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Chevy And GMC Are In Big Trouble Over Diesel Engines


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23 minutes ago, NaturallyAspirated said:

The processing used to remove the sulfur (not a lubricant) creates a situation where hydrocarbon molecules that are lubricants are destroyed.  

You are the one who doesn't understand what's going on bro.  Perhaps you need to do some research before spouting off.

:news:

Neal

and again why modern oil burners don't last lime there pre epa meddling counterparts 

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Neal's right. The rest of you are wrong.

Bosch provides the CP4 fuel pumps to GM and Ford that eat themselves up and send shit into the injectors. GM has a different fuel pump now.

 

Diesels are shit now because emissions DPFs, piss injections, regens, etc, and shitty ass fuel pumps.

 

But think about it, they make 400-500ish hp and 1000ft lbs or more  FROM THE FUCKING FACTORY. And still get good mpg for a 8k+ lbs truck.

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8 hours ago, Legend said:

Neal's right. The rest of you are wrong.

Bosch provides the CP4 fuel pumps to GM and Ford that eat themselves up and send shit into the injectors. GM has a different fuel pump now.

 

Diesels are shit now because emissions DPFs, piss injections, regens, etc, and shitty ass fuel pumps.

 

But think about it, they make 400-500ish hp and 1000ft lbs or more  FROM THE FUCKING FACTORY. And still get good mpg for a 8k+ lbs truck.

then blow up at 160k 

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9 hours ago, Legend said:

Neal's right. The rest of you are wrong.

Bosch provides the CP4 fuel pumps to GM and Ford that eat themselves up and send shit into the injectors. GM has a different fuel pump now.

 

Diesels are shit now because emissions DPFs, piss injections, regens, etc, and shitty ass fuel pumps.

 

But think about it, they make 400-500ish hp and 1000ft lbs or more  FROM THE FUCKING FACTORY. And still get good mpg for a 8k+ lbs truck.

You just delete all that shit then they’re awesome 

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9 hours ago, Legend said:

Neal's right. The rest of you are wrong.

Bosch provides the CP4 fuel pumps to GM and Ford that eat themselves up and send shit into the injectors. GM has a different fuel pump now.

 

Diesels are shit now because emissions DPFs, piss injections, regens, etc, and shitty ass fuel pumps.

 

But think about it, they make 400-500ish hp and 1000ft lbs or more  FROM THE FUCKING FACTORY. And still get good mpg for a 8k+ lbs truck.

Back a modern diesel down to 300 hp and under 600 ftlbs and it would last just fine with all the emission stuff.

pre emission diesels would not last at today’s power levels either

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13 hours ago, f7ben said:

Incorrect

Actually the process to remove the sulfer reduces lubricity of the fuel.

“ULSD diesel fuel has substantially reduced levels of sulfur,” says John Nowatzki, North Dakota State University Extension Service agricultural machine systems specialist. “The reason for lowering the sulfur content is to allow the application of newer engine emissions control technologies. This will substantially lower emissions of nitrous oxide and particulate matter emissions to the atmosphere. However, the process used to reduce the sulfur content in diesel also reduces the fuel's lubricating properties, resulting in increased wear on the various parts of the engine's fuel injection system.”

https://www.ag.ndsu.edu/news/newsreleases/2007/march-8-2007/ultra-low-sulfur-diesel-fuel-affects-lubrication/

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1 hour ago, BOHICA said:

Back a modern diesel down to 300 hp and under 600 ftlbs and it would last just fine with all the emission stuff.

pre emission diesels would not last at today’s power levels either

stockers are not lasting even close to pre epa fuel 

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58 minutes ago, Highmark said:

Actually the process to remove the sulfer reduces lubricity of the fuel.

“ULSD diesel fuel has substantially reduced levels of sulfur,” says John Nowatzki, North Dakota State University Extension Service agricultural machine systems specialist. “The reason for lowering the sulfur content is to allow the application of newer engine emissions control technologies. This will substantially lower emissions of nitrous oxide and particulate matter emissions to the atmosphere. However, the process used to reduce the sulfur content in diesel also reduces the fuel's lubricating properties, resulting in increased wear on the various parts of the engine's fuel injection system.”

https://www.ag.ndsu.edu/news/newsreleases/2007/march-8-2007/ultra-low-sulfur-diesel-fuel-affects-lubrication/

he is just a professor not a scientist.  

