7.2L Cummins Rumors

[Brutal_HO]

Just a friendly FYI.

We will not allow posts to clickbait sites/youtube (like below image) to be posted here. Any of these will be removed and subject to a warning.

We don't need to give these fake clickbait generators, and there are many of them, any airtime. It just perpetuates the rumor mill.

 

[superjoe83]

I wonder if ram will use any of the features of the B6.7 octane in the future diesel engines? The main differences i see are the overhead cams and integrated engine brakes

 

[thecastle]

Not electric regens at all. Fuel is still used for regens.

All the heaters are for is fast DOC and SCR warmup to combat NoX at low load and cold start.

So basically the 48v system is another complicated emissions control device that will fail. Has nothing to do with improving emissions system and engine reliability.

Thank you for clarifying, I had should have looked since the drive train is now released. I had just been going on the per-release memories of what the rumors were.

I wonder if ram will use any of the features of the B6.7 octane in the future diesel engines? The main differences i see are the overhead cams and integrated engine brakes

Only if the Octane engine features offer some sort of financial advantage in a diesel application.

One thing I have noticed in the B7.2L spec's from cummins is a drop in the max RPM's of the engine (governed speed), compared to the B6.7. IF the B7.2L becomes a reality for the RAM pickups I wonder if the lowered redline will be along for the ride? I suspect this is likely as the B6.7 is listed as having a bore/stroke of 107MM/124MM and the B7.2 is listed as having a the same bore 107mm but a longer stroke of 133mm. Good for torque production, good for thermal efficiency (potentially). But it will mean a potentially lower redline vs the 6.7 which means could lead to poorer volumetric efficiency. In English, because the B7.2 can't rev, it won't likely make much improvement in HP (probably similar today's engines), but it should make more torque. So just a guess, it might easily match fords 1200lb-ft, but it will have less HP than ford.

 

[GirchyGirchy]

I wonder if ram will use any of the features of the B6.7 octane in the future diesel engines? The main differences i see are the overhead cams and integrated engine brakes

The B7.2 is basically the diesel version of the Octane, so it's more likely that any future iteration of the Ram engine will borrow more from it than the gasser. There are plenty more differences, btw; not only between the current Ram engine and Octane, but between Octane and the B7.2 diesel.

I really don't know squat about the next version of the Ram engine, which I'm assuming will be a 2031MY based on the six-year cycles we've been releasing on. Given the fact it's now a unicorn in the Cummins lineup, I certainly wouldn't be surprised to see it go OHC. Again, that's just my ramblings as an enthusiast, because I truly know nothing at this point.

 

[brv10]

I could say some things but I have to keep my mouth shut.

 

[RebelForge]

Emissions would be my bet for a 48V alternator. Since cummins has migrated to using an electric powered heating element to do DPF regens. Which consumes a lot of electricity and this reduces the AMP draw and needed wiring gauge. About time. The system of using post injection events to send un-burnt fuel to the DPF to heat it for a Regen was always a poor design choice by RAM. It was cheap to implement (which is why it was picked) but leads to increased fuel consumption, and more oil dilution with fuel which is a problem for drivers who take short trips and frequently regen. It was never a very good strategy, others avoided this (GM) put an extra injector in the exhaust to solve the fuel dilution issue.

I thought the 25+ threw a 7th injector into the DPF for regens?

 

[johnmyster]

I thought the 25+ threw a 7th injector into the DPF for regens?

Correct, as did Ford some years back.

 

[mbarber84]

I thought the 25+ threw a 7th injector into the DPF for regens?

They did. The 2025+ 6.7 engines in the Ram trucks (not the same engine as B6.7 commercial engines) now have a downstream dedicated hydrocarbon injector which is used to fuel the active regeneration process. This reduces the dependence on the engines primary fuel injectors and lowers the fuel dilution contaminant concerns that come with more frequent DPF regeneration.

The electrically heated DPF system will be implemented into the the commercial side. There has been no definitive information that this system will be applied to the Ram trucks and the 6.7 series engine. As of now, the 7.2L is solely set to be implemented into the commercial sector not Ram trucks. Maybe we’ll see it one day, but it’ll be a while.

 

[Brutal_HO]

They did. The 2025+ 6.7 engines in the Ram trucks (not the same engine as B6.7 commercial engines) now have a downstream dedicated hydrocarbon injector which is used to fuel the active regeneration process. This reduces the dependence on the engines primary fuel injectors and lowers the fuel dilution contaminant concerns that come with more frequent DPF regeneration.

The electrically heated DPF system will be implemented into the the commercial side. There has been no definitive information that this system will be applied to the Ram trucks and the 6.7 series engine. As of now, the 7.2L is solely set to be implemented into the commercial sector not Ram trucks. Maybe we’ll see it one day, but it’ll be a while.

Not according to every d*ckhead facebook group clown suckered into some clickbait link. ;-)

 

[mbarber84]

Not according to every d*ckhead facebook group clown suckered into some clickbait link. ;-)

You’d think by now people would know you can’t believe everything you see on YouTube. After all, that’s how WW2 got started.

Im not sure which talking head clickbait is my favorite…

Ram’s are getting a 7.2 Cummins in 2027

Lee Zeldin is eliminating diesel emissions completely

Or

Anna Nicole married for love.

I’d throw “artificial sweeteners were safe” in there but im addicted to the stuff so im unwilling to admit my own flaws.

And we all know there were WMD’s in Iraq.

 

[brv10]

You have to keep in mind that the intent of the 7.2’s development was to create a direct replacement for the 6.7L. They’re not going to create a direct replacement engine that is substantially larger or heavier than the engine it’s designed to replace. That would add costs to the manufacturers using that engine and also have negative impacts on the end-user.

As for the 2500’s low payload, you can thank Ram for that. They could easily bump that payload up by changing the suspension and choosing to allow the trucks rating to go beyond the 10k limit, but they refuse to do so. Personally I think they should ditch the coil link and go back to conventional leaf springs. Even then, the 10k gvwr is something Ram is choosing not to expand on.

Might require a different frame and crash testing

 

[mbarber84]

Might require a different frame and crash testing

I hope one day we see it.
A new cab at the very least. Maybe by the time I’m ready for another Cummins truck we’ll have a new cab? In the meantime I’ll keep bombing around in the hurricane. Wickedly fast little truck and very comfortable. My kids love the extra space in the cab.