about the same when you buy the Heat gas treatment which is methanol. Add that to Washer fluid and you have 50%. Think that system has to hook to the map sensor to read pressure. . not sure... That CNG system looks cool. . might have to look into one of those.

 

[EricBu12]

Is this the set you have Corey? . . I see this on Ebay . . Also what "type" of tank do I need? 1,2,3 or 4?

 

[Walcott]

A big thank you!!!

 

[Ken Keeler]

Man, I spent 250. 00 in fuel this week covering the state of Florida in sales towing only 3500lbs, I would love to know which kit and some pics of the install. I could not see any that you posted here. thanks in advance. Ken

 

[Roostre]

Is this the set you have Corey? . . I see this on Ebay . . Also what "type" of tank do I need? 1,2,3 or 4?

View attachment 84949

Not sure if that is the kit. Looks close, but the regulator is different.

Tanks- If you do a little research you will see that they each type that is certified for CNG is different. Type 1 tanks are all steel and the heaviest and cheapest. Each type gets progressively lighter and contains more composite material. Type 4 is the "Cadillac" - very light and very $$$. This site has some good info: http://ews. mybigcommerce.com/cng-tanks-1/ Mods I hope that is OK.

Please do your research. The system needs a CSA inspection every 3 years or 36,000 miles. Here in Utah the certificate is required when you go in for a regular inspection or you will fail, which means no registration.

 

[Roostre]

Man, I spent 250. 00 in fuel this week covering the state of Florida in sales towing only 3500lbs, I would love to know which kit and some pics of the install. I could not see any that you posted here. thanks in advance. Ken

Ken - all the pictures are here: http://s286. photobucket.com/user/Roostre_photo/library/CNG%20Cummins?sort=3&page=1

Again, make sure you check your local laws. I really don't want someone to jump in and find out that its NOT legal where they live. (Although I think its insane for a competently installed, inspected improvement like this to be unobtainable to so many. )

 

[Jbremount]

This is a very interesting topic! How does the CNC conversion effect the lubricity needed for longevity of the injector on a common rail diesel? It seems every thing points towards adding more lube or having enough lubricity for the injectors to last.

 

[Roostre]

This is a very interesting topic! How does the CNC conversion effect the lubricity needed for longevity of the injector on a common rail diesel? It seems every thing points towards adding more lube or having enough lubricity for the injectors to last.

I can only see that being an issue at an idle; is there enough flow of diesel to keep the injector lubed then? That can be fixed by turning the idle adjustment on the CNG regulator all the way to closed.

At any other speed above idle you are essentially reducing the duty cycle of the injectors. I am betting the injectors will last longer. To hedge that bet I do run some B-20 mixed in every tank. (So effectively B-2 to B-8 depending on how much I put in. )

 

[Gary - K7GLD]

Back in the mid-late '90's, there were a number of guys, including several here locally, that were playing with propane injection on the old 12 and early 24-valves. This doesn't appear to be much different in concept. I'm sure that there are some threads back from the early days of TDR that discussed it.

I was one of those experimenters, used the setup on my '91 Dodge/Cummins - install and setup was quite easy, response was smooth, and mine was added for increased power, which it DID produce. It was an interesting power adder on a truck that had few similar options at the time in the same price class - on my current '02 truck, the added Edge Comp provides similar power increase at a similar cost, as well as better MPG, so never considered adding the CNG/Propane setup on it...

 

[Wingate]

This is a very interesting topic! How does the CNC conversion effect the lubricity needed for longevity of the injector on a common rail diesel? It seems every thing points towards adding more lube or having enough lubricity for the injectors to last.

The lubrication is not an issue, but heat is. That has been the limiting factor on substitution, if you back out the diesel delivery too much, you will not shed enough heat for the injector tips to remain cool, which can lead to premature wear/failures.

 

[Roostre]

Great points!



As I said in an earlier post I am now getting plenty of fuel flow by removing the "power valve". It must be used on the car conversions to tune the A/F ratio in a rough manner. It is totally unnecessary on a diesel as far as I can tell. Here is the 'why' of why it didn't flow very well. Anybody that has been around hot rodding at all should see the problem:

#ad




This is wide open!! Turn it any more and it falls out!

#ad




There is a bowl in the bottom of the valve that probably compensates for the large ball end, but the material is so thick that I would guess it cuts 25-35% of the gas flow.



The regulator flow control seem to be working well. I turned it down today for around town duties. When I do another long road trip empty I will open it back up.

 

[Walcott]

How do you determine correct ratio without hurting motor? I tow 6 days a week and do not want to damage motor?

 

[Roostre]

My method has been to find the longest flattest stretch of highway I can. Maintaining a steady speed (usually 65) with no CNG I see what my instantaneous MPG reads. (For instance 15MPG) At his point I turn on the CNG and wait for the instantaneous to stabilize for a minute (Now reads 30MPG). This tells me I am running about 50/50 at 65MPH.



The second method is to fill the CNG and diesel at the same time and then compare gallons used.



Before I tow with it in earnest I plan to run the same test along the same route with the trailer in tow. I normally get about 9 MPG at 60, so I will adjust the flow until I am getting about 13 MPG instantaneous on the flats. Not very scientific, but it should work.



For those who do not have an instantaneous- I borrowed the Ultragauge out of my wife's Jetta and it reads everything from the Dodge computer fine. It will even clear codes. It does take some set-up though. For $60 its a bargain. http://www.ultra-gauge.com/ultragauge/index.htm

 

[alex55]

It is very useful way to save the fuel and cost. CNG is giving more millage than fuel and it will reduce population there are so many benefits but here also a disadvantage here it will effect on engine of the vehicle so be careful also before going to do a experiment.

 

[Roostre]

Quick update. Have had 2 ten gallon tanks installed for a little over a week now. Put a toolbox over the front one and have a simple diamond plate treadbrite cover being made for the second tank. They take up a bit more of the bed than I had hoped, but still plenty of clearance for the 5'er hitch and its motion.

Filled up this morning for the first time in a week- took 13. 5 gallons of CNG.

Ordered my gauges. Getting the Edge Insight CTS with an EAS EGT probe.

Alex55- I'm guessing you meant pollution, mate?