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The End for Hemi is closer with 3.0L Inline-6 finally here

8.5K views 33 replies 15 participants last post by  63gearhead  
#1 ·
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Standard output: 400 hp / 450 lb-ft

High Output: 500 hp / 475 lb-ft

“90 percent of peak torque available from 2,350 rpm to redline”
 
#5 ·
there are a few companies bringing inline 6's back. i always thought they went away because they couldn't get the emissions right

in any case, i think I6 has its application as does a v8, no matter what the power output is. and im referring to NA gas. i would rather have a big NA v8 in my truck.

generally, you can manage to get more torque from I6 but it doesn't rev as high. they are also longer and have more NVH than a v8, but probably give you better overall engine bay room unless they are transversely mounted

i wonder if they'll still do a version of the MDS, or if they'll just do the stop/start like the v6s. i haven't really read up on these engines too much.

regardless, the future of ICE doesn't look good because it seems to be getting done by force. i wish they would just allow for a natural evolution of things, that would honestly make for better systems overall. incentives work better than punishments. hopefully this will not be another version of what happened to the auto industry in the 80s, but it seems to already be happening. all these companies that were ditching bigger NA and immediately putting something smaller with turbos to compensate. a lot of them did not or are not doing well
 
#8 ·
Hate to see the HEMIs go for sure. But I guess it's been coming for some time. And just as Chase300 stated, as long as the 3.6L V6 is on the 'chopping block' too, I'm all for it. I think it's a FANTASTIC little powerhouse, but good God, the valve train issues!! It's 2022 and they still haven't been addressed!!
 
#13 ·
BMW has proven a silky six is a worthy powerplant in a luxury vehicle...so I can see Jeep buyers having no issue with this TT 6 over a NA V8.
A lot of pickup buyers have bought in to Fords turbo mills..so as long as it proves reliable, I think most truck buyers will buy into this 6 being a Hemi replacement as well.
If you like to tune or mod your engines, nothing better than turbo engines as far as bang for the buck.
As far as sound..they can pipe in any sound into the cabin today, I believe BMW already does that.
That said, it certainly is not going to be a replacement for the Hellcat engine which I hope will still be offered even if its a super premium option.

On EV's, until battery tech advances EV's are not going to outperform ICE engines when towing. There are several Rivian R1T towing tests and its range is reduced 65+% when towing 2/3 max capacity!!! So that 300 mile highway range becomes only 100 miles when towing. With an EV pickup you going to have to stay local when towing..or be retired and have extra days to spend charging trying to get to that campground across the state.
 
#20 ·
As far as sound..they can pipe in any sound into the cabin today, I believe BMW already does that.
That said, it certainly is not going to be a replacement for the Hellcat engine which I hope will still be offered even if its a super premium option.
lost me 1000% on that.. I’d rather drive a sweet sounding anemic 4.6L than higher powered anything with “synthetic” sounds (or bad sounds in general).
I actually stopped shopping for an M3 (post E46) after I heard the new engines.
 
#14 ·
What is wrong with turbos in trucks? Most 18 wheelers are turbo powered diesels.
A turbo V6 puts up SICK numbers in both horsepower and torque and those numbers are in the 250k engine life most manufacturers strive for.
A turbo straight 6 would be easy maintenance and can be built to withstand the high pressures of a turbo with no problem and be able to rev to the moon if needed.
My brother had an 89 Dodge Daytona Carol Shelby 2.2L turbo and it ran great and he put 80k of no problem miles on it when he owned it. And he drove it pretty hard.
If you think about how far engine and sealing technology has come since 89, you can rest assured turbos are great IF and only IF auto makers don't pull bean counter moves.
 
#17 ·
Nothing is wrong with turbo trucks. I had a '12 cummins and it was awesome and I hate having to get rid of it. But that was a DIESEL with 6.7 liters. Nothing wrong with I6 either, my 05 wrangler has the 4.0, and it's been solid. I would have a problem owning a full sized truck pulling a camper that is an all-alluminum 2.7L turbo, I just don't trust it at this point. And i know there's been improvements to that engine, too
 
#16 ·
Look at the boxer engine it's sideways and works great. Engine height is nothing to worry about as there a lot of ways to handle it.
Internal or overhead cam design, suspension design, dry sump oil systems, bigger hood bulges ( 🤩) etc.
 
#27 ·
Here's another thing to think about:

The inline six with turbos is touted as having higher mpg as compared to the existing V8s. However, with 20+ psi boost, you probably will be limited to 91 octane gas to get the nominal 15% fuel efficiency increase. Currently, 91 octane fuel is a nominal 20% higher than 87 octane fuel. So even though you are getting better mpg overall, you are spending more $$ to add the gas. So you are saving gas, but spending more money to do so.

As per previous post, where is the non-turbo version of this engine?
 
#28 ·
this is a twin turbo inline 6 and should be pretty smooth, this configuration is almost all that BMW uses right now. there will be no non-turbo version according to the articles. but honestly this is what everyone else is doing. turbos and computer management make the engine much more fuel efficient. especially in the EPA standardized calculation. I've heard those are fairly low loads on the engine and make a smaller turbo engine really shine per the calc.


I wouldn't expect much turbo lag in an engine like this. an I6 is usually torquey to start with. and with smaller turbos, computer management and all that manufactures have learned about routing the plumbing/placement of the turbos lag is cut way down.

some turbo lag maybe at very low end, but honestly couldn't be that different from the 'lazy throttle tip in' that we all experienced with previous model year HEMI's.
 
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#29 · (Edited)
I think the miss on this engine is not being able to run 87 octane in the non-HO version...if that is what is being reported. I'd be happier if it made the 400+hp on 87...rather than require 91. Which means on 87 it probably would make the same 375hp as the current 5.7L.
Also might get 2mpg more highway...but probably 2mpg less towing..and probably a wash around city.

I'm sure the turbos are very small for quick spin up as they are pushing some big boost through the engine...that said I've not driven a turbo engine equipped vehicle yet that I can't notice any turbo lag..though most won't notice.
 
#34 · (Edited)
Maybe not in my lifetime but certainly in my 22 year-old son‘s lifetime, who I hope carries on the tradition as a dinosaur ICE gear head, maybe living the reality just like in Rush’s Red Barchetta:

“My uncle has a country place, that no-one knows about
He says it used to be a farm, before the Motor Law
And on Sundays I elude the ‘Eyes’, and hop the Turbine Freight
To far outside the Wire, where my white-haired uncle waits…

Down in his barn
My uncle preserved for me an old machine –
For fifty-odd years
To keep it as new has been his dearest dream

I strip away the old debris, that hides a shining car
A brilliant red Barchetta, from a better, vanished time
We’ll fire up the willing engine, responding with a roar!
Tires spitting gravel, I commit my weekly crime…

A gleaming alloy air-car shoots towards me, two lanes wide
I spin around with shrieking tires, to run the deadly race
Go screaming through the valley as another joins the chase…”