New Duramax numbers 305/495

[f8l vnm]

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 ? 

[GearheadSS]

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.

[l0s3r421]

I'm pumped.  Glad i placed the order specs unknown.

[Ghostbone311]

2 hours ago, GearheadSS said:

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.

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

[l0s3r421]

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.

[jaslon]

What were the numbers before? Fuel economy unchanged?

[Dirk13]

14 minutes ago, jaslon said:

What were the numbers before? Fuel economy unchanged?

277/460

 

No MPG numbers reported. 

[4banger]

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

[newdude]

Wow, this is good.  LB7 territory out of an all aluminum, emissions compliant inline 6 diesel.  

[Dirk13]

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. 

 

 

[4banger]

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. 

 

 

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

[Dirk13]

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.

[4banger]

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

Edited August 16, 2022 by 4banger

[4banger]

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!

[shakenfake]

Why wouldn't they just continue with their 2.7?