What kind of muffler should I get?
#12
06-28-2013, 05:33 AM
FormerVendor
Mufflers -vs- Resonator
Mufflers -vs- Resonator
I have been building and installing mufflers for over 25 years:
To keep it simple and a bit easer to understand:
Muffler: to be a true muffler it needs to redirect or alter the exhaust flow.
Causing sound waves to react to the redirection. A true muffler will result in higher Back Pressure.
Resonator: (can be louvered or perforated and media packed or hollow) will not alter the exhaust flow very much at all (often called straight through) and will use absorption to reduce the sound level. A resonator will have a minimal effect on Back Pressure.
Above is a simplified definition of a Muffler and Resonator.
As far as I know every performance diesel kit uses a Resonator of some kind not a true Muffler.
Most of the stock "mufflers" (after the DPF) on post 2007.5 diesels are a Resonator.
So how do we find the sound that we are looking for?
This is the hard part, for 2 reasons:
1. Every engine is different and will have it's own personality.
2. Every persons ear is different, we do not hear things the same.
When I get someone in my shop and they tell me I want my truck to sound just like JOE BLOW'S truck, I tell them they need to buy JOE BLOW'S truck.
You can install the exact same system on 2 trucks and they will more often then NOT sound the same.
With a 4 Inch Exhaust--
I would start with a no "Muffler" system and save the stock Resonator.
Play with the location of the stock Resonator. I recommend just in front of the over the axel pipe. I like that sound, but again that is my ear and may not be what a person would be looking for.
Not sure how much this helps anybody--but I sure get the calls every day asking this same question over and over. All I can say is to get that exact sound you are looking for it takes time and a bunch of playing around to get it exactly as you would like. Or you can just buy JOE BLOW'S truck.
Anybody can feel free to call me with related questions. If the phone is busy, I am more then likely on the other line talking to the bank to get a loan to buy JOE'S truck.
Dave
870-580-0940
I have been building and installing mufflers for over 25 years:
To keep it simple and a bit easer to understand:
Muffler: to be a true muffler it needs to redirect or alter the exhaust flow.
Causing sound waves to react to the redirection. A true muffler will result in higher Back Pressure.
Resonator: (can be louvered or perforated and media packed or hollow) will not alter the exhaust flow very much at all (often called straight through) and will use absorption to reduce the sound level. A resonator will have a minimal effect on Back Pressure.
Above is a simplified definition of a Muffler and Resonator.
As far as I know every performance diesel kit uses a Resonator of some kind not a true Muffler.
Most of the stock "mufflers" (after the DPF) on post 2007.5 diesels are a Resonator.
So how do we find the sound that we are looking for?
This is the hard part, for 2 reasons:
1. Every engine is different and will have it's own personality.
2. Every persons ear is different, we do not hear things the same.
When I get someone in my shop and they tell me I want my truck to sound just like JOE BLOW'S truck, I tell them they need to buy JOE BLOW'S truck.
You can install the exact same system on 2 trucks and they will more often then NOT sound the same.
With a 4 Inch Exhaust--
I would start with a no "Muffler" system and save the stock Resonator.
Play with the location of the stock Resonator. I recommend just in front of the over the axel pipe. I like that sound, but again that is my ear and may not be what a person would be looking for.
Not sure how much this helps anybody--but I sure get the calls every day asking this same question over and over. All I can say is to get that exact sound you are looking for it takes time and a bunch of playing around to get it exactly as you would like. Or you can just buy JOE BLOW'S truck.
Anybody can feel free to call me with related questions. If the phone is busy, I am more then likely on the other line talking to the bank to get a loan to buy JOE'S truck.
Dave
870-580-0940
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