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Diving into new Mopar V8s

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24K views 118 replies 54 participants last post by  66coronet  
#1 ·
Rumors of a new Mopar V8 engine have been flying around for a while. This mysterious engine, to replace the entire Hemi series, is largely an unknown; but we’ve collected some rumors and speculation. None of this has been verified. First, our industry experts say that, while they might try to keep the efficient Hemi […]
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#5 ·
But really nothing new about the future engines. V-8's continue as a premium. Displacements dropping with more turbo's coming.

We could have a long unproductive argument about how V8's are unjustly being phased out...
 
#13 ·
Anyone able to do the math on 5.7L and 6.4L fuel economy in an, oh, I dunno, 3600-3800lb car? Might be all the savings they need right there considering MDS would be engaged more often. I always figured a 6.4L in a 3000lb A-body would be 4cyl all the time until you floored it. 30+mpg highway and 10's at the strip.
 
#14 ·
The modern "super turbo" gas Engine has put almost Everything on its head just like the "super diesels" has done.
- its hard to justify a big v8 when a small 2 litre four can do Everything better except the sound at lower consumption, lower wheight, less space and lower cost.
- still its what sells tha gets made....
 
#18 ·
3600lbs. is how much my 300M weighs. There's no way a full-size sedan will be any less than 4k lbs with the modern safety gear and crash protection needed (my LH has thinner A pillars, no seat airbags, no side curtain airbags, knee airbags, etc) unless they go full aluminum.
 
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#29 ·
This has kind of been the talk for a long time. Ma Mopar went to 4 and V6 as the only engines in its cars starting in the 80s, FWD was all you could get until the charger Sedan/300, and a truck was the only V8 available while that was happening. I have been saying for years a 4.0 Hemi would be great, in the history archives the 241 is the smallest Hemi you could get. Put a pair of turbos on that, have one run 4 cylinders and one to push the other four cylinders in MDS mode and mileage would be at least 30+mpg.
 
#30 · (Edited)
The Hemi design head is poor for emissions. That is why even the current Hemi engine is a semi-Hemi. The Hemi design will be dead for the next generation of engines. I can see FCA calling any head design a hemi no matter what the real design is.

"Some are calling the engine a "semihemi" because combustion chambers are not perfectly spherical; each chamber is slightly filled in with metal on the sides opposite the twin spark plugs.

"It must have hemispherical combustion chambers or it's not a hemi," says legendary drag racer Don "Big Daddy" Garlits, now retired and living in Ocala, Fla. Garlits used the 426 Hemi in his Swamp Rat dragster in the 1960s and 1970s.

"The situation is that we have a true hemispherical chamber except for a few cubic centimeters of material added to each side of the chamber," says Robert Lee, Chrysler group's director of rear-wheel engine engineering. "And that's done to channel the flow and get the burn characteristic we wanted with the dual (spark) plugs. That's the only possible area that people could quibble about." "



Read more: http://autoweek.com/article/car-news/hemi-or-semi-chrysler-groups-new-345-hp-57-liter-engine-powerful-just-same#ixzz4pBuScLQa
 
#32 ·
If the hemi or semi hemi is killed by emissions, can fca, will fca call the new v8 a hemi? I would want some feature to have something to do with hemispheres if it Carey's the name. Kind of a no fake hood scoops or fender vents thing I have.
Also. If the new v8 is smaller physically, (maybe pentastar v8?) to fit a smaller engine bay, and the current hemi still viable and update able, we won't see the new designs for some time. Will trucks move to inline 6? Will there be much of a reason to even have a v8 at all unless it is ( all new-co developed) from Ferrari? My guess is the 'mercun v8 is gone. Long live Italian micro v8s. Not a bad thing. 8-9k redline flat plane crank? They do sound awesome.
 
#33 ·
So there might be 1 v8 in the future that may (or may not) be a Hemi, and it seems like it'll be less than 6 liters.
I wonder what kind of variety there would be if that's the case. Like the v10 of old and the pickup v10, or the srt 6.4 and pickup 6.4. Then options like supercharging or turbocharging some. Something like a standard 5.9 that goes to all vehicles, a srt version, and supercharged srt version. Maybe a beefier version for the HD pickups. The pickups, especially the HD's and chassis cabs, will have to have something with some grunt. I see a lot of HD's running around with the Hemi instead of the Cummins.

I guess I'll have to wait and see.
 
#36 ·
Why not revive the Magnum nameplate for a future V8? I think a fully modern 5.2 (318) would be perfect, similar to how the 5.0 ford is. CGI or aluminum block, direct injection, port injection, and so forth.
 
#43 ·
I'd expect to see v8 hemi's in future top tier lines (ie SRT) as mild hybrids for performance, with bonus better economy and emissions reductions. Turbo's will just get you v8 mileage and emissions in anything but steady, lazy cruising. There's already in house tech doing just that. 400hp 5.7 (or smaller) plus 100hp hybrid assist?
 
#50 · (Edited)
Been asking for a small non turbo for years, sounds like it will be made with unobtanium. Sorry but I'm not getting into the suggestion that a 4 banger will be better. Gonna stick with WHOEVER makes a reasonably priced V6.

Actually I would take electric over all of them for low end torque. Looks like a change in gas engines will drive a lot of people there.