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SLP Loudmouth 2 back fire?

This is a discussion on SLP Loudmouth 2 back fire? within the Camaro / SS forums, part of the Vehicle Specific category; hey guys, so i have 2001 camaro SS it only has a lid and an SLP cat back (loudmouth 2) ...

  1. #1
    Member Maro SS's Avatar
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    SLP Loudmouth 2 back fire?

    hey guys,

    so i have 2001 camaro SS it only has a lid and an SLP cat back (loudmouth 2) and when im not in gear(m6) if i rev over about 4000 rpm she will make a crackle noise when im leting off the gas. sounds to me like a back fire but im new to LS1 .. does anybody else have this problem with LM2? is this even a problem?

    thanks in advance you guys are always great help!
    Last edited by Maro SS; 05-24-2009 at 12:55 PM.
    2001 Camaro SS M6 SLP LMII, Lid
    1987 iroc-z RIP 5.7 TPI Full exhaust, lingenfelter intake runners (gone but not forgotten)
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  2. #2
    Senior Member Danger731's Avatar
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    I love that sound !
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    Member cdz28's Avatar
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    Quote Originally Posted by Danger731 View Post
    I love that sound !
    x2

    Its not a problem

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    Royal pain in the.... Phantom2kz's Avatar
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    2001 Z-28 A4 NBM
    2002 35th anni SS M6#1696

    used to get that sound with the flowmonster when cold,,,man i miss that..

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    Member Maro SS's Avatar
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    Haha I thought it was pretty bad ass then someone made a comment and I got worried.

    Thanks guys

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    Your dealership guy konigandy6's Avatar
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    Yup, completely normal... wait till you put headers on!!!

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    Member Sayed_000's Avatar
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    sick sound man !! enjoy life

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    Member 2K2SLPSS's Avatar
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    Quote Originally Posted by konigandy6 View Post
    Yup, completely normal... wait till you put headers on!!!
    i have the cme and when the motor is cold i can usually get one good clank/pop of a backfire. then when its warm i can usually hear soft low pops if i shift it right. im waiting on my longtubes and ory. i cant wait to hear the bfires then.

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    Member Maro SS's Avatar
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    can anyone explain to me what exactly causes that to happen?

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    Moderator 35th-ANV-SS's Avatar
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    I have the LM-II on my car also. It has done the same thing. No worries. In the process of getting 1-7/8" Kooks LT so we'll see what that sounds like when I get her back.

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    I love that sound. The lm2 is to quiet for my tastes especially on a stock car. I had lm2, lm1, and now sweet thunder chambered muffler. When I put my longtubes on with ory and lm1 that thing was loud as fuck. scared old people.

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    Member 2K2SLPSS's Avatar
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    what muffler is on the cme? is it even a loudmouth or completely different??

  13. #13
    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by MNZ28 View Post
    I love that sound. The lm2 is to quiet for my tastes especially on a stock car. I had lm2, lm1, and now sweet thunder chambered muffler. When I put my longtubes on with ory and lm1 that thing was loud as fuck. scared old people.
    Nice....I am hoping it is A LOT louder.

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    Senior Member tatertot91's Avatar
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    Mine does that when cold. I love it

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    Member ghettosled's Avatar
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    i thought that happens because the cats are cold while the air pump is trying to heat them up quickly.

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    Honor-Courage-Commitment SajoR's Avatar
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    navy blue metallic
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    I have a full exhaust from headers back, with just a borla muffler and freaking LOVE that sound when i pick it up to about 4500rpm and just let off.....

    So you have no worries there, it's an enjoyable sound =)

    I do believe you get that kind of sound strictly from our cars since I've never really heard it on a mustang or charger before.....I thought it was the firing order that made it pop when let off, but I could very well be wrong....

    Anyone have any ideas?

  17. #17
    Impounded
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    I have a cutout and gutted cats and no emissions and mine sounds epicly loud

  18. #18
    Member FullBlack4thGen's Avatar
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    My flowmaster axleback does the same thing. Personally i like it but im waiting for a new engine before i put a headers back exhaust. I just hope with a new engine it will still do it.

  19. #19
    Member 00Z28DC's Avatar
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    Quote Originally Posted by SajoR View Post
    I have a full exhaust from headers back, with just a borla muffler and freaking LOVE that sound when i pick it up to about 4500rpm and just let off.....

    So you have no worries there, it's an enjoyable sound =)

    I do believe you get that kind of sound strictly from our cars since I've never really heard it on a mustang or charger before.....I thought it was the firing order that made it pop when let off, but I could very well be wrong....

    Anyone have any ideas?
    I have a lm2 in my A4 and it does the same thing when I hit 4500 and let the rpm's drop. But man I love that sound! I think you might be on to something with the firing order thing though, I've definately never heard anything like that from a stang or charger either.

  20. #20
    Member Blue Thunder 42's Avatar
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    Quote Originally Posted by Maro SS View Post
    can anyone explain to me what exactly causes that to happen?
    I believe it's unused gas exploding in the cats or muffler or lack there of. I love it also....

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