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Why the difference in year models?
Hi i was searching on internet, looking for some Hemi 5.7 specs, and i just found that the models 2009 have 388 hp, and my 2006 have 330, what can be the difference?, some mods that we can make, i already running KN CAI, Magnaflow Exaust, im planning to add the Diablo Trinity but i dont know if am close to the 388?
I think most of the time it's computer upgrades that make the engine push more gas maybe or does something with RPM curve that gives it a better power band. They might have also increased the in and out air like you already did. The only way for you to tell what you have is to get it dynoed. You should be able to find a shop that does it for around $50.
Join Date: Dec 2008
Location: Denver, CO
I heard that in 2008 on the 4.7L V8s they added a second spark plug at the bottom of each cylinder to ignite any unburned fuel or something - which increased the HP from 235 to 305...maybe they did something similar with the Hemi.
Join Date: Feb 2010
Location: San Antonio, TX
Own a Commander?: Yes
Model year: 2006
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
If 4WD - system: QT-I
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