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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 06-24-2011, 02:04 PM
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snrusnak snrusnak is offline
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Default 4.7L with 4.10's and LSD

I'm considering as my next mod to change my open diff 3.55 to a LSD 4.10, but would like some input on gas mileage from you guys that have this with the new 4.7L. Also welcoming input from 3.92 and 4.56 guys I'd like to see city and highway comparisons to my current 17-18city and 19-20hwy. I'd like to do this mod next as the 4.7 is slightly lacking power at lower rpm's. Thanks in advance.
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  #2  
Old 06-24-2011, 10:54 PM
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I had 3.92 as factory on my 03 and put in 4.10s, man major night and day difference. Practically drives itself now...
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  #3  
Old 06-24-2011, 11:02 PM
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great info thanks, how's your gas mileage?
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Old 06-24-2011, 11:06 PM
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Not sure, it's got to be better because I don't have to push the gas down as hard to get where I need to go. Don't go so much on rpm's as much as vacume. RPMs are higher but not by much but i'm using less vacume which means less gas to move the vehicle.
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Old 06-24-2011, 11:09 PM
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I see, do you know how many rpm's your at at freeway speeds? Thanks for the input! Do you have open differential or limited slip?
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Old 06-24-2011, 11:12 PM
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I can't remember I'm going on the freeway tonight I'll let you know my 65mph and 70mph and maybe my 90mph depending on freeway congestion lol!
I have a detroit locker posy rear end, had it all done at once, works great lots of power whenever I need it in both wheels.
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Old 06-24-2011, 11:17 PM
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that'd be great then I can compare to what I have now, thanks! and don't get killed on my account haha!
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Old 06-24-2011, 11:20 PM
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Don't worry I'm a Paramedic, driving fast is my profession, and cops always let us off from tickets. But your right safety first
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Old 06-24-2011, 11:26 PM
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snrusnak snrusnak is offline
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at least I look responsible...
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Old 06-25-2011, 09:33 PM
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Alright, so it looks like 1800-2000rpm at 65-70mph, it will also depend on the angle your driving(uphill or downhill)
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