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Old 06-22-2006, 02:22 PM   #1
NYCshopper
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Default Info regarding Chrysler NEW 4.0l V6 engine (for 2007 Chrysler Pacifica & Dodge Nitro)

Info regarding Chrysler NEW 4.0l V6 engine (for 2007 Chrysler Pacifica & Dodge Nitro)



Press Release:
Quote:
More Power and Outstanding Manners Define Chrysler Group’s New 4.0-liter V-6

The 4.0-liter is the most powerful naturally aspirated V-6 in Chrysler Group’s lineup - 255 hp and 265 lb-ft of torque

Engine noise, vibration and harshness are greatly reduced for a refined driving experience

The 4.0-liter will be available in the 2007 Chrysler Pacifica and Dodge Nitro

Auburn Hills Mich, Jun 22, 2006 -
The leading goals guiding the development of the new Chrysler Group 4.0-liter SOHC V-6 were impressive low-rpm torque and extremely smooth and quiet operation.

“When we decided to create a more powerful V-6 for Chrysler Group vehicles, we invested in building on the dependable 3.5-liter V-6,” said Bob Lee, Vice President, Chrysler Group Powertrain. “The new 4.0-liter V-6 delivers more power than any naturally aspirated V-6 engine in our vehicles, and does so with world-class smoothness and refinement.”

The new engine has impressive low-rpm torque that will give customers very good engine response around town and provide the power they expect from a world-class V-6. The 4.0-liter V-6 produces 255 hp @ 6,000 rpm and 265 lb-ft of torque @ 4,200 rpm. The engine produced 15 more lb-ft of torque at peak power rpm, and as much as 35 lb-ft more torque throughout the power curve.

Specific changes from the 3.5-liter engine for improved power include:

Crankshaft stroke increased from 2.47 in. (81 mm) to 2.78 in. (91mm)
Displacement changed from 214.7 cu. in. (3.518 liters) to 241.2 cu. in. (3.952 liters)
New camshaft profile featuring higher lift and revised timing events
New upper intake manifold with improved flow
Compression ratio raised from 10.0:1 to 10.2:1
Equally important are the decreases in engine noise, vibration and harshness (NVH). More than 10 engine characteristics were designed specifically for minimal engine noise, and to ensure that the sound would remain pleasing to the driver. The result is an engine with equal or better NVH qualities than competitive benchmark engines.

Specific changes from the 3.5-liter engine for decreased NVH include:

Increased main-bearing width and diameter
Tighter crankshaft balance spec
Select-fit rod bearings
Reduced reciprocating mass piston assemblies
Added ribbing to the sides of the engine block
Increased pan-rail thickness on block
Direct-mount oil pan to transmission bell housing
Thermoplastic valve cover
New "low rumble" intake manifold
Intake lobes splayed
Equal length exhaust

The 4.0-liter V-6 utilizes an semi-permanent mold cast aluminum block with iron liners and cast-aluminum cylinder heads. It is a single overhead camshaft (SOHC), 24-valve engine. The engine is produced at the Trenton Engine Plant in Trenton, Mich., and will debut first in the 2007 Chrysler Pacifica, followed later this year by the 2007 Dodge Nitro.
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Last edited by NYCshopper; 06-22-2006 at 02:32 PM.
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Old 06-22-2006, 02:44 PM   #2
amdmaxx
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not bad, still trailing europeans/japanese
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Old 06-22-2006, 03:20 PM   #3
happasaiyan
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255/265 from a 4L?
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Old 06-22-2006, 05:07 PM   #4
modvp
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The Nissan 4.0 produces 270/290 in the pathfinder!
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Old 06-22-2006, 06:08 PM   #5
chenc544
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I think here is the problem.

Quote:
Originally Posted by NYCshopper
It is a single overhead camshaft (SOHC), 24-valve engine.
Apparently the Japanese and Europeans have figure out a way around the old saying "There is no replacement for displacement"...
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