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2 minutes ago, Ez ryder said:

stockers are not lasting even close to pre epa fuel 

Tune back today’s stocker to pre emission power levels they would be every bit as reliable.

 

put a pre emission diesel to today’s power levels and they would have a good chance of puking out their 5.9 cummins guts all over the dyno

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4 minutes ago, BOHICA said:

Tune back today’s stocker to pre emission power levels they would be every bit as reliable.

 

put a pre emission diesel to today’s power levels and they would have a good chance of puking out their 5.9 cummins guts all over the dyno

keep em . 

I will buy a gas bb and it will pull as much as legaly alowed in a 3/4 or 1 ton and cost less to use and maintain and still run longer than post epa oil burners 

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:pc:

There is a misconception that sulfur is what provides the lubricity to fuel oil, but that idea is only indirectly correct.  Although the sulfur does contribute somewhat to lubricity, the lower lubricity level of low sulfur fuel is more a by-product of the refinery processes used for desulfurization.  In its purest state, crude oil would consist of various bonds of hydrogen (H) and carbon (C ) atoms linked together in chains of various lengths.

However, no crude oil is entirely pure, but always contains trace amounts of various impurities.  One such common impurity is sulfur; depending upon the crude source, the sulfur content can range from as low as 500 ppm (sweet crude) up to as much as 10 fold (sour crude) that amount.

 

During the desulfurization process via hydrotreating, hydrogen gas is introduced to the crude under extreme temperatures and pressures.  The hydrogen combines with the sulfur to form hydrogen sulfides that are then removed and ultimately converted into elemental sulfur for resale. 

 

Unfortunately, during desulfurization, critical polar and organic aromatic compounds innate to the fuel and identified as responsible for imparting significant lubricity quality, are destroyed under the necessarily intense operating conditions.  The resulting yield is a satisfactory low sulfur diesel fuel, but also one that is unsatisfactorily low in lubricity.

 

 

 

WHY THE FUSS ABOUT LUBRICITY NOW?

 

 

 

     For many decades, it was taken for granted that all distillate fuels, with the possible exception of kerosene, contained enough inherent lubricity to protect against engine wear.  There was no reason to define lubricity or to establish a test method to quantify a lubricity value.  For the most part, it was assumed that any fuel had the ability to provide adequate lubricity as one of its innate and irreversible properties. 

 

However, everything changed once the EPA began to look into diesel fuel exhaust emissions and, early on, identified sulfur as one of the main sources for objectionable smog-causing air pollutants, oxides hazardous to health and long term corrosive acid rain damage.   By the late ’90s, the EPA was exploring regulations to reduce the sulfur content of distillate fuels, especially on-road diesel. 

 

As the likelihood of new regulations became more imminent and oil refiners investigated available processes available for crude oil desulfurization, one critical piece of information became obvious’that any significant reduction in sulfur content would result in a significant reduction in fuel lubricity as well.   

 

Realizing this correlation, ASTM launched a task force to include lubricity requirements as part of its existing ASTM D975 Standard Specification for Diesel Fuels.  Concurrently, another task force was assigned to determine an effective laboratory test method to measure lubricity values. 

 

https://fueloilnews.com/2010/03/04/taking-the-mystery-out-of-lubricity/

 

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22 minutes ago, awful knawful said:

Nope. Emissions is killing them!

Emissions is the DPF and SCR systems.  Fuel pumps that are being chewed up are not emissions.  Not the emission equipment

pre emission diesels run fine on the ultra low sulphur diesel without issue.

 Increasing hp to these levels require a lot of tech in the engine....  all emission systems are after treatments....

 Back off the hp and you could get by with more reliable engine components.

Edited by BOHICA
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1 hour ago, BOHICA said:

Emissions is the DPF and SCR systems.  Fuel pumps that are being chewed up are not emissions.  Not the emission equipment

pre emission diesels run fine on the ultra low sulphur diesel without issue.

 Increasing hp to these levels require a lot of tech in the engine....  all emission systems are after treatments....

 Back off the hp and you could get by with more reliable engine components.

These ultra high pressure fuel systems needed to meet emissions are also a problem 

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3 minutes ago, 168hp CAT 800 said:

These ultra high pressure fuel systems needed to meet emissions are also a problem 

These ultra high fuel system pressures are required for power and efficiency as well.

 

deleting the emissions....  you still have the ultra high pressures still there with out emission controls......  you can roll coal and be emission free and still chew up fuel pumps in a duramax....

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