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Old 09-21-2012, 07:25 AM   #1
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Question Stock Resonator, necessary?

I put on the Banks Monster Exhaust kit last night and have found it to be very quiet. My question is, how much louder would it be if I had an exhaust shop weld in some straight pipe in place of the factory resonator? Has anyone taken out the resonator yet and why did Jeep put it in there in the first place?

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Old 09-21-2012, 08:27 AM   #2
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I'm thinking of going with this exhaust, how do you like the sound? Sorry I can't help you with your question

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Old 09-21-2012, 09:06 AM   #3
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Quote:
Originally Posted by jeepingchester View Post
I'm thinking of going with this exhaust, how do you like the sound? Sorry I can't help you with your question
The sound is great, it's deeper just not hardly any louder. It was a simple install, very straight forward. The muffler is so much smaller... I will post some pics when I get home. It will be much harder to crush the Banks muffler on the rocks. There is zero drone and in fact, on the highway I forget it's there until about 4K RPM and even then the Banks CAI is still louder. The intake made a huge difference, there are others who disagree here but I picked up 2.3 mpg and by seat of the pants about 15hp at the wheels.
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Old 09-21-2012, 09:38 AM   #4
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Thanks for the input. That sound is exactly what I'm looking for, deeper but not louder. I'm on your side with the cai, not so much for power gains but a "meaner" sound. I'll be going with the Airaid though cause you can run it "open" but can be sealed like the stocked when water comes into play. Thanks, putting my order in.
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Old 09-21-2012, 09:44 AM   #5
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This guy has a few videos that give you a real good idea of what the sound is like without the resonator.

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Old 09-21-2012, 10:14 AM   #6
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Why not take the Resonator out and run it for a week or so. My buddy installed the flomaster Series 80 without the resonator, sounded great but on the hiway it was very loud on the interior. Following advice we read on hear we put a shorter (10" I believe) Resonator in, which has softened the output note but greatly reduced the drone felt inside the jeep.
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Old 09-21-2012, 12:37 PM   #7
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Quote:
Originally Posted by ontheedge
Why not take the Resonator out and run it for a week or so. My buddy installed the flomaster Series 80 without the resonator, sounded great but on the hiway it was very loud on the interior. Following advice we read on hear we put a shorter (10" I believe) Resonator in, which has softened the output note but greatly reduced the drone felt inside the jeep.
So youre saying that the resonator is a drone killer?
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Old 09-21-2012, 12:39 PM   #8
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What the heck does a resonator do anyway...?
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Old 09-21-2012, 02:15 PM   #9
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What the heck does a resonator do anyway...?
That's my original question
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Old 09-21-2012, 02:36 PM   #10
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Im no expert, but speaking with the techs at flomaster who helped us along the way, they said the resonator eliminates some of the frequency or sound waves that would come out of the exhaust and reverberate back up into the passenger compartment (I guess that is also referred to as "drone") this is normal do to the way the jeep is designed

This thread has alot of good info on resonators, page 7 on
AFE Cat Back Exhaust, CAI, Ypipe dyno 2012 rubicon
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Old 09-21-2012, 02:42 PM   #11
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"Sounds like a sports car now". LOL
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Old 09-21-2012, 07:40 PM   #12
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Here's the pics I promised

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Old 09-21-2012, 07:47 PM   #13
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Hmmm......I saw a pic of the Dynomax VT system and it included a straight pipe in place of the resonator.
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Old 09-21-2012, 08:40 PM   #14
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Almost got the dyno max kit, I thought the banks kit straight piped over the resonator too... I'm happy with it never the less
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Old 09-21-2012, 10:38 PM   #15
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My guess is you have a 2 door... the resonator is there to help cancel out some of the exhaust notes that to the ear will sound raspy. Probably not as bad as say a civic with a bucket at the rear but it will still produce a buzz that most people wont like.

If you don't mind louder exhaust then I say go ahead and cut the Banks resonator out and have a short section of straight tube band clamped in just to see if you like the sound if its good then have it welded in for a permanent fix. If you hate the sound then un-clamp the pipe and have a short 12" or so straight through resonator welded in which will allow full flow like straight pipe but it will do something similar for the sound waves, it just wont make it as quiet.

There is something called pipe tuning which is a whole different game and its not really something a lot of people do because it tends to have a negative effect on the MPG ad sometimes even engine power, but some people just don't care and they just want a "certain" sound no matter what the cost. Pipe tuning is basically where you install a smaller diameter straight pipe somewhere near the center of the exhaust system - so if you have 2.5" tubing you drop down to say 1.75" for a 8" or maybe 10" section what that does is makes the exhaust flow slow down or bottleneck at the smaller diameter pipe making the exhaust more constricted and then when it gets through the smaller pipe it then has room to expand to once again fill the 2.5" pipe and the exhaust sound waves bounce around like crazy until it fills the larger pipe and exits at the rear, basically it changes the sound of the exhaust by changing the characteristics of the sound waves

I've never seen this done on a Jeep but it usually makes the exhaust really deep sounding and sometimes a V6 will sound like a mean cammed up V8... Not trying to sound ignorant but this might be too much info for you since it looks like you went with a bolt on exhaust kit for ease of install and unless you understand "exhaust" it and how to tune an engine accordingly it gets really confusing. If you have a 2012 look at the loop in the exhaust Y pipe that is there to make the Y pipe equal length from each side that's there for engine tuning so that one bank of cylinders does not flow faster then the other. Similar to equal length headers on a race car its all about exhaust flow and back pressure to make power.
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Old 02-05-2014, 08:46 PM   #16
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If I have a gibson metal mulisha exhaust and want to cut off the resonator how will that affect the sound? It is already pretty deep and throaty I just want it to be louder.
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Old 02-06-2014, 08:47 AM   #17
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you could replace it with a small, magnaflow resonator. You would still have the benefits of a resonator with increased airflow....

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