1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

No cat

Discussion in 'General Tech and Maintenance' started by 2fastaccord, Sep 29, 2003.

  1. 2fastaccord

    2fastaccord Senior Member

    Messages:
    538
    Likes Received:
    0
    Joined:
    Dec 30, 2002
    Will not having a cat create a lot of road noise from beneath the car toward the rear?
     
  2. 2fastaccord

    2fastaccord Senior Member

    Messages:
    538
    Likes Received:
    0
    Joined:
    Dec 30, 2002
    I remember reading a thread recently and one of you guys said that the only noise in your car came from having no cat. It was that thread about sound dampening like dynomax and stuff like that. Any help would be greatly appreciated. I am tired of hearing all this road noise in the hatch of my rex.

    Peace*
     
  3. JDMilan

    JDMilan Senior Member

    Messages:
    6,730
    Likes Received:
    0
    Joined:
    May 11, 2003
    Location:
    Boca Raton, FL
    I had a testpipe and it make no noise at all with the cat off.
     
  4. SLA

    SLA Senior Member

    Messages:
    342
    Likes Received:
    0
    Joined:
    Aug 31, 2003
    Location:
    Rochester, NY
    Having no cat will raise the nosie level because one of the functions of a cat is to lower the noise!
     
  5. dohcvtec_accord

    dohcvtec_accord WRX Sellout

    Messages:
    8,433
    Likes Received:
    1
    Joined:
    Sep 29, 2002
    Location:
    The left lane
    Exactly. The cat acts as sort of a muffler within the exhaust system.
     
  6. wildbillhatchbac

    wildbillhatchbac the OG VIP

    Messages:
    832
    Likes Received:
    4
    Joined:
    Sep 28, 2002
    Location:
    CT
    its hard to beleive that the noise you are hearing is from not having a cat.

    how about tire noise? bad wheel bearing maybe.

    did you do anything to your car before you noticed the noise?
     
  7. kyleirwin

    kyleirwin Retired OG

    Messages:
    2,420
    Likes Received:
    2
    Joined:
    Oct 24, 2002
    Location:
    Vegas
    i think it's one of those damn exhaust bearings causing all that racket.
     
  8. Dman1100

    Dman1100 Senior Member

    Messages:
    374
    Likes Received:
    0
    Joined:
    Jan 13, 2003
    Location:
    Des Moines IA
    on the topic of exhaust, dumb question. Whats that canister between the cat and muffler right behind the shifter?
     
  9. tab

    tab Super Moderator

    Messages:
    3,839
    Likes Received:
    46
    Joined:
    Jan 10, 2003
    Location:
    Aberdeen, Washington State
    :lmao:
     
  10. h22a_in_a_si

    h22a_in_a_si Junior Member

    Messages:
    26
    Likes Received:
    0
    Joined:
    Sep 16, 2003
    You guyz are all trippin. I took my cat off a week or 2 ago, and it sounds the exact same. I heard it only farts if you have a straigt pipe, or a straight through muffler. Pop that shit off!
     
  11. Gen2Teg

    Gen2Teg Senior Member

    Messages:
    554
    Likes Received:
    0
    Joined:
    Jan 2, 2003
    Location:
    san francisco
    It makes a sound, but barely any. It sounds almost like a short ram intake. It helps a lot with high end power. The noise you hear is 99% something else, check with what everyone else here said, sounds right.
     
  12. dok

    dok Senior Member

    Messages:
    728
    Likes Received:
    1
    Joined:
    Mar 20, 2003

    I second I took my cat of the noise went all over the place but more tor as well you give little to get alot
     
  13. hcivic.com

    hcivic.com Senior Member

    Messages:
    4,571
    Likes Received:
    2
    Joined:
    Jan 7, 2003
    Location:
    Calgary Alberta canada

    its the resonator
     
  14. seanjuan

    seanjuan Senior Member

    Messages:
    918
    Likes Received:
    0
    Joined:
    Jun 12, 2003
    Location:
    Twin Cities, MN
    IMO the cat doesn't lower the sound very much and most of the time when people take the cat off it's because they are redoing the whole exhaust and then they blame the added volume to having no cat and not to the new catback system they just put in. The resonator is also supposed to quiet the system and I recently cut mine out and replaced it with flex pipe (it pretty much rusted off one day) and I couldn't tell a difference in volume (still very quiet and nearly stock sounding)

    You could try puting you cat back in and seeing if that gets rid of the sound, otherwise maybe try some sort of sound proofing stuff
     
  15. JDMilan

    JDMilan Senior Member

    Messages:
    6,730
    Likes Received:
    0
    Joined:
    May 11, 2003
    Location:
    Boca Raton, FL
    the cat doesn't act as a noise resonator,,that is what the resonator in the exhaust system if for, the cat is an emissions issue to protec the environment.

    I had a ITR 4-1 with a 2.5 collector, test pipe and Apex WS and it was quiet, very low key.
     
  16. dragoon118

    dragoon118 Member

    Messages:
    59
    Likes Received:
    0
    Joined:
    Apr 29, 2003
    Location:
    California
    i have dc 4-1 headers 2.5 collector and a punched out cat connect to a rs*r exhaust and its very quiet. i didn't notice any difference between the stock cat and the punched out one. both sounded the same to me.
     
Verification:
Draft saved Draft deleted

Share This Page