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-   Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 (http://www.ramforumz.com/forumdisplay.php?f=13)
-   -   installed a magnaflow exhaust, NEED HELP (http://www.ramforumz.com/showthread.php?t=74317)

mark1963 02-13-2011 10:59 PM

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
mark:doh:

moparmanicac 02-14-2011 09:01 AM

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

RamTech 02-14-2011 09:09 AM

Reduced back pressure would cause a loss of torque in the lower rpm band but not a loss of power on top end.

mark1963 02-14-2011 07:31 PM

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,,

BigOrange 02-14-2011 09:04 PM

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.

foxcrazy90 02-14-2011 09:31 PM

how does it sound??

mark1963 02-14-2011 09:50 PM

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

916Timmy 02-14-2011 10:18 PM

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!!!


Before
http://i13.photobucket.com/albums/a2...y/IMAG0376.jpg
After
http://i13.photobucket.com/albums/a2...y/IMAG0380.jpg

mark1963 02-15-2011 12:50 AM

is your magnaflow an open muffler as well, and did it take a little time for your computer's characteristics to change,???

916Timmy 02-15-2011 01:27 AM

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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