Haven't been on this forum in a while so I am not sure if this has been discussed in the past few months. Back In February, Cummins unveiled their new fuel-agnostic strategy meaning that various engines in their line-up can be spec'd for different fuel types like propane, natural gas, hydrogen, and yes even gasoline. To clarify, that doesn't mean that one engine can run on all of these fuel sources, but rather you can have them spec'd to run on one of these fuels only and not just diesel. These engines will share 80% of their parts. From the head down these engines will be mostly the same as the current Cummins diesel. From the head up you will have different parts to for the various fuel types along with different fuel and air delivery systems. So essentially you will have the same reliable diesel engine components, but in gasoline form. They said that the B6.7L will be the first to be offered with its fuel-agnostic strategy in 2024. Medium duty customers will be able to spec the B6.7L to run on gasoline. I am not sure what plans Ram has for the 6.4L, but I would love to see a gasoline powered Cummins 6.7L turbo in a Ram HD. Not sure how they will handle the heat associated with gasoline turbo engines. What do you think? Cummins unveils fuel-agnostic internal combustion engine strategyCummins 6.7-liter gas engine part of new fuel agnostic strategy

Sounds really interesting! It's early in the morning, but Ima gonna go pop up some popcorn....

My question who would buy such an expensive Gas Engine???

Cummins12V98 wrote:My question who would buy such an expensive Gas Engine???With today's prices, I am not surprised anymore on what people will pay for stuff. Many will lay down $11k to go from a base trim package to a premium without batting an eye. Although I don't think this would be nearly as expensive as the Cummins diesel. You would not need a lot of the emissions equipment which would reduce a lot of cost and weight. You would also not need iron heads, a VG turbo, as large of an EGR and fuels system. So there could be a lot of cost and weight savings in a gas version.

ShinerBock wrote:Cummins12V98 wrote:My question who would buy such an expensive Gas Engine???With today's prices, I am not surprised anymore on what people will pay for stuff. Many will lay down $11k to go from a base trim package to a premium without batting an eye. Although I don't think this would be nearly as expensive as the Cummins diesel. You would not need a lot of the emissions equipment which would reduce a lot of cost and weight. You would also not need iron heads, a VG turbo, as large of an EGR and fuels system. So there could be a lot of cost and weight savings in a gas version.good to have you back shiner. chevman

There are a lot of turbo gassers out there. They do tend to be on the small side but the drag guys are building dual turbo big block hot rods also.I think it's good that Cummmins is thinking ahead to the future. We'll see what fruit that tree bears.

Cummins 6.7L Gasoline Engine in a Ram? | Good Sam Community

34 Replies

JRscooby
Explorer II
May 10, 2022
ShinerBock wrote:

It is not necessarily the fact that emissions systems on gas engines are figured out, it is just that the US EPA has a hard on against diesels and therefore have stricter requirements on diesels. Even though gas engines are more harmful to the environment due to their inefficiency and today's direct injected engines emit a lot of particulate matter, diesels emit a lot of NOx which is only harmful in very heavily populated areas. In les populated areas, NOx dissipates into the upper atmosphere and gets turned into a good thing since NOx is a helpful greenhouse gas which is also created by lightning, forest fires, and many other heat sources.

So, it is not that they just haven't gotten diesel emissions figured out, it is just that they keep getting stricter and stricter because the activist powers that be seem to have a disdain for them. If you look at all of our emission requirements and fuel economy test standards, they are all made to get the best possible outcome out of a gas engine, not a diesel or CNG vehicle. Although, after the SCR/DEF systems, they have been getting a lot better.

Not to get into a political discussion about which poisons are best, look at the history of pollution control on vehicles. The manufactures worked to clean the exhaust between ex valve and end of tailpipe. This caused a tremendous drop in performance and economy. My '73 Nova, (350, auto, steering brakes and air) would go about half as far on a gallon as my '72 half ton (350, auto, steering brakes and air). Bell, if drivers took the day off, and I worked my '72 F350 (360, auto ps,pb, and Holmes wrecker/body) I could come close to same MPG as the car.
But over time they have learned to clean up the combustion. Now we get much better power, better MPG, and cleaner exhaust.
At start, most pickups where used for work, not many miles so exempt. But because of the issues with emission equipment, more people started buying pickups just for transportation. This demand cause the cab to grow, and the bed to shrink to the point now most pickups look like the just forgot to put the trunk lid on. To clean the tailpipe of most passenger vehicles, had to regulate heavier and heavier trucks. Then we talk about diesels. We are in the part of evolution where we are trying to clean exhaust after made the mess is made. Performance/economy suffer, plus the failures of emission equipment reduce the dependability.
ShinerBock
Explorer
May 10, 2022
JRscooby wrote:
ShinerBock wrote:

Back in the day, I had the most powerful gas engine you could buy(plus mods) in a truck to tow my 8k lb trailer. Truck had a 4 speed and after one trip towing through the Texas hill country, I traded that truck in for my first diesel. I am not saying that the truck could not pull it, it just didn't do it to my preferences and expectations. Of course, everyone's preferences and expectations are different though.

