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Thread: Signum dual exhaust

  1. #1
    Regular Member shillbag's Avatar
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    Default Signum dual exhaust

    maybe this is is a question for Duncan or Mark the cabby but i will throw it open too you all.
    would it be better to change from a dual exhaust system to a single one as i have read that the dual one, i have, is really just for show ? there seems to be an endless supply of single exhausts at what i would call a reasonable price, that would also give performance gains. i know i would have to change the rear valance to accomodate the single pipe as i have a 2.0T .any ideas on this subject ? does anyone know the price of a replacement exhaust for my car ?
    also is there a cover for a vx locking wheel nut as mine is showing signs of rust.
    any advice is gratefully received. thanks

  2. #2
    Regular Member Caterman's Avatar
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    Vehicle : Signum

    Trim : Elite

    Engine : 3.2 V6

    Year : 05

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    Where have you read that m8 Perfomance gains ????? More like performance losses. If you fit a Vx single system you will upset the back pressure by restricting the flow. I've gone from a single to twin system but still have the same amount of boxes keeping the balance correct.
    Last edited by Caterman; 16th August 2006 at 19:22.

  3. #3
    Regular Member shillbag's Avatar
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    maybe wrong end of the stick by me but if the second is only cosmetic then a a single exhaust is surely fisable, not that i want to change but wondered if it could be done

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    Regular Member Maverick's Avatar
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    The dual exit exhaust are fitted for a reason, you may even find that after market single exhaust would not be listed for a 2.0T for example which should have dual.

    But regarding causing performance loss, I would say this is an old wives tail. Since fitting a dual exit on mine, the actual exhaust temperature has dropped.

    You can monitor this on tech 2, although my original left hand box is still there, I have used the 2.2 direct right hand box and proper irmscher Y peice and the gas's are no longer struggling to get out the left hand box but have another route out.

    Made quite a difference on the temps, whether it has made a performance increase is questionable but more likely not.

  5. #5
    Regular Member shillbag's Avatar
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    ok nuff said
    glad to get advice from another leicester owner. thanks mat.
    any idea about the locking wheel nut cover

  6. #6
    Regular Member Ste's Avatar
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    Vehicle : Jaguar XF 3.0D V6

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    Speaking from a diesel point of view. Lower exhaust temps could be attributed to lower exhaust back pressure, hence 'getting the gasses out easier' which would mean less energy pushing the gases out and more power to the wheels. As higher exhaust system restriction cause increase in exhaust gas temps.
    So fitting dual exhausts could improve performance. I would think that to apply this logic to petrol would be reasonable.

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