I bought my exhaust setup about 3 weeks ago.... and now the overall sound has gone from deep to Ricey....
Around 3K rpm it's gets a really hollow sound on the inside of the car.....but on the outside there was no real change....except when letting off the gas it's very bubbly.....not a pop noise....more of bubbling down kinda noise......any suggestions as to what it could be.....? a leak?
any help is appreciated

 

If the exhaust is brand new it will get alittle louder after it breaks in.. but a bubbling could be a leak around the front of the exhaust

 

the flange has a plug in it...i'll put it up on the racks and see if the whole in the flange for some "mysterious" o2 sensor came out....thanks dude.

 

hey man that happened to me. when i first got it it was so loud and deep. then after few weeks of driving it sounded like turds. couldnt figure out why. but then i did an oil change with a can of engine restore and it sounded just like it did teh first day i got it. my motor has 170k on it. cant really explain? restore restore compression making it sound better? who knows. still sounds great now after a month

 

might have to try that. I just got the B16a in...and the exhaust was really $$$.....complete custom setup....so now i might have to ask the dude what's going on....

 

Any muffler or exhaust system is gonna change after awhile, what kind of setup do you have ?

 

i put in engine restore and 5w-30 high milage **** vavoline. and yea my exhaust was almost 500 invidia cat back. mine tone changed after two weeks. but like i said after oil change and engine restore sounded like it did the first day and now 2 months later still sounds teh same.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90blackcrx &raquo;</TD></TR><TR><TD CLASS="quote">Any muffler or exhaust system is gonna change after awhile, what kind of setup do you have ? </TD></TR></TABLE>
---Front to Back----
stock b16a manifold(new gasket) no heatshield
2.5" dual port flange from some intergra(?)(he had one laying around that happend to fit perfectly to the block and to the bolts to hold it in.
It has an opening for an o2 sensor. i stick one in and clipped the end off to plug the hole.
High flow cat
The piping is 2"mendrel(spelling?) bent piping fitting the contours of the car....come up and over the rear passenger side arm and bends to an EF classic style bend to where the pipe meets a magnaflow triple chamber.
90o bend to come out to a 2.5 Stainless muffler tip sitting under the stock groove in the bumber.
and it has a resonator in the setup.
it sounds beautiful at idle......and for the first 3 weeks it sounded like a mustang ran into my virgin honda....at idel it was real low and only was noticeably loud when vtec engaged. And now in the car and outside it's loud as **** around 3k up until 4k....and when the gas pedal is let go it rumbles like a deep growl but Popping....if that makes sense.....i checked for leaks i didn't find any....just the nomrla condensation on the inside of the muffler, the welds are good and the cat if snug under the car...no rattling....just TOO LOUD and RICEY.....
any help

gonna try the new motor oil and engine restore.....might help...

 

I have a magnaflow muffler and its jut gonna get louder and louder. Basically the material inside the muffler or resonators start to deteriorate causing your exhaust to get louder.

 

****....anyway to stop that.....it actually sounds like **** is flying out the tailpipe..... did you do something about it?

 

I'm putting on a resonator but I'm not expecting the resonator to last for every either. But there only 20 dollars.

 

The raspy popping happend to my custom bend without a rezonator. I never did fix it... but the explanation i got at the tunner said that its just normal for a exhaust with no resonators that that is so open and flowing... i'm running 2.5 custom bend of the axel with a fart can... its REALLY loud and got louder as the packing in the fart can started breaking down.

 

BUmmer.....i might just take it back and have my guy take care of it....there's no way after such a short time the Muff...hehe i said muff...should just up and die on me...it's a ncie magnaflow...i heard really good things and for the work i paid for i could have gotten RS*R.....so....crap....i'll look into if i find anything that solves the prob i'll post it up.....but **** that sucks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Burlyirishdude &raquo;</TD></TR><TR><TD CLASS="quote">BUmmer.....i might just take it back and have my guy take care of it....there's no way after such a short time the Muff...hehe i said muff...should just up and die on me...it's a ncie magnaflow...i heard really good things and for the work i paid for i could have gotten RS*R.....so....crap....i'll look into if i find anything that solves the prob i'll post it up.....but **** that sucks. </TD></TR></TABLE>

Was this a used piece or brand new and what type of resonator is in there ?

 

I think you need a longer resonator. Maybe 16" or more.

Or you may have a leak somewhere. Check the welds where the hangers are.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90blackcrx &raquo;</TD></TR><TR><TD CLASS="quote">I have a magnaflow muffler and its jut gonna get louder and louder. Basically the material inside the muffler or resonators start to deteriorate causing your exhaust to get louder.</TD></TR></TABLE>

you're correct......that's the difference between fiberglass and stainless steel packing. Obviously stainless steel is going to hold up better.
Goes back to the old saying....you get what you pay for.

 

I am not 100% sure if there is a resontor in there. The flange was used...but in good condition. it was a dual flange with 2.5" opening. The exhaust isn't cheap the metal is strong and the cat is brand spanking new....the only thing is at around 3k-4k it sounds ricey...after and before that....it's relatively silent....I had a chance to run the car up the coast of Ca this week...and it performed like a dream the resonance in the car wasn't nearly as bad as i had thought. I'll take a look at those welds near the brackets....they look clean to me.....but never hurts to 2x check.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Burlyirishdude &raquo;</TD></TR><TR><TD CLASS="quote">I am not 100% sure if there is a resontor in there..</TD></TR></TABLE>

Pick up a resonator and put one in there, it will get rid of the raspy sound.

 

It happens over time. I have custom pipe with a resonator and an N1 style muffler from ebay. Over the 6 month period since it was done, it has gradually gotten louder and now has a hint of rice. I don't want to know what it would sound like without the res. Definitely look into getting one.