So, don't get defensive about the "My trailer is too heavy for gas" (which is not what I said). I just said that diesel is the only way "I"(as in me, myself and I) would go with "my" trailer. Not saying a gas couldn't pull it, just that I wouldn't want to be driving any current gas engine HD to do it. If I had to pull it with a gas truck, then I would probably go with a Ford 7.3L unless this Cummins 6.7L gas engine comes out and it is turbocharged.

None of my 427s where built. I would call the parts department at GMC dealer, load new, not rebuilt, but new engine in pickup, and change it in a parking lot. All same as what was installed in new twin-screw trucks.
Now I was stopped for overload, driving a diesel, at age 14. But 6 years later, buying my own truck, I bought what I could pay cash for, worked it until I could upgrade. Hauling asphalt, first truck to plant got first load, and first truck to paver, first unload. Near a roadrace, grossing over 30 tons. All the 671s and some of the 871s could load behind me all day long. Now when we hooked up the pups I was EZ to pass.
My point is with the technology available back then engines burned gas, and moved what needed moved. Coupled with the fact that emission systems on spark fired engines are pretty well sorted out, and compression fired is not, I can see light duty, (less than 30,000 gross) might be better to use gas.

It is not necessarily the fact that emissions systems on gas engines are figured out, it is just that the US EPA has a hard on against diesels and therefore have stricter requirements on diesels. Even though gas engines are more harmful to the environment due to their inefficiency and today's direct injected engines emit a lot of particulate matter, diesels emit a lot of NOx which is only harmful in very heavily populated areas. In les populated areas, NOx dissipates into the upper atmosphere and gets turned into a good thing since NOx is a helpful greenhouse gas which is also created by lightning, forest fires, and many other heat sources.

So, it is not that they just haven't gotten diesel emissions figured out, it is just that they keep getting stricter and stricter because the activist powers that be seem to have a disdain for them. If you look at all of our emission requirements and fuel economy test standards, they are all made to get the best possible outcome out of a gas engine, not a diesel or CNG vehicle. Although, after the SCR/DEF systems, they have been getting a lot better.
FishOnOne
Nomad
May 09, 2022
ShinerBock wrote:
JRscooby wrote:
ShinerBock wrote:
FishOnOne wrote:
I think cummins see's the writing on the wall for the future of diesels in this market segment and the trend of more Hemi's replacing the cummins (My observation) so as a company they have to evolve.

Also I don't see Stellantis' designed 3.0 gas engine making it to the HD duty line up.

I think the fact that there are more gas engines in the HD segment than there used to be is not limited to Rams. With today's more powerful gas engine options and more gears, I see a lot more gas engines in the HD segment of all brands than I used to to. Of course, most of these are the guys that really didn't need a diesel to tow what they do and only had diesels before due to the dismal performance of the older gas engines. If I only had to to tow 10k, then I would likely have gotten a gas HD over a diesel. With my trailer, diesel is the only way I will go.

If I could of made a living running 20,000 miles a year I would of parked a 427 GMC the day I retired. As for "My trailer is too heavy for gas" back in the early '70s I would haul a load every day where my GCVW was about 55 tons.

Back in the day, I had the most powerful gas engine you could buy(plus mods) in a truck to tow my 8k lb trailer. Truck had a 4 speed and after one trip towing through the Texas hill country, I traded that truck in for my first diesel. I am not saying that the truck could not pull it, it just didn't do it to my preferences and expectations. Of course, everyone's preferences and expectations are different though.

So, don't get defensive about the "My trailer is too heavy for gas" (which is not what I said). I just said that diesel is the only way "I"(as in me, myself and I) would go with "my" trailer. Not saying a gas couldn't pull it, just that I wouldn't want to be driving any current gas engine HD to do it. If I had to pull it with a gas truck, then I would probably go with a Ford 7.3L unless this Cummins 6.7L gas engine comes out and it is turbocharged.

I had a '98 F150 5.4 and that thing was a turd with the 4 speed. Ran it in 3 gear and it towed like a champ but burned fuel like crazy.
JRscooby
Explorer II
May 09, 2022
ShinerBock wrote:

Back in the day, I had the most powerful gas engine you could buy(plus mods) in a truck to tow my 8k lb trailer. Truck had a 4 speed and after one trip towing through the Texas hill country, I traded that truck in for my first diesel. I am not saying that the truck could not pull it, it just didn't do it to my preferences and expectations. Of course, everyone's preferences and expectations are different though.

So, don't get defensive about the "My trailer is too heavy for gas" (which is not what I said). I just said that diesel is the only way "I"(as in me, myself and I) would go with "my" trailer. Not saying a gas couldn't pull it, just that I wouldn't want to be driving any current gas engine HD to do it. If I had to pull it with a gas truck, then I would probably go with a Ford 7.3L unless this Cummins 6.7L gas engine comes out and it is turbocharged.

