Removing centre muffler

Discussion in 'Technical' started by brisz, Sep 2, 2017.

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  1. brisz

    brisz Well-Known Member

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    What will be the effect of removing the centre muffler from a TT JDM 2.5" cat back ?

    I would think at idle it wouldn't be much different, maybe a bit louder through the rev range.

    Any droning issues ?

    Has anyone done this ?
     
    brisz, Sep 2, 2017
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  2. TWIN TERROR

    TWIN TERROR Well-Known Member

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    On a TT more than likely smoke out the exhaust on idle unless you weld in a H pipe to balance the exhausts.
     
    TWIN TERROR, Sep 2, 2017
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  3. brisz

    brisz Well-Known Member

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    No only remove middle muffler not H pipe.

    [​IMG]
     
    Last edited: Sep 2, 2017
    brisz, Sep 2, 2017
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  4. Gunwarm

    Gunwarm Kamikazee Special Corps

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    How do you come up with smoke out the pipe ??If the rings are shot or valve guide seals are shot.Dont need cross pipe I have 3 inch all the way sound mean and that's from a street full of admirers . 100_5291.JPG
     
    Gunwarm, Sep 2, 2017
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  5. rob260

    rob260 Administrator Staff Member

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    Turbo seals & harmonics
     
    rob260, Sep 2, 2017
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  6. Mitch

    Mitch Has one gear: GO

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    What he said.
    Oftentimes, under periods of high gas velocity, the sperving bearings on the turbo lunar wayneshaft can side-fumble, causing cardinal grammeters to incite the flow of oil past the hydrocoptic marzlevanes. Fitment of a nonreversible tremie pipe to the differential girdlespring can ensure that sidefumbling is effectively eliminated.

    HTH
     
    Mitch, Sep 3, 2017
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  7. CHILI

    CHILI Indestructable Target

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    SOMEBODY is spiking your Bird Seed, AGAIN!!!!LOL
     
    CHILI, Sep 3, 2017
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  8. CHILI

    CHILI Indestructable Target

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    How about telling us something we don't already know?????!!!(some peoples Kids!!!).
     
    CHILI, Sep 3, 2017
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  9. Mitch

    Mitch Has one gear: GO

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    I suppose you haven't heard of the turbo encabulator then.
     
    Mitch, Sep 3, 2017
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  10. stumagoo

    stumagoo Active Member

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    sits right beside the gravimetric exciter
     
    stumagoo, Sep 3, 2017
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  11. Mitch

    Mitch Has one gear: GO

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    ^^ I like the boy.
     
    Mitch, Sep 3, 2017
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  12. brisz

    brisz Well-Known Member

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    Ok we have deducted that Mitch has a dictionary and likes boys. It's ok Mitch I love you but not in a ugame kind of way.

    But does anyone have any knowledge on the OP topic.
     
    brisz, Sep 3, 2017
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  13. Shane001

    Shane001 Well-Known Member

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    FWIW I'm running separate test pipes, to resonators, to rear muffler. No H or X pipe.

    Don't notice any issues including droning. But then again I rarely cruise ;)
     
    Shane001, Sep 3, 2017
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  14. Mitch

    Mitch Has one gear: GO

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    Since we're playing silly games to win silly prizes, I don't know how to answer any simpler than this:
    Mufflers muffle. If you are worried about noise, droning, or don't care for flow restrictions then put more mufflers in. If you are not, disregard.

    FYI, converting from high flow back to stock cat converters dropped approx 4dB from the exhaust at 2500rpm (for me). I'd expect similar from a centre muffler.
    You could work out optimal spacing of the crossover point working off cylinder pressures, firing order etc... but by the sounds of it you are not wanting to get that involved?

    TL;DR exhaust is black magic. It's one of those try it and see propositions if you are chasing that magical note.
     
    Mitch, Sep 3, 2017
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  15. ryzan

    ryzan Moderator Staff Member

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    It'll be fine, don't worry about it. I had a TT with no mufflers just cats one time and it was fine for long distance driving.
     
    ryzan, Sep 3, 2017
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  16. Gunwarm

    Gunwarm Kamikazee Special Corps

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    That's got not a thing to do with how your exhaust is set up,or is my Z the only one that works right ;)
     
    Gunwarm, Sep 3, 2017
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  17. rob260

    rob260 Administrator Staff Member

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    Isn't it? Well if you say so...
     
    rob260, Sep 3, 2017
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  18. CHILI

    CHILI Indestructable Target

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    As hard as it may be, for you to accept the highly unlikely possibility that you may be mistaken, YOU ARE WRONG!!!
    My money is on Rob!!!!
     
    CHILI, Sep 6, 2017
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  19. Gunwarm

    Gunwarm Kamikazee Special Corps

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    Robs Hero looking for brownie point ;)
     
    Gunwarm, Sep 6, 2017
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  20. ryzan

    ryzan Moderator Staff Member

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    Nah he's just right. You need a crossover/balance pipe in the exhaust. Yours probably has one too you just come across as the kind of bloke who wouldn't know it if it hit you in the head while you were working under the car.
     
    ryzan, Sep 6, 2017
    #20
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