Interior Resonance with Cat Back Exhaust
Professional
Joined: Dec 2005
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RE: Interior Resonance with Cat Back Exhaust
ORIGINAL: dakoduh
extdak-
I'm not sure does the sweptside come out behind like stock or in front of the rear tire? Mine is just the 3" that goes the same way as stock. It replaces everything from the y pipe back with 3" pipe and one muffler. HTH
extdak-
I'm not sure does the sweptside come out behind like stock or in front of the rear tire? Mine is just the 3" that goes the same way as stock. It replaces everything from the y pipe back with 3" pipe and one muffler. HTH
That's what I have...
Saying good bye to the stock crap.
Veteran
Joined: Jul 2006
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RE: Interior Resonance with Cat Back Exhaust
Yea it's the single that bolts up in the stock location,I was wondering if it did away with the forward resonator,the Flowmaster Force IIkitdoes anybody have one and does it do away with the forward resonator,its no big deal easy enough to substitute pipe for it,the Flowmaster kit is cheaper but might have to bite the bullet and go with Gibson.
http://www.gibsonperformance.com/pro...;model=299#299
http://www.flowmastermufflers.com/pr...oducts_id=4047
http://www.gibsonperformance.com/pro...;model=299#299
http://www.flowmastermufflers.com/pr...oducts_id=4047
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Joined: Jan 2007
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RE: Interior Resonance with Cat Back Exhaust
I had the exact same problem with my Magnaflow catback as gatruck, sounded great outside and inside was good until you got to a certain RPM (1800-2000)or the truck was under load, the resonance in the cab was horrible. Returning it wasn’t really an option since shipping is so expensive to Canada.
Instead I removed the mid pipe and replace it with another Magnaflow muffler, this made the setup much quieter, but it still resonated badly at the same RPM range.
The Magnaflow catback is hanging in my basement, so if anybody is interested in purchasing let me know. I am tempted to grab a Flowmaster Delta 50 or any other chambered type muffler to compare.
The stock exhaust is bolted back up there, I threw a coat of high heat paint before bolting it back up.
The downfall of the factory exhaust (other than being really quiet) is that it is not made of stainless steel, so up here in Canada where we get snow and use salt on the roads it is not going to last long.
2005 Dodge Dakota - SLT Plus V8 QC
Instead I removed the mid pipe and replace it with another Magnaflow muffler, this made the setup much quieter, but it still resonated badly at the same RPM range.
The Magnaflow catback is hanging in my basement, so if anybody is interested in purchasing let me know. I am tempted to grab a Flowmaster Delta 50 or any other chambered type muffler to compare.
The stock exhaust is bolted back up there, I threw a coat of high heat paint before bolting it back up.
The downfall of the factory exhaust (other than being really quiet) is that it is not made of stainless steel, so up here in Canada where we get snow and use salt on the roads it is not going to last long.
2005 Dodge Dakota - SLT Plus V8 QC
Champion
Joined: Aug 2005
Posts: 3,313
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RE: Interior Resonance with Cat Back Exhaust
Seen those 'Pipe Organs' in an old church?
See how they have a different length pipe for each note
and how the long pipes make the low notes?
Seen a flute?
Notice how you hold your fingers over holes to make the end of the flute longer or shorter?
Same way with 'interior resonance' on a truck's exhaust system.
The distance from the end of the muffler to the tailpipe's end is critical, and you want to avoid anything in the 55 to 75 inch range, if you want to avoid resonance in the 1700-2300 rpm range.
Either make it shorter with a side exit style
or put a resonator in the middle to break up the length to something not in the 55 to 75 inch range.
Another way to get rid of the resonance
is to have a 'Helmholtz Resonator' chamber inside the muffler
but this is eactly the part that most 'performance' muffler designs
drop:
although a few still have one
Want to know more?
http://www.howstuffworks.com/muffler3.htm
http://www.tomorrowstechnician.com/tt/tt90616.htm
Good at math and want to know more?
http://www.gmi.edu/~drussell/GMI-Acoustics/Filters.html
See how they have a different length pipe for each note
and how the long pipes make the low notes?
Seen a flute?
Notice how you hold your fingers over holes to make the end of the flute longer or shorter?
Same way with 'interior resonance' on a truck's exhaust system.
The distance from the end of the muffler to the tailpipe's end is critical, and you want to avoid anything in the 55 to 75 inch range, if you want to avoid resonance in the 1700-2300 rpm range.
Either make it shorter with a side exit style
or put a resonator in the middle to break up the length to something not in the 55 to 75 inch range.
Another way to get rid of the resonance
is to have a 'Helmholtz Resonator' chamber inside the muffler
but this is eactly the part that most 'performance' muffler designs
drop:
although a few still have one
Want to know more?
http://www.howstuffworks.com/muffler3.htm
http://www.tomorrowstechnician.com/tt/tt90616.htm
Good at math and want to know more?
http://www.gmi.edu/~drussell/GMI-Acoustics/Filters.html
Captain
Joined: Nov 2005
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RE: Interior Resonance with Cat Back Exhaust
ORIGINAL: Frenchy
My ears hurt too much from good, loud, pounding, music!!!!
I can still hear it when I'm romping on it though. :-)
Yummy!
My ears hurt too much from good, loud, pounding, music!!!!
I can still hear it when I'm romping on it though. :-)
Yummy!
Joined: Jul 2005
Posts: 7
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RE: Interior Resonance with Cat Back Exhaust
ORIGINAL: ETXDak
The Gibson Sweptsideis what I'mleaning toward,on their site they claim it's thier most quite and best performing exhaust.I waswondering does it do away with the forward resonator?
The Gibson Sweptsideis what I'mleaning toward,on their site they claim it's thier most quite and best performing exhaust.I waswondering does it do away with the forward resonator?