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2025 Ram 2500/3500 6.7 Cummins

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Grumpy8811

does Cummins actually call the new 6.7 engine

  • Grumpy8811
  • Replies: 39
Ozymandias said:
Yeah, stepping up from a Gen2 to a Gen4 is a huge lap forward, almost like centuries in between these two.
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sometimes I look at the latest greatest stuff in motor vehicles and just say to myself " would yall just stop with all the nonsense".

even when it comes to power outputs and such.. or speeds in the transmission..
you go back to the 90's and the barely cracked 200hp/400 torque with a 4 speed automatic and now 375/850 with a 6 speed is considered a slug. :) If I can climb a hill without losing speed I'm good to go..anything more is just wasted potential, much like myself. :) .
 
Grumpy8811 said:
sometimes I look at the latest greatest stuff in motor vehicles and just say to myself " would yall just stop with all the nonsense".

even when it comes to power outputs and such.. or speeds in the transmission..
you go back to the 90's and the barely cracked 200hp/400 torque with a 4 speed automatic and now 375/850 with a 6 speed is considered a slug. :) If I can climb a hill without losing speed I'm good to go..anything more is just wasted potential, much like myself. :) .
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But now they make the same hill, without dropping down several gears, and overheating the engine. Better to have and not need than need and not have. At least that has been my motto on several things.

.
 
Same here, it's barely out the showroom, why do you want to modify it before it has run a couple hundred thousand miles to show where there are actual problems, not the imagined that the aftermarket tell us.
 
Ozymandias said:
Same here, it's barely out the showroom, why do you want to modify it before it has run a couple hundred thousand miles to show where there are actual problems, not the imagined that the aftermarket tell us.
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Exactly, I even asked a question on here about regens and MPG. No one has yet to respond.

Just not enough people owning the yet.

Then the warranty factor. But I do get it, some have disposable income to buy $100k truck, to modify it at 100 miles and the heck with the warranties. Wish I was one of those, lol!
 
Diesel85 said:
Exactly, I even asked a question on here about regens and MPG. No one has yet to respond.

Just not enough people owning the yet.

Then the warranty factor. But I do get it, some have disposable income to buy $100k truck, to modify it at 100 miles and the heck with the warranties. Wish I was one of those, lol!
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yeah, reality is hardly anyone has driven the latest greatest long enough to have made any valid observations.
 
Jim W said:
WHY?
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Ozymandias said:
Same here, it's barely out the showroom, why do you want to modify it before it has run a couple hundred thousand miles to show where there are actual problems, not the imagined that the aftermarket tell us.
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Strictly for the engine. Not performance. The less exhaust being pumped back into the engine, the longer it will last, and the fewer parts will be clogged up. It doesn't matter how new the engine is, if it has and EGR on a Diesel engine, it will eventually cause problems. Always has.
Now, if the engineers created an EGR cooler that was easily accessible, easily cleaned(like a clothes dryer) then that might be a game changer.
 
Rowdy Dalton said:
Strictly for the engine. Not performance. The less exhaust being pumped back into the engine, the longer it will last, and the fewer parts will be clogged up. It doesn't matter how new the engine is, if it has and EGR on a Diesel engine, it will eventually cause problems. Always has.
Now, if the engineers created an EGR cooler that was easily accessible, easily cleaned(like a clothes dryer) then that might be a game changer.
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You must be reading my mind. I was going to work this past Monday and I was thinking of some kind of user serviceable EGR filter.
 
Wow, I guess they do exist, but not for the RAM trucks.

I can say that I like what RAM did on my Gen 3 EcoDiesel, where by they route the EGR post-DPF. CAT does the same thing on some of their large engines to reduce EGR/intake soot loading. I'll point out key words -- reduce -- not eliminate.

From what I can see, the new 25+ Cummins don't do that, as they still yank the pre-DPF exhaust gasses right into the EGR cooler. Surprised they didn't do a post-DPF EGR route due to the fact that they moved the whole setup closer to the engine.

I do find that the most problematic pieces of diesels is the EGR systems due to the soot. Which FWIW, also happens on gasoline engines, mostly the direct injection ones that produce more soot due to the inherent design that run swirl valves. I do own a non-DI gasser that the swirl valves are prone to sticking due to a manked up intake manifold (2007 F-150 w/4.2l V6) after 100k+ miles due to the soot. Well known issue for that engine.
 
Ozymandias said:
After the DPF there should be no soot by design, that's why the tailpipe is stays spotless.
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There is still a little bit of soot (very tiny amount that gets past over time), which is gray burnt soot. Actually, I think that would be called ash, scientifically at that point.

If you've ever got a chance to get some of that, it is the weirdest feeling material. It's super light, and it feel granular, but if you smoosh it in between your fingers it smears like normal ash does. We had a DPF fail in a Bobcat loader, and I was curious to see inside of it. It was plugged with that gray ash stuff. All it wanted to do was get airborne.
 
Diesel85 said:
I can say that I like what RAM did on my Gen 3 EcoDiesel, where by they route the EGR post-DPF. CAT does the same thing on some of their large engines to reduce EGR/intake soot loading. I'll point out key words -- reduce -- not eliminate.

From what I can see, the new 25+ Cummins don't do that, as they still yank the pre-DPF exhaust gasses right into the EGR cooler. Surprised they didn't do a post-DPF EGR route due to the fact that they moved the whole setup closer to the engine.
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The 3.0 has upstream (high pressure) and downstream (low Pressure) EGR. There are still conditions that require it to be pulled pre DPF.
 
Diesel85 said:
There is still a little bit of soot (very tiny amount that gets past over time), which is gray burnt soot. Actually, I think that would be called ash, scientifically at that point.

If you've ever got a chance to get some of that, it is the weirdest feeling material. It's super light, and it feel granular, but if you smoosh it in between your fingers it smears like normal ash does. We had a DPF fail in a Bobcat loader, and I was curious to see inside of it. It was plugged with that gray ash stuff. All it wanted to do was get airborne.
Click to expand...
The current DPF's are about 99.9% effective. You should be able to wipe the inside of the tailpipe and get nothing on a clean rag. If you do it isn't operating at full efficiency.
 
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Turbo Diesel Register
Issue 128 – Digital Version
Digital Magazines
FREE!
TDR Test Drive - Digital Edition
Renew
Subscribe
Gift Subscriptions
Back Issues
Subscription Status
Address Change Form
Buyer's Guides
Ram Diagnostic Trouble Codes
The Perfect Collection
The Perfect Collection Vol. II
TSB Updates
Dodge/Cummins Historical Overview
Cameron Collection
What Makes Us Tick?
Product Showcase
Advertising



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