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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 02-13-2011, 10:59 PM
mark1963 mark1963 is offline
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Default installed a magnaflow exhaust, NEED HELP

i just had a cat-back single into duel out on a stock engine, the magnaflow muffler is an open muffler, you can look right thru it there is no baffle in it, it seems i lost top in power, could it be because i lost back pressure ??? please help, what can i do,

thanks
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Old 02-14-2011, 09:01 AM
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Not to sure about your miffler specifically but a loss of back pressure could be your problem. But I had a thrush welded on my dakota and that was nothing but a tin can and I did not have a problem w/ loss of power due to back pressure
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Old 02-14-2011, 09:09 AM
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Reduced back pressure would cause a loss of torque in the lower rpm band but not a loss of power on top end.
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Old 02-14-2011, 07:31 PM
mark1963 mark1963 is offline
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i would like to thank everyone who replyed about my little power issue, when i had a tune-up done they installed some low cost AUTOLITE #5224, i replaced them with CHAMPION RC12MCC4 from the dealer, WOW WHAT A DIFFERENT A SPARK PLUG CAN MAKE,,
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Old 02-14-2011, 09:04 PM
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wait and run a couple of tanks of gas through it.... This will give some time for the computer to adjust to the new flow characteristics. I went through the same thing.
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Old 02-14-2011, 09:31 PM
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how does it sound??
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Old 02-14-2011, 09:50 PM
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it sounds great!!! it seems like it came back to life by removing the autolites & changing back to the factory champion plugs, if she wakes up any more by the computer ajust to the new flow characteristics, well all i can say is WOW,!! the gas mileage has already increased,,

thanks
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Old 02-14-2011, 10:18 PM
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Very nice call....my 18" Magnaflow took the truck some getting used to! I also re-welded a new Y pipe in, so it was a big change. It runs like a beast now!!!


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Last edited by 916Timmy; 02-14-2011 at 10:25 PM.
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Old 02-15-2011, 12:50 AM
mark1963 mark1963 is offline
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is your magnaflow an open muffler as well, and did it take a little time for your computer's characteristics to change,???
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Old 02-15-2011, 01:27 AM
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It is, it's a straight through design. I just had a shop "build" me a complete cat-back. Saved some money and got all the same stuff as a kit and then some It rus great now. I hear you can pull the fuse to the ecm and it will learn the airflow faster than without doing it, but I didn't do it. Just drive it. Your Ram will learn!
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