None of my 427s where built. I would call the parts department at GMC dealer, load new, not rebuilt, but new engine in pickup, and change it in a parking lot. All same as what was installed in new twin-screw trucks.
Now I was stopped for overload, driving a diesel, at age 14. But 6 years later, buying my own truck, I bought what I could pay cash for, worked it until I could upgrade. Hauling asphalt, first truck to plant got first load, and first truck to paver, first unload. Near a roadrace, grossing over 30 tons. All the 671s and some of the 871s could load behind me all day long. Now when we hooked up the pups I was EZ to pass.
My point is with the technology available back then engines burned gas, and moved what needed moved. Coupled with the fact that emission systems on spark fired engines are pretty well sorted out, and compression fired is not, I can see light duty, (less than 30,000 gross) might be better to use gas.
JRscooby
Explorer II
May 09, 2022
mkirsch wrote:
sent PM

Any GMC Twin-Sixes?
ShinerBock
Explorer
May 09, 2022
JRscooby wrote:
ShinerBock wrote:
FishOnOne wrote:
I think cummins see's the writing on the wall for the future of diesels in this market segment and the trend of more Hemi's replacing the cummins (My observation) so as a company they have to evolve.

Also I don't see Stellantis' designed 3.0 gas engine making it to the HD duty line up.

I think the fact that there are more gas engines in the HD segment than there used to be is not limited to Rams. With today's more powerful gas engine options and more gears, I see a lot more gas engines in the HD segment of all brands than I used to to. Of course, most of these are the guys that really didn't need a diesel to tow what they do and only had diesels before due to the dismal performance of the older gas engines. If I only had to to tow 10k, then I would likely have gotten a gas HD over a diesel. With my trailer, diesel is the only way I will go.

If I could of made a living running 20,000 miles a year I would of parked a 427 GMC the day I retired. As for "My trailer is too heavy for gas" back in the early '70s I would haul a load every day where my GCVW was about 55 tons.

Back in the day, I had the most powerful gas engine you could buy(plus mods) in a truck to tow my 8k lb trailer. Truck had a 4 speed and after one trip towing through the Texas hill country, I traded that truck in for my first diesel. I am not saying that the truck could not pull it, it just didn't do it to my preferences and expectations. Of course, everyone's preferences and expectations are different though.

So, don't get defensive about the "My trailer is too heavy for gas" (which is not what I said). I just said that diesel is the only way "I"(as in me, myself and I) would go with "my" trailer. Not saying a gas couldn't pull it, just that I wouldn't want to be driving any current gas engine HD to do it. If I had to pull it with a gas truck, then I would probably go with a Ford 7.3L unless this Cummins 6.7L gas engine comes out and it is turbocharged.
mkirsch
Nomad II
May 09, 2022
JRscooby wrote:
As for "My trailer is too heavy for gas" back in the early '70s I would haul a load every day where my GCVW was about 55 tons.

They also moved a space shuttle with a Toyota Tundra. Doesn't mean you'd want to head off on a cross-country trip with it.

I'm guessing your 55 ton loads were relatively local, and if you hit 35MPH top speed you were really rolling.

Seriously though what were you driving? I am fascinated by the last of the big gasoline-powered haulers from the late 60's early 70's.

Any GMC Twin-Sixes?
JRscooby
Explorer II
May 09, 2022
ShinerBock wrote:
FishOnOne wrote:
I think cummins see's the writing on the wall for the future of diesels in this market segment and the trend of more Hemi's replacing the cummins (My observation) so as a company they have to evolve.

Also I don't see Stellantis' designed 3.0 gas engine making it to the HD duty line up.

I think the fact that there are more gas engines in the HD segment than there used to be is not limited to Rams. With today's more powerful gas engine options and more gears, I see a lot more gas engines in the HD segment of all brands than I used to to. Of course, most of these are the guys that really didn't need a diesel to tow what they do and only had diesels before due to the dismal performance of the older gas engines. If I only had to to tow 10k, then I would likely have gotten a gas HD over a diesel. With my trailer, diesel is the only way I will go.

If I could of made a living running 20,000 miles a year I would of parked a 427 GMC the day I retired. As for "My trailer is too heavy for gas" back in the early '70s I would haul a load every day where my GCVW was about 55 tons.
ShinerBock
Explorer
May 09, 2022
FishOnOne wrote:
I think cummins see's the writing on the wall for the future of diesels in this market segment and the trend of more Hemi's replacing the cummins (My observation) so as a company they have to evolve.

Also I don't see Stellantis' designed 3.0 gas engine making it to the HD duty line up.

I think the fact that there are more gas engines in the HD segment than there used to be is not limited to Rams. With today's more powerful gas engine options and more gears, I see a lot more gas engines in the HD segment of all brands than I used to to. Of course, most of these are the guys that really didn't need a diesel to tow what they do and only had diesels before due to the dismal performance of the older gas engines. If I only had to to tow 10k, then I would likely have gotten a gas HD over a diesel. With my trailer, diesel is the only way I will go.
FishOnOne
Nomad
May 08, 2022
I think cummins see's the writing on the wall for the future of diesels in this market segment and the trend of more Hemi's replacing the cummins (My observation) so as a company they have to evolve.

Also I don't see Stellantis' designed 3.0 gas engine making it to the HD duty line up.

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Cummins 6.7L Gasoline Engine in a Ram?

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