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Exhaust open flaps diy from under the hood easy version

Discussion in 'California/Portofino/Roma' started by empiremotors, Mar 5, 2018.

  1. empiremotors

    empiremotors Rookie
    BANNED

    Oct 30, 2017
    1
    I recently bought my California love everything about it ! I did however wanted a bit more sound from the exhaust, I managed to find the vacuum line leading to the rear of the car ,(not sure if this has been posted before) and would like to share it for those looking to open up the exhaust flaps in 5 minutes. It’s located under the hood on the passenger side fender look for the line with the red tape, simply unplug the line and cap it.
     

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  3. THonda

    THonda Formula Junior

    Jul 7, 2004
    720
    Long Island, NY
    Full Name:
    TH
    That's amazing! Wish i knew before getting on my back, removing the under-tray and plugging 2 vacuum lines!
     
  4. good2go

    good2go Formula Junior
    Silver Subscribed

    Feb 9, 2016
    939
    What exactly does this do? keep it open at low RPMs? Isn't it open as soon as RPMs hit 3k?
     
  5. cab2u

    cab2u Karting

    Nov 19, 2003
    83
    NYC
    This seems a little too easy. Is this definitely the same vacuum line that you would plug if it was done in the back of the car?
     
  6. wrs

    wrs F1 Veteran
    Rossa Subscribed Owner

    Jul 11, 2015
    7,043
    Austin, Texas
    Full Name:
    William
    Why is the OP banned?
     
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  8. Vtechnologies

    Vtechnologies Rookie

    Mar 6, 2018
    1
  9. cab2u

    cab2u Karting

    Nov 19, 2003
    83
    NYC
    I tried it but I really couldn't tell if it worked or not. I expected to hear an immediate and substantial difference. I not so sure about this.
     
  10. wrs

    wrs F1 Veteran
    Rossa Subscribed Owner

    Jul 11, 2015
    7,043
    Austin, Texas
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    William
    They are open on cold start and close up after the car warms up.
     
  11. BUD STONER

    BUD STONER Karting

    Apr 10, 2018
    50
    Full Name:
    BUD STONER
    THANKS! WORKED GREAT FOR ME.............BUD IN SC
     
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  13. ljj33

    ljj33 Rookie

    Aug 28, 2013
    23
    Does anyone know if this line only runs to the rear where it splits to the two exhaust valves?Wondering if it services anything else since it would be a lot more convenient to plug the line up at the engine. Thanks.


    Sent from my iPhone using Tapatalk
     
  14. cab2u

    cab2u Karting

    Nov 19, 2003
    83
    NYC
    I tried this again and I do not hear the exhaust valve opening when I plug the hose.
     
  15. azlin75

    azlin75 Formula Junior

    Jul 16, 2017
    784
    Kansas
    Full Name:
    Shawn Hicks
    I think the valve is open until you start the car, then engine vacuum closes the valve, unless you are unhooking the vacuum line while the car is running in which case I’d suspect a stuck exaust valve because you should hear a significant difference in exaust note.
     
  16. EPIK22

    EPIK22 Rookie

    Sep 3, 2018
    17
    Full Name:
    David Earnest
    Bud, I just bought a '10 Cali and came across this DIY. Sounds too easy to actually work haha.

    So you tried it and it worked for you? I just unplug the vacuum line? does it always have the red tape? Is it possible to unplug the wrong end??

    Thanks!!
     
  17. ljj33

    ljj33 Rookie

    Aug 28, 2013
    23
    I did this recently and it works. Previously, I had plugged the lines under the rear of the car and this has the same effect but with a lot less work. Never got an answer about whether plugging the line at the engine affects anything else downstream but haven’t noticed anything different besides the exhaust tone. Mine had a little piece of red tape on it like the picture. You just disconnect it from the metal insert and plug with a little screw. You don’t have to do anything with the metal insert. Hope you enjoy the new sound!


    Sent from my iPhone using Tapatalk
     
  18. KarlA69

    KarlA69 Formula Junior

    Oct 9, 2017
    681
    UK
    Full Name:
    Karl
    Do you think something similar will work for the Portofino?
     
  19. EPIK22

    EPIK22 Rookie

    Sep 3, 2018
    17
    Full Name:
    David Earnest
    Great, thanks for the reply! I've been traveling and doing this quick mod this weekend.
     
  20. EPIK22

    EPIK22 Rookie

    Sep 3, 2018
    17
    Full Name:
    David Earnest
    It worked for me! Check the other thread out that I posted. Thanks for help and advice!
     
  21. Jawad

    Jawad Rookie

    Aug 9, 2018
    1
    Full Name:
    Jawad
    I tried this tip and I can confirm that it is working.
    Now everytime I pass by cars in our building's parking their alarms go off without even accelerating.
     
  22. EPIK22

    EPIK22 Rookie

    Sep 3, 2018
    17
    Full Name:
    David Earnest
    Haha! Awesome. I have kept the line plugged and love the extra growl.
     
  23. Fireman1291

    Fireman1291 Formula Junior

    Oct 30, 2017
    619
    Tampa, FL
    Full Name:
    Adam
    Yes. Thanks!
     
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  24. L3nderSson

    L3nderSson Rookie

    Jun 10, 2019
    5
    Hey guys, someone online here who did that ??
     
  25. L3nderSson

    L3nderSson Rookie

    Jun 10, 2019
    5
    Do you did that? Before you start the car in Cold? Is it really open the flaps permantly??
     
  26. Il Co-Pilota

    Il Co-Pilota F1 Rookie

    May 29, 2019
    4,610
    Hopefully some place nice.
    Full Name:
    A.B
    Really? Do you like in 1997? Who uses car alarms these days?
     
  27. Redneck Slim

    Redneck Slim Formula 3
    Silver Subscribed

    Mar 10, 2011
    1,040
    Palo Alto,CA,USA
    Full Name:
    Walt Kimball
    Anybody know?
     
  28. Redneck Slim

    Redneck Slim Formula 3
    Silver Subscribed

    Mar 10, 2011
    1,040
    Palo Alto,CA,USA
    Full Name:
    Walt Kimball
    On the USA Portofino,you can unplug the electrical connectors from the mufflers. This produces a nice and consistent sound without the blatting,but it turns on the check-engine light.
     
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