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New Duramax numbers 305/495


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Holy surprise! GM is not messing around.  New numbers with 10A make this a really sweet engine if it was hot before.  305/495

does this mean a power bump to the 6.2 is coming ? 

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28 minutes ago, f8l vnm said:

Holy surprise! GM is not messing around.  New numbers with 10A make this a really sweet engine if it was hot before.  305/495

does this mean a power bump to the 6.2 is coming ? 

No bump for the 6.2L.  The 2023 specs for the 6.2L were published when the order guide went live and it was unchanged.

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11 minutes ago, Ghostbone311 said:


anything new/changed for the AT4 in the 2023 order guide? Is that guide listed any where?

 

Really just the forced OnStar addon.  Everything else, aside from a few colors and the new dmax,  are the same as 2022.

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33 minutes ago, jaslon said:

What were the numbers before? Fuel economy unchanged?

10% more hp, 8% more torque....expect fuel economy about 9% less than before...real world. Fuelly.com averages on the 277/460 about 10.6 l/100km or 22.2 u.s. mpg so after a couple years of the new tune on Fuelly.com for overall averages bet you see about 11.5 l/100km or 20.5 mpg. I said it here first 😉

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14 minutes ago, 4banger said:

10% more hp, 8% more torque....expect fuel economy about 9% less than before...real world. Fuelly.com averages on the 277/460 about 10.6 l/100km or 22.2 u.s. mpg so after a couple years of the new tune on Fuelly.com for overall averages bet you see about 11.5 l/100km or 20.5 mpg. I said it here first 😉

22.2 us mpg?

the overall average for 2020 trucks says 23.1 and 2021 says 24.8

 

Fuelly needs to update their engine options for 2022, 3.0 isn’t listed yet. 

 

 

B0B687B2-0B9B-47D7-830A-548139FD6239.thumb.png.e28333d3cd3d6117d6ad095a90f8fc89.png

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1 hour ago, Dirk13 said:

22.2 us mpg?

the overall average for 2020 trucks says 23.1 and 2021 says 24.8

 

Fuelly needs to update their engine options for 2022, 3.0 isn’t listed yet. 

 

 

B0B687B2-0B9B-47D7-830A-548139FD6239.thumb.png.e28333d3cd3d6117d6ad095a90f8fc89.png

yes when I researched all at the same time it was a little higher, in Silverado 1500 there are 145 trucks and if you filter that engine in GMC Sierra 1500 there's 200 more, the average looking like a few ticks lower than 10.6, over the 345 trucks and the 3 years there's minus that one random chevy stating only 10 mpg...the average now is 23.3 mpg or 10.1 l/100km. It changes every day but it's come down 0.5 l/100km or 1.1 mpg since I compared all the gm half ton options, so adding 9% to that average would be 11.0 l/100km or 21.4 mpg

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7 minutes ago, 4banger said:

yes when I researched all at the same time it was a little higher, in Silverado 1500 there are 145 trucks and if you filter that engine in GMC Sierra 1500 there's 200 more, the average looking like a few ticks lower than 10.6, over the 345 trucks and the 3 years there's minus that one random chevy stating only 10 mpg...the average now is 23.3 mpg or 10.1 l/100km. It changes every day but it's come down 0.5 l/100km or 1.1 mpg since I compared all the gm half ton options, so adding 9% to that average would be 11.0 l/100km or 21.4 mpg

That one random Chevy also says it’s a 2019. The 3.0 wasn’t a thing in 2019 so I didn’t even mention it and it should be taken out of any statistical analysis.

 

We’ll see if the new engine gets 9% lower fuel economy but a 9% increase in power doesn’t automatically mean that.

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11 minutes ago, Dirk13 said:

9% increase in power doesn’t automatically mean that.

 

for the curious it will do for now, it won't be any worse than this guess, until someone has better a + b = c this would be a worst case but something got turned up, more air, more fuel 😉

 

maybe you get 9% more powah with only 5% more fuel? someone here maybe wicked smaht and can get a closer guess...just did it quick for fun

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The gen 1 cummins came rated at 5.9 liter, 160/170 hp and 400/410 ft/lbs torque (manual/automatic)....extra long stroke, 1200 lb motor, but they did a million miles...this little 3.0 is half the size doing now nearly double the hp and 85/95 ft/lbs more torque in a 500 lb motor, longevity won't be the same likely with all this emissions nonsense and I'm sure quite a bit more cylinder pressure to make that sort of power out of half the discplacement but dang the future has been bright

 

I bet we see a gas powered version of this motor at some point. You heard it here first. They need a bit more jam over the 2.7 to keep up with ford/ram...the 2.7 pretty maxed out but I hear cummins is working on a gas powered 6.7 cummins, ford working on twin turbo 7.3 gas Godzilla, chev will be working on a heavy duty turbo to compete with the big boys also, so what will they do for the half ton gas turbo? I think it'll be this 3.0 converted. Great numbers with diesel so far!

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