my 3.9 and magnaflow help please - Dodge Dakota Forum : Custom Dakota Truck Forums
V6 Performance Upgrades for your 3.7 or 3.9 V6

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post #1 of 12 Old 08-26-2009, 09:38 AM Thread Starter
 
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my 3.9 and magnaflow help please

ok guys I just got a si-so magnaflow for my truck. all I did to install was cut the stock muffler and clamp the maggy on with some sealer to keep the leakage away. so far it sounds.. meh.. ok I guess. very ricey actually and im not sure why. why does this one sound so awesome ?

does the cat-back really make that much of a difference? what can I do to get that lopey-ness sound like in the video. when I started the truck with just the muffler dumping underneath the bed it sounded awesome at idle and I figured getting the muffler hooked back up to the rest of the stock pipeing it would sound better but now it has no cool idle and just a buzzy yet bassy tone. what should I do guys?
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post #2 of 12 Old 08-27-2009, 07:17 AM
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im not sure but some other treds around here have some better mufflers i think i also read mags are not good for the 3.9 (cuz i have a 3.9 and look for mufflers) cuz it makes the msound ricy

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post #3 of 12 Old 08-27-2009, 07:39 AM
 
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with it dumped under the bed it uses the entire bed as a giant box. thus making it louder. the sound goes to the ground then up to the bed and back, which is what gives you some of that metallic sounds. its also a 3.9 you can't expect too much. if you have it exit out of the side of the truck it will sound different.

edit: just more after re reading........... do you know what mods are on the truck in the video? that could also be an factor. i ran a single 3" through a flowmaster (i ran a spintech eventually) when mine was a v-6. dumped before the axle. when you get on it it deff sounded like the sound was bouncing all around under the bed

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post #4 of 12 Old 08-27-2009, 12:21 PM Thread Starter
 
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ya on the comments he states no mods just a cat-back. I have 1.7 rr's, v8 tb, and intake. Im thinkin i should have gone flowmaster. I heard a grand prix that sounded cooler than the truck today. it has a lope to it. I even have higher lift and the truck has no lope with this damn muffler. 90 bucks i wish i wouldnt have spent.
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post #5 of 12 Old 08-27-2009, 06:11 PM
 
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well lope doesn't come from just lift. its the entire set up of a cam that will make it sound lopier. i honestly think you are expecting too much out of just a muffler. you cold always put a cam in............. this video is my v-6, Vortech, 1.6 rr, custom cam, 3" exhaust with a flowmaster. and a few other lil things

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post #6 of 12 Old 08-29-2009, 12:54 PM Thread Starter
 
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I think my problem may be how close the muffler is to the cab. I had to shorten the pipe between the cat and the muffler so i could dump it out before the tire out the side. sounds okay up to about 2k rpm and than sounds annoying. what if I mounted the muffler closer to the axle and than just had a straight pipe out after that to the back. btw would it sound crappy if I took a y-pipe and dualed it after the muffler?
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post #7 of 12 Old 08-29-2009, 03:27 PM
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first off how long has this been on the truck? The sound will continue to change for the first 150 miles as the computer learns it. Get a fartmaster and suffer the consequences above 2000 rpm's. The muffler will also change tone after use. This is true for all mufflers IMO whether they are chambered or not.

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post #8 of 12 Old 08-29-2009, 08:19 PM
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I had the same problem with my v6, sounded nice at idle but up top it was a ricer..best thing i ever did to the exhaust on my v6 was put another 2 cylinders infront of it


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post #9 of 12 Old 08-29-2009, 09:11 PM Thread Starter
 
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post #10 of 12 Old 11-09-2009, 03:28 PM
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Magnaflow ricey??

I also have magnaflows on my 3.9 ltr 03 dakota...but they sound really good, the only thing it could be is what type of magnaflow muffler you got put on it. If you get it installed professionally and welded on you will be a lot better off also.


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