2025 Cummins what will the engines and drivetrains look like

[User113]

Think about how much electricity an oven takes to heat stagnant air to 350°, and we need flowing air to be above 650° and closer to 1000° for a quick regen. I haven’t seen the specs on it, but it just seems far fetched to think it will eliminate need for extra fuel as I’ve also read about.

That would require a huge amount of electricity indeed. Just maybe that's why they chose to get rid of the grid heater!

What I would like to see is if they're using soot-free exhaust gas collected after the DPF for the EGR system! That would be a big improvement.

 

[Ozymandias]

What I would like to see is if they're using soot-free exhaust gas collected after the DPF for the EGR system! That would be a big improvement.

I wonder why absolutely no manufacturer does that as from our view it would make totally sense.

 

[AH64ID]

That would require a huge amount of electricity indeed. Just maybe that's why they chose to get rid of the grid heater!

I’m going to guess that the glow plugs draw a similar amount of amps, otherwise they wouldn’t be much of starting aid.

What I would like to see is if they're using soot-free exhaust gas collected after the DPF for the EGR system! That would be a big improvement.

I wonder why absolutely no manufacturer does that as from our view it would make totally sense.

I think the big reason is pressure. There is insufficient pressure post DPF to get exhaust to flow into the intake if you were to use post-DPF exhaust. The exhaust manifold pressure is always greater than the intake manifold pressure when the EGR is active.

 

[Diesel85]

I think the big reason is pressure. There is insufficient pressure post DPF to get exhaust to flow into the intake if you were to use post-DPF exhaust. The exhaust manifold pressure is always greater than the intake manifold pressure when the EGR is active.

How about throw a pump on it and pressure the cleaned exhaust gasses?

I'd love to work for Cummins and test theories out.

 

[AH64ID]

You could cool it and put it into the turbo intake, but the change in flow response would be much slower than it is now.

I rather see an after treatment only solution.

 

[Mikey-KE7LBB]

What I would like to see is if they're using soot-free exhaust gas collected after the DPF for the EGR system! That would be a big improvement.

I wonder why absolutely no manufacturer does that as from our view it would make totally sense.

Caterpillar used this very system from 2007 up until they got out of the highway truck market. After I saw this setup on a couple of 2011 trucks, I wondered why nobody else was doing things this way. They called their system CGI and it seemed to work alright.

Edit: The first post explains the CGI system https://www.forddoctorsdts.com/forums/topic/574-cat-clean-gas-induction/

 

[User113]

This CGI system was patented by Caterpillar in the US on an application filed December 3, 2002. It was assigned to the United States Department of Energy presumably because they may have provided a grant or something like that for its development. Your tax dollars at work!

That patent expired January 1, 2023.

Caterpillar filed another application for a simplified version on February 23, 2007 that provides many of the same benefits but this application was rejected in light of the patent noted above. This application is now abandoned.

Hopefully others will start trying to implement it in the near future.

 

[NIsaacs]

Some info here, CP8 and looks like the turbo is back to a center outlet, nice!

 

[NIsaacs]

Ram build/price is up. Appears to be a $1200 drop over the '24.

https://www.ramtrucks.com/2025/ram-2500.html

 

[nukegm]

ii wonder when ram will move production of the HDs back to the us? good video above. dang these things are getting expensive. cost is approaching my first house purchase in 1995. cheers all!

 

[Topzide]

cost is approaching my first house purchase in 1995. cheers all!

Same here with my 1994 home purchase!

 

[Turbo Terry]

Lots of nice changes The filters all top side very nice. Makes me want a new truck. We will see in the future if they turn out good

 

[AH64ID]

Lots of nice changes The filters all top side very nice. Makes me want a new truck. We will see in the future if they turn out good

There are definitely some nice new features, and definitely some things I prefer about my '22.

 

[User113]

I’m going to guess that the glow plugs draw a similar amount of amps, otherwise they wouldn’t be much of starting aid.

All of my vehicles with glow plugs ran them on 14ish gauge wire (2 Mercedes Benz, 1 Volkswagen, 2 Jeeps, 1 Kubota). My Liberty CRD not only uses 14 gauge wire for each glow plug but also runs the glow plugs at a mere 7v; a subsequent factory revision switched them to 5v glow plugs. Not much power at all, but all the heat is all concentrated on a tiny cherry red spot in the combustion chamber.

The Cummins Intake Air Heater uses two relays that each provide 95A at 12v (190A is a lot of amps!). I wasn't able to find the wire gauge in the wiring diagram, but the manual refers to them as "heavy duty cables." Air is not a really great medium for transferring heat, which is why the intake air heater requires so much more power to provide enough heat to make a meaningful difference inside the cold cylinders after that air travels through the cold intake manifold and cold head. Not nearly as efficient!

 

[sag2]

I wonder why absolutely no manufacturer does that as from our view it would make totally sense.

The last generation Ecodiesel had low pressure EGR (post CAT) in addition to the normal EGR taken pre CAT.

 

[Ozymandias]

ii wonder when ram will move production of the HDs back to the us? good video above. dang these things are getting expensive. cost is approaching my first house purchase in 1995. cheers all!

Sorry but no, I prefer the mexican quality over the lazy thrown together trucks from the past.

 

[crispyboy]

Watched the video.
I understand the reasoning behind moving the catalyst next to the turbo. It seems like a lot of extra heat under the hood to bake and make brittle wiring and the other components under the hood. I hope Ram can move a lot of air under the hood.
Also their banter about changing the oil quicker was kind of funny. You still need a certain amount of time to drain the oil properly and the tech or the DIY shouldn't shortcut this procedure.

 

[Cummins12V98]

Sorry but no, I prefer the mexican quality over the lazy thrown together trucks from the past.

I have to disagree, I have owned two USMade 2nd gen trucks. Both with over 400k now and have been top quality. Paint for example is still good, both 98’s. Now my 01 Sport clear coat is falling off.

When I bought my 98 12V I figured the truck would fall apart around the engine, not true.

 

[Grumpy8811]

Watched the video.
I understand the reasoning behind moving the catalyst next to the turbo. It seems like a lot of extra heat under the hood to bake and make brittle wiring and the other components under the hood. I hope Ram can move a lot of air under the hood.
Also their banter about changing the oil quicker was kind of funny. You still need a certain amount of time to drain the oil properly and the tech or the DIY shouldn't shortcut this procedure.

looking at the obvious, this clean air stuff hit the market in the thate 2000's and since then all diesel emissions systems no matter the brand are entering their 2nd or 3rd change in design.

very true the closer to the engine the more efficient they can make the emissions system operate.
I'm somewhat surprised RAM hasn't went with the One Box approach..

I suspect, give them another 20 years and there will be no more complaints about this stuff than we heard about emissions systems on cars in the 80's.

 

[Ozymandias]

I have to disagree, I have owned two USMade 2nd gen trucks. Both with over 400k now and have been top quality. Paint for example is still good, both 98’s. Now my 01 Sport clear coat is falling off.

When I bought my 98 12V I figured the truck would fall apart around the engine, not true.

I know a 98 and an 01 and both fit and finish and quality of body and interior parts is far from being adequate for this MY compared to production abroad.
I'm a big fan of the US - but parts and goodsquality often lacks because of lack of pride in the work they do.
Sometimes you get stellar products, but as often you get cheap crap thrown together for a high price and advertised as the greatest since sliced bread.