WTK: How to quiet a loud muffler

nareshseep · Postby **nareshseep** » December 10th, 2008, 9:48 am

Yeah guys, I want to quiet down a bit my muffler, someone told me to put a better silencer, but I was wondering if that will cause compression issues with the engine (too much backpressure)

vehicle mazda 323 1.5

VexXx Dogg · Postby **VexXx Dogg** » December 10th, 2008, 10:10 am

DO you have the original Catalytic convertor?
what about any resonators in the middle of the piping?

I am trying to understand what sort of exhaust system you currently have.
Is it the OEM exhaust with simply an aftermarket barrel?

X_Factor · Postby **X_Factor** » December 10th, 2008, 1:18 pm

if its the stock exhaust system with just a barrel at the end...put the silencer thing back into the center of the barrel..if ur barrel doesnt hav one..u may need to change the entire barrel

nareshseep · Postby **nareshseep** » December 10th, 2008, 3:22 pm

VexXx Dogg wrote:DO you have the original Catalytic convertor?
what about any resonators in the middle of the piping?

I am trying to understand what sort of exhaust system you currently have.
Is it the OEM exhaust with simply an aftermarket barrel?

yes that is basically the system I got presently.

VexXx Dogg · Postby **VexXx Dogg** » December 10th, 2008, 4:03 pm

well then the exhaust barrel is the culprit
If it does not have a silencer add-on, you may need to change the barrel.

I had a similar problem with my previous car.
Bought a generic stainless steel barrel. Was relatively quiet at first then got louder as time passed. Strongly suspected the cheap resonator filling was the culprit.

Anyhow, i swapped it for a good brand barrel, with better quality materials and workmanship, this one has a more consistent tone, and lasted until i sold the car.

VexXx Dogg · Postby **VexXx Dogg** » December 10th, 2008, 4:06 pm

wait nah
As in Naresh from...?

snouter · Postby **snouter** » December 10th, 2008, 4:08 pm

nareshseep · Postby **nareshseep** » December 10th, 2008, 4:11 pm

VexXx Dogg thanks for the info, did not know that mufflers does go bad sometimes.

sham1984 · Postby **sham1984** » December 10th, 2008, 8:43 pm

the muffler people could install a free flow resonator for about $250 i think...it will help lower the exhaust noise if you current barrel in good condition and you don't want to pay a grand to get a new stainless barrel

fearsaga15 · Postby **fearsaga15** » December 10th, 2008, 10:39 pm

the size of the resonator makes a difference 2. Adding the resonator will make a difference but VexXx Dogg is rite, u shud invest in a better quality barrel.

cheap barrels=poor materials of construction, poor quality.
I had a similar problem but the car was sold b4 i cud fix it. I have a megan racing barrel if u interested, pm me for details.

THE SYNDICATE · Postby **THE SYNDICATE** » December 12th, 2008, 6:22 am

resonators in the middle of the piping?

this will help

FullStop · Postby **FullStop** » December 12th, 2008, 10:07 pm

most cheap barrels will go bad quickly, the packing and the mesh around the packing does come loose, i bought a used HKS Super Drager and it is absolutely worth the 500 i paid for it, or was it 450, anyway, the sound is not loud and it take a fair amount of licks and has not yet dented, so maybe a good barrel will do it,,,,sorry this thread had to posted out of the hallowed walls of the mazda forum, i've been real busy, u could probly check dragon imports for a good used big-brand barrel.

Postby **Hook** » December 13th, 2008, 11:30 am

sham1984 wrote:the muffler people could install a free flow resonator for about $250 i think...it will help lower the exhaust noise if you current barrel in good condition and you don't want to pay a grand to get a new stainless barrel

how long exactly is this resonator? I'm looking for an 18" resonator with 2" inlet and outlet