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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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  #21  
Old 04-20-2012, 07:27 PM
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Bikenut Bikenut is offline
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Originally Posted by Bikenut View Post
The ECU is just adjusting the motor to run on the higher octane which would respond better in mileage and performance IN A ENGINE CAPABLE OF BENEFITING FROM PREMIUM FUEL. Which the Camaro ss AND Hemi. ARE capable of!
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Originally Posted by brokenwrench66 View Post
Bingo! If your vehicle was designed to run 91 and you've been running 87, filling up with 91 then doing an ECU reset will have an effect.
We're saying the same thing in a different way
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  #22  
Old 04-22-2012, 06:46 PM
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I know they recommend 89 in the Hemi, but can it take full advantage of higher octane fuels?
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  #23  
Old 04-22-2012, 07:50 PM
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I know they recommend 89 in the Hemi, but can it take full advantage of higher octane fuels?
89 is the highest octane that you'll gain anything from. If you run 91 or 93 you'll end up with the same power and mpg as if you ran 89, and it's not "better" or "cleaner". It'd just be more expensive, and you'd promote carbon buildup(although minimally).
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  #24  
Old 04-22-2012, 08:46 PM
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I figured. Thanks!
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