Apparently the General Motors Gen VI engine will be out. Some say that with the mileage relaxation they might be going back to higher viscosities from the factory. Any other sources of info on the design?
GM Gen VI V-8 engine will be available in 2027
- Thread starter Snagglefoot
- Start date
- Joined
- Feb 6, 2025
- Messages
- 681
Multi-Cylinder Deactivation. No thanks.
EPA smackdown. Was long overdue. Now GM needs a smart CEO. Barra has been a disaster. She was gonna make all cars electric by 2035 or something. She was all in! 20 billion dollar loss for that stupidity.
100%
The rumors I have heard for Gen VI is they are increasing the displacement to 5.7L and 6.6L. My guess is the increase displacement is to better manage criteria pollutants (NOx, CO, HC, & PM) under load while also increasing the ability to use their dynamic fuel management (cylinder deactivation). I think there will be some power increase but I don't think it will scale linearly with the displacement increase. They are probably trying to squeeze every drop of efficiency they can out of these engines.
I read somewhere they are going down to one V8 option in 1500 series.
I could see that with the increase in displacement. The 5.7L for the 1500 series and the 6.6L staying with the HD series.
4wd
$50 site donor 2026
Already a rumor of a 6.6L edition for the Vette !
If the seats aren't improved, it doesn't matter what magical engine GM puts in them. It's like sitting on a hard flat park bench in my dad's last 3 Silverado LTZ's (2018, 21 & 24) and a couple of my uncle's High Country's. After about 20 min I'm shifting in the seat just to stay comfortable. Somehow Tahoe/Suburban/Yukon seats are great, but not the trucks.
As for the engines, let's hope GM has done more homework on the AFM system reliability, but we won't know for 4-6 years in likely. Also, the 10L80 could sure use some work.
As for the engines, let's hope GM has done more homework on the AFM system reliability, but we won't know for 4-6 years in likely. Also, the 10L80 could sure use some work.
Going for nostalgia. We can say we've got a 350 or 400 small block again! Though I guess no one really says that with the existing 6.6L...
The current Ram 5.7L HEMI V8 engine produces 395 horsepower and 410 lb-ft of torque, any guess on what the new Gen VI GM version will be rated at? They have always seemed to have less HP/TQ than their Dodge/Ford counterparts for similar sized engines.
Considering the Gen V L84 5.3L has 355hp and 383 lb-ft of torque, I'm going to guess the new 5.7L Gen VI will have 385hp/410tq. Maybe they will go on the side of performance rather than efficiency and make it a good 400hp/425tq for bragging rights.
The current Ram 5.7L HEMI V8 engine produces 395 horsepower and 410 lb-ft of torque, any guess on what the new Gen VI GM version will be rated at? They have always seemed to have less HP/TQ than their Dodge/Ford counterparts for similar sized engines.
Considering the Gen V L84 5.3L has 355hp and 383 lb-ft of torque, I'm going to guess the new 5.7L Gen VI will have 385hp/410tq. Maybe they will go on the side of performance rather than efficiency and make it a good 400hp/425tq for bragging rights.
- Joined
- Oct 25, 2021
- Messages
- 2,702
It needs to be 375hp/400tq minimum.
It would most likely be GPFs and cylinder deactivation. Those two systems are solving two different problems.
This seems like a pretty good guess. GM rarely goes for the all out biggest hp and torque numbers.
- Joined
- Nov 23, 2020
- Messages
- 742
The 5.3 is smaller than the 5.7 hemi, so it's going to have lower output. The Coyote is an OHC, so it's going to rev higher and produce more power for its size.
Scaling linearly, it would be around 382 HP/411 ft-lbs. But I'm sure they can increase the specific output. Otherwise, what would be the point? I'm shocked they haven't already added mild electrification. An electric motor mounted between the transmission and engine could smooth out shifts, boost power at all RPM, reduce ICE load at low RPM, improve engine braking, and enable smoother start-up/shutdown.
If the LS style engines are called "Small Block" then what is the big block, that is now used in cars and trucks?
They have zero resemblance to the real SBC. Its just nice that Chev performance still offers them and the real BBC as well.
They have zero resemblance to the real SBC. Its just nice that Chev performance still offers them and the real BBC as well.
I believe the “ big block” gasoline engines are gone. The turbo charged diesels have taken over. As for commercial trucks, 6 cylinder turbocharged diesels in huge displacements rule.If the LS style engines are called "Small Block" then what is the big block, that is now used in cars and trucks?
They have zero resemblance to the real SBC. Its just nice that Chev performance still offers them and the real BBC as well.
- Joined
- Feb 6, 2025
- Messages
- 681
I hate LS engines. Can't stand them. Would much rather have an old school SBC.If the LS style engines are called "Small Block" then what is the big block, that is now used in cars and trucks?
They have zero resemblance to the real SBC. Its just nice that Chev performance still offers them and the real BBC as well.
Similar threads
- Locked
