Thread: hmmm

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  1. #1 hmmm 
    SE Level Member Dropped GP GT's Avatar
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    Well I finally did a muffler delete. Gotta admit i thought it would be louder then it is, which is good. My question is it sounds like its missing to me but my torque app has never showed any miss. Is it how these cars sound or am i missing a cylinder?
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  2. #2 Re: hmmm 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    A misfire when??

    They will randomly misfire at idle all the time, some notice it some don't. On a modded car you can sense it alot more.

    Otherwise while driving it they do sound like crap either way without mufflers.

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  3. #3 Re: hmmm 
    SE Level Member Dropped GP GT's Avatar
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    i think it sounds pretty good, but it just sounds like its missing when i am accelerating. maybe its just me because im use to the quietness it was before.
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  4. #4 Re: hmmm 
    Donating Users bandook's Avatar
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    Quote Originally Posted by Dropped GP GT View Post
    Well I finally did a muffler delete. Gotta admit i thought it would be louder then it is, which is good. My question is it sounds like its missing to me but my torque app has never showed any miss. Is it how these cars sound or am i missing a cylinder?
    Yeah, its missing TWO cylinders if you wanted it to sound good!
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  5. #5 Re: hmmm 
    SE Level Member Dropped GP GT's Avatar
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    it's a GXP, it has the V8
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  6. #6 Re: hmmm 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    I bet it sounds really goofy when it kick down into V4 mode on the freeway, maybe a little drone there.

    But because it's not like a truck V8 it won't sound the same. Just the way the exhaust runs makes it odd.

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  7. #7 Re: hmmm 
    Donating Users bandook's Avatar
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    Quote Originally Posted by Dropped GP GT View Post
    it's a GXP, it has the V8
    Oh. That makes my joke slightly less funny then.
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  8. #8 Re: hmmm 
    SE Level Member Dropped GP GT's Avatar
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    it seems to sound like that under light throttle
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  9. #9 Re: hmmm 
    The Blue One blueguy's Avatar
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    Post a video?

    I had a muffler and resonator delete with a 3" catted downpipe.

    It was loud. Not sure where the "misfire" stuff is coming from. This kinda talk is always a shot in the dark without something concrete like vids or seeing the car in person.
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  10. #10 Re: hmmm 
    GXP Level Member 91parkave's Avatar
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    What your probably hearing is dod which happens after 2nd gear. Also the rest of the exhaust is pretty restrictive as well. Get rid of that awful downpipe.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  11. #11 Re: hmmm 
    I live here. DirtDog's Avatar
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    yea i rode in a gxp with exhaust work and when 4cyc mode engages it does sound like poop (misfires) which it honestly kind of is lol
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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