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Old 06-12-2011, 03:12 PM
wylie wylie is offline
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Join Date: Feb 2011
Location: Lone Oak, Texas
Age: 69
Posts: 220
Gender: Male
Vehicle: 2011 Dodge Laramie 1500 CC
Trim Level: Laramie
Color: Blue
Engine: 2009-2010 345ci (5.7L) Hemi V8 390hp 407lb/ft
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Default plugs

In 2008 all 4.7 engines have 2 plugs per cylinder.EGR and knock sensors were added in 2005. In model year 2008, Chrysler replaced the 4.7 liter V8 with a new version. Power went from 230 hp to 290 hp (and up to 320 lb-feet of torque) with that move; gas mileage went up, and noise and vibration went down. The new 4.7-liter V-8 features 5.7-Hemi features such as two spark plugs per cylinder, with a high 9.8:1 compression ratio, and better port flow; but it has a new slant/squish combustion system design.
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