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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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  #11  
Old 01-07-2011, 10:59 PM
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916Timmy 916Timmy is offline
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I run 89 for now until the DSP is in, then it's all 93 and smiles from there!
A little artice I read on differences in fuel octanes!
http://www.straightdope.com/columns/...nd-regular-gas
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  #12  
Old 01-07-2011, 11:13 PM
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I have to say I use the best one at the pump. Here it is 94oct. I use it since I like to put only the best stuff into my truck. With my 07 having the tunner in it the better octane does make a difference
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Scat Pak SS/T Edition 2007 Ram 5.7L HEMI A.K.A BLACK HORNET
Performance- DS Predator w/91oct Tune, Gibson CB, BFI CAI, E-Cutout, Jet Stream Scoop, 180 Tstat, Optima Yellow Top.
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  #13  
Old 01-07-2011, 11:20 PM
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I run 87 and once and a while I put 89 in it, I used my Predator and set it to the 87 performance tune and it runs good with 87 but there is a little more pep with the 89. I use to run the 93 performance tune but the gas price is just too much anymore and besides with the 87 tune it runs just as well and MPG is good 18 to 19 hwy 13 to 14 in town if you take it easy LOL.
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