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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 08-17-2010, 10:55 PM
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JackDaniel JackDaniel is offline
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Default Fuel n exhaust

Godddddd, I feel like a chach for asking this, but this is my first hemi so here goes. What kinda fuel do yall use?!!! Premium or regular? the dealership said they used premium but Im not sure the compression is so high that it would need it? so what do yall run? Also, I have a single straight piped exhaust from the cat back, is that killin my power? Or not so much...cuz it sounds amazing but like everyone Id like to get the most from my Beeeeeee. Thanks everyone!
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Old 08-17-2010, 11:04 PM
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A CAI, dual exhaust and diablo tuner seem to be the big 3 here.
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  #3  
Old 08-17-2010, 11:21 PM
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I try to run super in my 6.1 when I'm running around town and so forth . When I go on a long trip , I'll step it down because I'm gonna be at a steady crusin speed and not really laboring the engine . I have gotten 23 mpg with my SRT8 300 doing 75 - 85 mph with the a/c on . Not bad .
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Old 08-18-2010, 04:46 AM
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Using 89 is the recommended octane for the hemi, but I run the supreme in mine due to the custom tune that I run. If you're not running a tune then you can get away with the standard 87 octane with no ill effect.
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Old 08-18-2010, 05:14 AM
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Yeh it says 89 octane in the manual.
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Old 08-18-2010, 06:37 PM
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thanks much i appreciate it
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Old 08-19-2010, 12:42 AM
wallym777 wallym777 is offline
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I used 89 in my 2006 and use it in my 2010.
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