The 6.4 Hemi (392 Hemi) is projected to be in the 2011 Dodge Charger SRT8 and 2011 Chrysler 300C SRT8. Numerous changes will be made from the 392 Hemi in the Challenger Drag Pack. Horsepower estimates range from 450 to 500 at this point; and a new, expensive but sturdy eight-speed automatic transmission might be developed to go along with
it (and to be used in trucks with Cummins turbodiesels).
There have been rumors of MultiAir being used with the Hemi, though J. White wrote, “If you look at the 5 year plan, no MultiAir Hemi was listed (not even as a potential powertrain).” Bob Sheaves added:
[The Hemi is] tightly packaged — with poor angularity of the pushrods between the lifters and rockers on both sides of the combustion chambers, and hot spots and poor manufacturability of the cooling cores due to the positioning of the components. This caused the problems passing emissions on all of the hemi engines.
Adding MultiAir will take a complete set of engine castings, necessitating complete cooling system reconfigure, emissions predictions,
flame optimization, combustion chamber optimazation, and a whole raft of other stuff.
It would take three years minimum from the start of program approval, (6 months before that for a concept design that mightbe feasible) to enter production.
Hemi: (HEM -e) adj. Mopar in type, V8, native to the United States, carnivorous, eats primarily Mustangs, Camaros, and Corvettes. Also enjoys smoking a good import now and then to relax. - David Charles Gedraitis
The new Hemi has been immensely popular. In 2005, Hemi engine take rates was around 45% on vehicles offering the engine. In some cases,
it appears to be the main reason why people buy the car or truck around
it.
The first generation 5.7 liter Hemi (which was the third generation Hemi) produced roughly (
it varies by car/truck) 345 horsepower (5,600 rpm) and 375 lb-ft of torque (4,400 rpm) from 5.7 liters (345 cid*) when used in the Dodge Ram - one horsepower per cubic inch.
The second generation 5.7 Hemi (the fourth generation Hemi) produces up to 390 horsepower and 407 lb-ft of torque in the 2009 Dodge Ram 1500, using variable cam timing;
it shuts off four cylinders when possible to get good mileage. The same engine produces 375 horsepower in the 2009 Dodge Challenger R/T. (This is the fourth generation Hemi if one counts all the original “small” Hemi V8s as the first generation, the 426 Hemi as the second generation, and the original 5.7/6.1 Hemi as the third; but
it is the second generation 5.7.)
G1 5.7 (Ram) G1 5.7 (Charger) G2 5.7 (Ram) G2 5.7 (Challenger*) 6.1 SRT8
Horsepower 345 @ 5,600 340 @ 5,000* 390 375 @ 5,800 425 @ 6,000
Torque 375 @ 4,400 390 @ 4,000 407 398 @ 4,200 420 @ 4,800
2008 EPA mpg 13/17 15/23 13/19 16/25 13/18
The 6.4 liter version, at a historic 392 cubic inches and projected to reach 450 hp is due in calendar-year 2010 as a replacement for the 6.1 liter SRT8 engine. The crate version builds 505 horsepower; because
it’s for racing (and is not street legal or street practical), some sacrifices made for longevity, gas mileage, and emissions reduction have been removed.
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Chrysler - V8 Hemi
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Originariamente Scritto da _hainz 
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