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exhaust sound

Discussion in 'General Tech and Maintenance' started by flydex28, Jan 24, 2013.

  1. flydex28

    flydex28 Senior Member

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    So i needed a muffler really bad and decided to have it replaced. I decided I may as well upgrade the rest as well so I had the shop put in 2 1/4 inch pipe all the way up to the downpipe, new muffler and resonator, and removed the cat since it would have been too small anyway. I believe it was like 1 1/2 inch or so before. Anyhow since I did that, whenever i go thru 3000 rpm to 3500 rpm i get this wierd rattley sound. The shop suggested adding a smaller resonator in place of where the old cat was. Im thinking maybe i should just save up and get another cat in there. At the very least I'll get rid of the unburnt exhaust out the back... Any suggestions? Would a cat or another resonator fix this or is it just the pipe size? Oh btw its a B16sir2.
     
  2. dc4dude

    dc4dude Member

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    Add a decent resonator where the cat is... Also, what kind of muffler did you have installed? If its the generic muffler shop brand you might have a hard time getting rid of that sound...
     
  3. flydex28

    flydex28 Senior Member

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    oh im not even really sure what kind it is.. it was the same as my old one i think.. a turbo muffler oval shaped. So yeah probably the generic one. So just put a second resonator in there where the cat USED to be?
     
  4. dc4dude

    dc4dude Member

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    Exactly. In my 01 integra, back when my wife used to drive it, the oem resonator (after the cat) rusted out. So i replaced it with a straight pipe. (The rest of the exhaust was still stock, including the cat) and just by removing the resonator, it developed a slight tinny sound around the rpms that you mentioned... 3-3500... So i can imagine what it would be like with a generic turbo muffler and larger piping...
     
  5. FLounder

    FLounder power hungry VIP

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    i also agree... add a resonator, it will help.
     
  6. flydex28

    flydex28 Senior Member

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    When I first put this engine in i didnt have a cat for it so i just had a straight pipe to the muffler and i can tell you it sounded pretty terrible..lol. So i had them add a cat thinking it would fix the problem.. so the setup was just like yours.. nope still sounded bad. I remember the shop telling me thats just the way hondas sounded and I was like noooo i dont think so, they added a resonator and the problem was solved. So hopefully just adding a second resonator will do it this time.. not sure how much they will charge for a new catalytic converter. Probably not cheap. I'll just have to get a quote. I'm guessing the second resonator will act like a cat in this case (im hoping) to help cancel the sound.
     
  7. dc4dude

    dc4dude Member

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    Id try the resonator first as it will be waay cheaper than even an aftermarket cat.. And see how that sounds.
     
  8. flydex28

    flydex28 Senior Member

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    Ok i'll try it out maybe next payday. Thanks.
     
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