6.7...305HP or 350HP?

[DPeltonen]

"Dodge Ram Power with New Cummins® Engine



With an unprecedented 350 horsepower and 650 lb-ft of torque, the all-new 6. 7-liter Cummins® turbo diesel engine is now available on select Dodge Ram pickup models, along with Dodge's first six-speed heavy-duty automatic transmission to accommodate its brute strength and power. "



This notice was part of the Dodge.com ad that showed up in my personal e-mail this morning. Not a problem for me, but I was curious about the HP and Torque listed. Are there two 6. 7's being offered, one with 605HP and 610Torque and the other with 350/650?

 

[Steve St.Laurent]

Yes, the 305/610 is in the chassis cab trucks (3500 C&C, 4500, & 5500) which meets 2007 emissions levels for that class of vehicle, and the 350/650 is in the 2500/3500 and meets the 2010 emissions levels for that class. They are not in the same emissions category.

 

[betterthanstock]

It's not just emissions. The Chassis cab is meant for a hired driver, not an owner.

So they limit power, to prevent reckless driving and high insurance /fuel consumption, etc.

Consider that an 18 wheeler UPS truck has only about 280 hp to haul 80,000 lb.

The driver will always drive that truck flat-out, and it will go a million miles.

 

[MCummings]

305 or 350HP?



Yes.



Commercial rating is 45HP less...



Merrick

 

[JHardwick]

Consider that an 18 wheeler UPS truck has only about 280 hp to haul 80,000 lb.

The driver will always drive that truck flat-out, and it will go a million miles.

Yeah, but what's the torque rating? :-laf

 

[wxman]

Yes, the 305/610 is in the chassis cab trucks (3500 C&C, 4500, & 5500) which meets 2007 emissions levels for that class of vehicle, and the 350/650 is in the 2500/3500 and meets the 2010 emissions levels for that class. They are not in the same emissions category.

Steve - could you elaborate on this? This has been a source of confusion for me since the press release on the Dodge/Cummins Bluetec was issued.



It has been my understanding that our trucks (heavy-duty pickup trucks >8500 pounds GVW) are regulated under the "heavy duty" emission regs (they're considered "light heavy-duty diesel engines" (LHDDE) - see http://www.dieselnet.com/standards/us/hd.html ). All HDDEs are required to meet 0. 01 g/hp-hr PM and 0. 2 g/hp-hr NOx by 2010 with a 50% phase-in (for NOx) starting in 2007.



However, the Tier 2 light-duty regulations included a category called "medium-duty passenger vehicles" which includes vehicles up to 10,000 pounds GVW that are used primarily for "personal transportation". According to Dieselnet, this category is "primarily" larger SUVs and passenger vans. This category is regulated by grams/mile rather than grams/hp-hr.



The Dieselnet press release specifically states that the Dodge/Cummins Bluetec 6. 7 meets the 2010 heavy-duty regulations:

... It is the first diesel vehicle on the market that meets the 2010 emission standards for heavy-duty engines (NOx = 0. 2 g/bhp-hr, PM = 0. 01 g/bhp-hr), and one of the first commercial applications of the NOx adsorber technology on a diesel engine... .

http://www.dieselnet.com/news/2007/01daimler.php





The Cummins press release seems to imply the heavy-duty regs, although the units aren't specified:

... Cummins is the first diesel engine manufacturer to have a product certified to the 2010 EPA heavy-duty engine standards for oxides of nitrogen (NOx) and particulate matter (PM) emissions, making it the cleanest heavy-duty diesel engine available in North America. The 2010 EPA standards for NOx (0. 2g) and PM (0. 01g) represent a more than 90 percent reduction in each pollutant, compared to the 2004 standards... .

http://www.cummins.com/cmi/content....enuId=4&overviewId=15&dataId=1136&menuIndex=0





However, I have seen other press releases (e. g,. on Green Car Congress) which suggest the 6. 7 Dodge/Cummins Bluetec meets the "Tier 2" emission regs (i. e. , light-duty), presumably the "MDPV" category.







Can you provide any clarification in this matter?

 

[Steve St.Laurent]

Sorry, but no I can't. That was just the information that I was given during the interviews.

 

[Russknh]

Are these engines running so clean now that we can get a special tax credit like a propane powered vehicle can? I guess if they get them any cleaner we can run them in the house for heaters?

 

[Cummins Cowboy]

I wonder how much diesel is being wasted by injecting extra into the engine so the cat can burn it, I predict this motor will not be much better than a BB gasser before long when it comes to fuel