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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 09-15-2010, 09:11 PM
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Originally Posted by moparmike07 View Post
87 and 89 no real differnece i used to run 93 when truck was tune. the 93 gas is really for like sport cars that use high compression engine need high octane gas so the engine does not knock which cause engine failure. if you hear it knock then you should change. Also a lower octane gas tends to build a carbon film on your cylinder heads. Usually, you won’t notice the difference in engine performance for the most part since most of your driving occurs in the city. The carbon film inside your cylinders will be confirmed if you open the engine to replace your head gasket when you rebuild your engine head or when you want to do an engine overhaul. Only then you will see what the different octane gas will do to your engine. So if you plan to keep checking your head gasket see what gas to use then you can do that. The ping that some people notice in their vehicles happens because the compression ratio changes due to the carbon build up which affects your timing chain performance.


Some of this is half true, and the rest is a mixture of fact and fiction.
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Old 09-15-2010, 09:17 PM
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"Timing Chain Performance"
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Old 09-15-2010, 11:33 PM
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o copied it off a website didnt really read it went to Google and typed it in like i said i don't see the difference i know when to use 93 and 87
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