CNG kits

[Jesse.James]

I read in diesel power mag about a guy with a duramax who got 38mpg with a CNG kit on his truck. Has anyone tried this or know anything about it?

[REDPOWERSMOKER]

CARE TO ELABORATE WHAT A CNG KIT

[jblagg]

nefver heard of a cng kit sorry man
very interested w 35+ mpg that would be great

[Dave]

CNG = compressed natural gas. Its essentially the same as adding a propane kit to your rig. you gain some mpg's out of it yet but the costs of the propane and high cylinder pressures dont make it worth while to me

[Jesse.James]

yeah, i dont know much about it. but this dude said he got 50-55mpg but when they checked it for the diesel power challenge compitition he got 38 mpg. natural gas is still cheaper than diesel but i know much about the affects it would have on the motor. i just wondered if anyone here had tried it. or knew anything about it

[jgrijalva1]

I am also very interested in knowing about the CNG kit myself . i've being looking all over the net for any info ,but no luck . I guess we are going to have top try to contact the owenr of the Duramax and see if he can shed some light on that for us. Seems CNG runs for less than a dollar a gallon .

[wingnut]

from what i can tell, its not easy...diesel trucks need an ignition system added, as well as the heads modified to get a dang spark plug in there...dosent sound too easy...nor economical

[jmccall78373]

i have been looking into this a bit here recently and the guy from the mag is mark deluca. here is his web site: DeLuca Fuel Products
he built his set-up and is starting to build them for other makes/models also. i spoke with him via e-mail about one for my 95.
here are the basics i know from my research. first, it is not a complete conversion to cng, but a dual fuel set-up. it is much the same as water/meth and propane in that it is sprayed into the air intake charge pre-turbo then mixes with the diesel in the combustion chamber and is burned in conjention with the diesel during the comprssion/ignition process. I have read that it is safe up to a 9:1 mix of cng:diesel, but have been told that it is more realistic to think that a 7:3 mix is more realistic due to the loss of the lubricity for the engine that the diesel fuel provides. as far as the system goes it seems pretty straight forward. tank in bed plumbed to a manually metered regulator valve then on to the nozzle installed in the intake tube. regulator wired to a switch in the cab allowing the system to be turned on or off. the vehicle can be run on the cng fumigation system or straight #2 diesel as required by the owner or fuel supply allow. there is no tapping heads, installing spark plugs, or major engine modifications. as the cng is added the trucks computer compensates for the additional cng as fuel and adjusts the amount of #2 being added to the combustion process. the benefits of this type of system are cleaner more efficient fuel burn, horse power increases of up to 100hp, increased engine longevity, recorded lower egt's, and of course increase fuel economy. now, not every engine will see the same results power and economy wise because every engine is different and fuel savings depend on prices and availability in your area. before anyone starts telling me i'm wrong or starts throwing stones, i am NOT a professional mechanic and this knowledge is what i have learned reseaching this subject myself and is being presented to help others better understand the concept of cng fumigation on a diesel engine and is open for corrections.

[GeneralLee]

I also read the article in Diesel Magazine. And according to that it said its a 100% CNG and not a CNG and Diesel Fuel Mixture. I have been doing some research my self and the kit from PDI cost around five thousand. But then you have to either buy the compressor to put it into your truck that costs another couple thousand, or if you live in California I believe some of the fuel stations offer CNG. All in all if it does work the way they say it does then it would be a investment that I would be thinking about down the road. This is a link to the people that they bought the CNG equipment from....http://www.pdidiesel.com/

[wingnut]

5 grand+++...is it just me or does it seem like all these "kits" are charging an awful lot

just not worth it unless the price of diesel jumps to over 5 bucks a gallon and STAYS there...IMHO