38 mpg!!!!

[milo12]

In the new Diesel Power magazine they have a 12 truck shootout. One of the events is they all drive the same loop and best mpg wins. Well this year the winner got 38 mpg.

That is on a truck that dynoed at 1232 lb-ft of torque.

His secret is CNG, compressed natural gas, which is injected similar to propane. To make things even better he buys CNG for .70 cents a gallon.

Does anyone have any more info on how to do a CNG injection setup? Who sells a kit? With the incredible money savings this offers i really want to look into it. One factor is the availability of CNG. Obviously you can't get CNG just anywhere so that is a problem. You can buy a home setup that uses your house gas line. Some larger towns have CNG stations so that needs researching.

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2008 Dodge 3500 SRW Quadcab LB 4x4 Mineral Grey, Auto, 3.73, 6.7L Cummins. Lorenz Bilstein 5100 suspension. Thuren trackbar, Toyo 35 M/T. HID's

[patracy]

A diesel that runs CNG as it's only fuel isn't the same as a DI diesel engine. Did the truck run solely on CNG or was it just an additive?

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1999 2500 4x4 Club cab sport. BHAF, Quad XZT+(3K tune), Xzilliradier, full set of gauges, FP light, Holley Blue pump, 1/2" big line kit, 3" glasspack, TC lockup switch, poor man's 'pane setup, BD TC, BD VB, Billet input, Dearle pan.DURAMAX>Cummins

[Dodge04]

That is great mileage, no matter how he did it.

[rufushusky]

CNG system on Diesel Power Challenge truck 38mpg! - Competition Diesel.Com - Bringing The BEST Together

A good thread on CompD on the topic.

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Dennis
04.5 Ram 2500 Reg Cab 4x4 5.9, 48re, AEM, Smarty, TS Ramifier, Banks High Ram,FASS HPFP, Boost/pyro/trans/FP/RP gauges, 5" Exhaust, Cat 2 micron fuel filter, Amsoil Bypass

[plig_kid]

It was an additive. There is a shop locally that loves to do these things.

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01 ext. cab, shrt bed, 6spd w/ BD short shift kit, edge juice w/hot, bd 155 sticks, sb con fe clutch, 5 inch Diamond Eye, BD aux lift pump, Smarty, II silver 62, Haisley Machine O-ring head gasket, Arp Studs, all done by me!

[Cummins6speed]

Im interested

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My truck: 06 5.9 G56 4x4 Quad Cab Short Bed Patriot Blue. Home made intake w/ amsoil filter, magnaflow high flow cat, muffler delete, silencer ring MIA glove box sticker MIA
Mods to come: DiPricol gauges, Smarty/MP-8 stack, Valair 750hp clutch, 150hp injectors, twins, upgraded CP3, dual feed line, 7" single stack, Air dog 150, Carli Performance 2.5
IBEW Local 551

[mattpopp]

Originally Posted by patracy

A diesel that runs CNG as it's only fuel isn't the same as a DI diesel engine. Did the truck run solely on CNG or was it just an additive?

It was additive. The truck still used Diesel, hence the 38 mpg!! But that was at a high altitude also. The article also said that when he was running in a lower attitude he was getting 50 to 55 mpg. What the article did not say was how much Natural Gas he was burning. But either way I do not believe that you would burn that much NG. He should have a huge reduction in EGT as the NG will burn the Diesel much faster and you are not using much diesel at all. Also you should have a huge reduction in black smoke as what little diesel you are using would be burnt during the combustion.

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07.5 6.7l 2500 MegaCab 6sp Auto, 4x4 Inferno Red, Tough Country front Replacement,Browns Rear Replacement NFab crappie 6 steps, 20" Black Rockstars, 33" Nitto Terra, Bilsten 5100, B & W Hitch,5" TBE, AFE Mega C., MP8 & PMT
96' 2500 4wd, 47RE, Ext Cab, Stock, 134k ANTI-
If he brings you to it, He will see you through it

[HULKMAN]

WOW!!! I would be interested too!!!

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'05,3500 sw, laramie,nav, sunroof,48re, quadcab, 4x4, royal purple, banks intake, silencer ring mia, fab four rear bumper

[cumminsturbo94]

WOW thats really cool that link rufushusky gave us has the guy in the mag. so how exactly does it inject the CNG? is it similar to propane?

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'94 ram 2500 12-valve, 4x4, 3.55's, 47rh, autometer pyro boost and trans on the a-pillar, muffler and silencer ring MIA.

[patracy]

Originally Posted by mattpopp

It was additive. The truck still used Diesel, hence the 38 mpg!! But that was at a high altitude also. The article also said that when he was running in a lower attitude he was getting 50 to 55 mpg. What the article did not say was how much Natural Gas he was burning. But either way I do not believe that you would burn that much NG. He should have a huge reduction in EGT as the NG will burn the Diesel much faster and you are not using much diesel at all. Also you should have a huge reduction in black smoke as what little diesel you are using would be burnt during the combustion.

Sounds a lot like the propane stuff I was playing with. I'd imagine you could install a similar setup with a different regulator jetted for NG.

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1999 2500 4x4 Club cab sport. BHAF, Quad XZT+(3K tune), Xzilliradier, full set of gauges, FP light, Holley Blue pump, 1/2" big line kit, 3" glasspack, TC lockup switch, poor man's 'pane setup, BD TC, BD VB, Billet input, Dearle pan.DURAMAX>Cummins

[mattpopp]

From What little I know about how both system work the only difference is pretty much the Jet size and that you will not go as far on a tank of NG than Propane. Since Propane is stored as a Liquid and not as Gas.

THis may be something that I will add to the 96 12v

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07.5 6.7l 2500 MegaCab 6sp Auto, 4x4 Inferno Red, Tough Country front Replacement,Browns Rear Replacement NFab crappie 6 steps, 20" Black Rockstars, 33" Nitto Terra, Bilsten 5100, B & W Hitch,5" TBE, AFE Mega C., MP8 & PMT
96' 2500 4wd, 47RE, Ext Cab, Stock, 134k ANTI-
If he brings you to it, He will see you through it

[Brockdieseldude]

Could ya use the same regulator and such that a propane kit uses? Or dose the whole system need to be redone. Is CNG at a higher pressure than propane. There is a shop in St. George, UT that wants like around $5500.00 to buy and install the kit. I'm not sure of the name of the shop, a friend called and asked me about it.