Cummins releases first gas engine

Very good to know, Cummins first ever gasoline engine.

From the article:
Cummins states the new engine runs on 87 octane gasoline, delivering diesel-like performance and reliability without the added complexity of DEF systems to meet regulations. On that front, the engine is both CARB and EPA compliant for 2027, though given the EPA's recent "biggest deregulatory action," those guidelines may be changing anyway. Specific fuel economy figures aren't mentioned, but Cummins claims the B6.7 Octane is 10 percent better versus comparable gas engines.

@Bryanccfshr thanks for posting!
 
Going back in time ! It was mostly all gas engines in trucks before diesels took over.
Only thing that will make the diesels any good now is for them to go back in time as well.
Back when it would be the only engine running on the day the earth stood still, the 1953 movie. Oh and EMP proof as well. :ROFLMAO: :ROFLMAO: :unsure:
 
Cummins first gasoline engine but not their first non-diesel engine. Cummins has built spark-ignition CNG engines for over a decade, starting with a CNG 12L version of the ISX.

Cummins has produced the B6.7N, a spark-ignition CNG engine, also based on the 6.7 B-series diesel (like the Octane), since 2018. Stellantis (and FCA previously) use this engine in their Detroit-area and Windsor day-cab fleet for transporting parts and assemblies between plants.

https://www.cummins.com/engines/b67n-2018

Additionally, Cummins recently rolled out the big X15N, a CNG version of the 15L X-series diesel. It makes 500 hp and 1,850 lb ft torque.
 
I will be curious to see where this engine goes. Seems like it could be great option to move away from the complicated diesel after-treatment systems. It doesn't seem particularly high cylinder pressures for a turbocharged engine with a BMEP (Brake Mean Effective Pressure) of 16.7bar. For comparison, here are a few different engine BMEP's, GM's 2.7L Turbomax engine is 27bar, Ram's 6.4L HD is 11.4bar, and Ford 7.3L Godzilla is 11.1bar.
 
1......if it meets current epa regs, then they will change the regs such that this engine needs more equipment to choke it to death

2......300 hp and 660 ft pounds is enough to do any work, of any size. I would love to have this much power at 1800 in a gas engine
 
Keep in mind that Cummins has been making LNG/CNG engines for over 30 years. Ever see the UPS tractors with frosted over fuel tanks, those are LNG engines. Many of the school busses here have Cummins LNG engines.

I suspect this new gas engine will be very good from the start because of the experience Cummins has with LNG.
 
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Is this engine really all that new? didn't they come out with a natural gas 6.7 almost a decade ago? I was thinking they'd redesign the head to make it have two plugs per cyl but it seems to only have 1 like the cng.
 
Seems impressive, until you realize that it's a turbocharged 6.7L engine that makes 660 ft-lbs. (It's not n/a). Hence, the numbers aren't really that impressive. Most modern gas turbos make very good torque across a broad rpm band. The article doesn't mention if the Octane is DI or not. Still, it's a good concept to bring an alternative to the market which isn't so reliant on massive extra equipment to meet emissions targets.

I suspect if Ford took the Godzilla engine, and put a turbo on it and tuned it for low rpm, it would make that kind of torque also.

Keep in mind that medium duty class trucks aren't about wicked acceleration and bragging rights at the Friday night bar scene. Durability and reliability are king when you're moving 30k pounds every day. So the Octane should meet their performance targets with a basis on a well-seasoned short-block design.
 
wwillson said:
Keep in mind that Cummins has been making LNG engines for over 30 years. Ever see the UPS tractors with frosted over fuel tanks, those are LNG engines. Many of the school busses here have Cummins LNG engines.

I suspect this new gas engine will be very good from the start because of the experience Cummins has with LNG.
Click to expand...
I am in the train of thinking that the Cummins used in the Fiat Rams is not on the same level as what is used in the marine and heavy duty applications.......kind of the same thing as the Allison transmissions used in Dmax trucks, not the same thing.
 
burbguy82 said:
I am in the train of thinking that the Cummins used in the Fiat Rams is not on the same level as what is used in the marine and heavy duty applications
Click to expand...
I suspect most components are the same.

The torque race has forced Cummins to strengthen and increase heat tolerance of many components of these engines. Those improvements certainly benefit the marine and trucking engines. It would be more expensive to maintain multiple designs instead of one design that all uses can benefit from.. My opinion.
 
MrHorspwer said:
Cummins first gasoline engine but not their first non-diesel engine. Cummins has built spark-ignition CNG engines for over a decade, starting with a CNG 12L version of the ISX.

Cummins has produced the B6.7N, a spark-ignition CNG engine, also based on the 6.7 B-series diesel (like the Octane), since 2018. Stellantis (and FCA previously) use this engine in their Detroit-area and Windsor day-cab fleet for transporting parts and assemblies between plants.

https://www.cummins.com/engines/b67n-2018

Additionally, Cummins recently rolled out the big X15N, a CNG version of the 15L X-series diesel. It makes 500 hp and 1,850 lb ft torque.
Click to expand...
And Cummins has engines that run on hydrogen!
 
dnewton3 said:
Hence, the numbers aren't really that impressive.
Click to expand...
300/660 at 1800, those are above dmax numbers in 2006. I guess it has to do with power per cubic inch, or something along those lines
dnewton3 said:
I suspect if Ford took the Godzilla engine, and put a turbo on it and tuned it for low rpm, it would make that kind of torque also.
Click to expand...
until it grenades or is parked for part being unavailiable
dnewton3 said:
Durability and reliability are king when you're moving 30k pounds every day. So the Octane should meet their performance targets with a basis on a well-seasoned short-block design.
Click to expand...
100% agree. This power level will move anything. Tanks of WW2 and into the cold war had this power level, weighing 20tons, and

https://en.wikipedia.org/wiki/M551_Sheridan#:~:text=External links-,M551 Sheridan,-25 languages
https://en.wikipedia.org/wiki/M4_Sherman#:~:text=External links-,M4 Sherman,-52 languages
 
burbguy82 said:
300/660 at 1800, those are above dmax numbers in 2006. I guess it has to do with power per cubic inch, or something along those lines
Click to expand...
I'm certain the power output is limited by durability requirements. More power = more heat and more heat = less engine life. Cummins can't risk getting a bad reputation with this engines just to brag about huge torque numbers.
 
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