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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 06-01-2011, 11:00 PM
Flat Spot Flat Spot is offline
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Default 22" Magnaflow installed today - Love it!

I've been reading these post for a couple of weeks now trying to decide which Magnaflow to go with. I installed a Magnaflow cat-back system on my Tacoma last year and found the drone to be too much for me. I had to install a resonator to reduce the drone, but after it was installed I lost the low growl of the muffler. I didn't want to have to do that again. I was very close to going with the 18", but was afraid it would be too agressive for me. I'm almost 37 if that has anything to do with my taste.

I decided to go with the 22 and found that it was perfect for me. Everything else is stock. The sound is certainly more aggressive, but not obnoxious by any means and NO DRONE! I got a couple looks tonight in the Home Depot parking lot when I started it up and drove away.

I hear that the full Magnaflow cat-back system uses the 22 without the resonators and there is no drone. I wonder if I remove mine if it would be to much. For now I'll stick with just the muffler as I'm happy with it. I may do the Y pipe next, but not sure how much it will help.
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Old 06-02-2011, 11:27 PM
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but where are the pics? Glad you got the sound you wanted!
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Old 06-05-2011, 09:27 PM
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Yep, gotta hear it AND see a pic of your truck.
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Old 06-05-2011, 09:29 PM
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I'd leave the resonators on. The muffler will get a little bit louder as it gets some mileage on it.
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Old 06-05-2011, 10:33 PM
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Quote:
Originally Posted by MADDOG View Post
I'd leave the resonators on. The muffler will get a little bit louder as it gets some mileage on it.
Wonder why they do that?
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Old 06-07-2011, 09:48 AM
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Quote:
Originally Posted by northernblue View Post
Wonder why they do that?



Sound absorption: A sound absorbing muffler contains a large amount of sound-absorbing material (very often fiberglass) aka "Glass-pack"
that soaks up whatever sound enters the muffler – sort of like screaming as loud as you can into a pillow. Sound still gets out, but it’s not nearly as loud.

Magnaflows have a straight flow through design with a perforated central core wrapped in acoustical fiber fill that eventually deteriorates and burns off
...as a result it gets a little louder and deeper over time giving it a more of a straight through performance.



----------------------------------------------------------------------------------------


Sound cancellation: Sound cancellation requires sophisticated design to be effective, but conceptually it’s very simple.
Sound waves are “bounced” into one another so that they cancel one another out. Cancellation is accomplished using baffles that cause sound waves to reverberate inside the muffler.


Chambered mufflers, like Flomaster with multiple chambers to muffle the sound.




------------------------------------------------------------------------------------------------------

Sound absorbing mufflers are the most common type, and almost every muffler uses some combination of these two methods.

The stock muffler is a chambered design with perforated pipe, no baffle material.

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Old 06-07-2011, 11:43 AM
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ya dont remove them i did that and once i hit the highway OMG when the 4 cly thing kicked i had them put back on
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Old 06-07-2011, 02:08 PM
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Default

Quote:
Originally Posted by BlackRamHemi View Post


Sound absorption: A sound absorbing muffler contains a large amount of sound-absorbing material (very often fiberglass) aka "Glass-pack"
that soaks up whatever sound enters the muffler – sort of like screaming as loud as you can into a pillow. Sound still gets out, but it’s not nearly as loud.

Magnaflows have a straight flow through design with a perforated central core wrapped in acoustical fiber fill that eventually deteriorates and burns off
...as a result it gets a little louder and deeper over time giving it a more of a straight through performance.



----------------------------------------------------------------------------------------


Sound cancellation: Sound cancellation requires sophisticated design to be effective, but conceptually it’s very simple.
Sound waves are “bounced” into one another so that they cancel one another out. Cancellation is accomplished using baffles that cause sound waves to reverberate inside the muffler.


Chambered mufflers, like Flomaster with multiple chambers to muffle the sound.




------------------------------------------------------------------------------------------------------

Sound absorbing mufflers are the most common type, and almost every muffler uses some combination of these two methods.

The stock muffler is a chambered design with perforated pipe, no baffle material.

Excellent answer, thanks for that.
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Old 06-10-2011, 09:31 AM
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if you consider removing a reso...dump it AFTER axle to keep the cab quiet and still maintain a muscular tone outside...


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