Quote:
Originally Posted by Tru2Chevy
The problem was (to the best of my knowledge) the additional emissions controls that were added at the same time.
Fundamentally the engines are the same, and I know several parts are interchangeable.
- Justin
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Dodge/Cummins tried to get ahead of the emissions curve with the 6.7L engine meeting the new 2010 standards before all others. Didn't quite work out the way they had planned. The 5.9L Cummins is (or at least was) the only medium duty rated diesel available in a pickup truck. A 5.9L cummins in dodge trim is heavily de-fueled. If you look at medium duty Ford chassis (F600's and up, like a 26' box truck etc.) they came with Cummins power or Cat power, not a powerstroke. Chevrolet was the same way, the medium duty trucks don't run the Dmax, they step up to Cat power (or did anyway). I don't think Cat is in the on road diesel game anymore because of the emissions crap. I think they are solely making engines for off-road use only now, so I don't know who is supplying Chevy their medium duty engines (isuzu?). But either way the upgraded power plants are I6's not V8 variants. Not starting a diesel war, just getting the facts out there. I'm not sure of the exact reason for the I6 versus V8 deal. Its got something to do with the architecture/strength/packaging. An I6 is just a simpler engine to build versus a V8, especially as the displacement gets really really big (Cat's big dog is 15.2L and Cummins is 15L, about 1000 cubes). I think just about all of the big on road diesels are I6's.
For the pickup truck segment, I think the Duramax is the current king, especially when you consider the Allison automatic it is mated to. Like was stated earlier, competition is a good thing, so lets hope dodge and ford get their end figured out.
I love my 5.9l 12v engine cummins. As long as I can keep the dodge part from falling to pieces around it, it will be with me a long time. 225,000 is coming up fast, so she is just about broken in.
