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Disconnecting vacuum hose to exhaust valve - what's the trick???

Discussion in '612/599' started by wolfturbo, Nov 28, 2015.

  1. wolfturbo

    wolfturbo Formula Junior

    Nov 7, 2005
    547
    So. Cal
    Full Name:
    Rob W.
    Hey guys,

    I want to disconnect my exhaust valves. I can look into the exhaust pipes and basically see where the hose connects to the inner pipe, and indeed I can stick my hand in there from underneath.

    But I am curious if there is a trick to doing this instead of just bloodying my knuckles? Not much room in there for big adult hands. I was hoping the botton matte part of the rear bumper might disconnect, but that certainly doesn't appear to be the case.

    I feel like I am basically trying to do a ship-in-a-bottle fiasco by simply using extended needle nose pliers from the back and one hand from underneath.

    I'm all ears if there's a better way! Thanks to all.

    Wolf
     
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  3. trygve11

    trygve11 Formula Junior
    BANNED

    Aug 20, 2008
    740
    Kansas City
    Full Name:
    Jason Hagen
    You need to plug the lines once removed. Otherwise you will have a vacuum leak back to the intake manifold whenever the valve it actuated.
     
  4. wolfturbo

    wolfturbo Formula Junior

    Nov 7, 2005
    547
    So. Cal
    Full Name:
    Rob W.
    Got it - know about the plugging part. Just trying to figure out easiest access for disconnecting!
     
  5. trygve11

    trygve11 Formula Junior
    BANNED

    Aug 20, 2008
    740
    Kansas City
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    Jason Hagen
    Do you have a 599 or 612? For 612, just pull at RHS rear of intake plenum and cap at the plenum. Shouldn't need to pull at exhaust then.
     
  6. wolfturbo

    wolfturbo Formula Junior

    Nov 7, 2005
    547
    So. Cal
    Full Name:
    Rob W.
    I have a 599. Assumed I would have to cap at exhaust. Never occurred to me that I could cap at rear of intake plenum. But I definitely need to do my research before I start capping anything under the hood!
     
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  8. Roupin

    Roupin Formula 3

    Oct 7, 2013
    2,167
    Encino
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    Roupin
    #6 Roupin, Nov 29, 2015
    Last edited by a moderator: Sep 7, 2017
  9. trygve11

    trygve11 Formula Junior
    BANNED

    Aug 20, 2008
    740
    Kansas City
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    Jason Hagen
    I have my sport exhaust arriving from Europe for my 612. I thought they failed closed?? I.E. if you disconnect the fitting, it stays in quiet mode. Do I have this backward?
     
  10. wolfturbo

    wolfturbo Formula Junior

    Nov 7, 2005
    547
    So. Cal
    Full Name:
    Rob W.
    I have that bottom pair of extended needlenose pliers Roupin. I will give it a go now.

    Thanks!
     
  11. C4YES

    C4YES Formula Junior

    Apr 7, 2008
    888
    Orange County, CA
    Full Name:
    Todd
    Roupin's a dentist BTW. So this makes sense.
     
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  13. wolfturbo

    wolfturbo Formula Junior

    Nov 7, 2005
    547
    So. Cal
    Full Name:
    Rob W.
    Great..... so he can do it one-handed in the dark and I am going to bloody every (#&*%$(@&$ knuckle!!!!
     
  14. Wheels1

    Wheels1 F1 Rookie
    Silver Subscribed

    Oct 23, 2007
    3,033
    UK
    Full Name:
    Grant
    I used a brake line clamp, fiddly to fit on but easy to undo if necessary, no need to pull the pipe off.
     
  15. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    33,717
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    575s were fail closed, 612s and 599s are fail open, like the late V8s.
     
  16. wolfturbo

    wolfturbo Formula Junior

    Nov 7, 2005
    547
    So. Cal
    Full Name:
    Rob W.
    All good now and worthwhile mod. And best of all, only one bloodied knuckle!!!
     
  17. trygve11

    trygve11 Formula Junior
    BANNED

    Aug 20, 2008
    740
    Kansas City
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    Jason Hagen
    Thanks Taz. This is helpful.

    Any thoughts on whether the ECU controlled actuation of the valves is "about right" or am I likely to want to wire in my own bypass/control? My car came provisioned with the electrical to control the pneumatics to a sport exhaust and I've not got all the plumbing and parts ready to go in the car. Just wondering it I should wire up my own "Open/Closed/ECU" switch while I am in there.

    Thanks.
     
  18. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    33,717
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    Steve Bisel sells a nice kit for converting to selectable open or controlled by the Motronic ECU. I have one that I have not gotten around to installing.
     
  19. Roupin

    Roupin Formula 3

    Oct 7, 2013
    2,167
    Encino
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    Roupin
    Only for females, but that's definitely not the tool of choice :p

    And with that theme...

    Ummm....HAHA!!!
     
  20. trygve11

    trygve11 Formula Junior
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    Aug 20, 2008
    740
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    Jason Hagen
    Yes, but the kit says it doesn't work on a 612.

    I think this is an easy project. I get a three way rocker switch, mount it in the center console, and run one simple wire down to the existing ground to either complete that ground manually (closing the valves, interrupt it (open valves manually) or send to ECU control. Should be a breeze, right?!
     
  21. trygve11

    trygve11 Formula Junior
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    Aug 20, 2008
    740
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    Jason Hagen
    #18 trygve11, Nov 30, 2015
    Last edited by a moderator: Sep 7, 2017
  22. Kyle Stoffer

    Kyle Stoffer Rookie

    Sep 23, 2019
    28
    Full Name:
    Kyle R Stoffer
    Just picked up a 2011 599, I can see the vacuum hose. Only question is what is the best way to plug it? Bolt and hose clamp? Or even more simple, kink and clamp? Figured I would ask a group that has done this successfully rather than trial and error. Thanks for the help!


    Sent from my iPhone using FerrariChat.com mobile app
     
  23. Kyle Stoffer

    Kyle Stoffer Rookie

    Sep 23, 2019
    28
    Full Name:
    Kyle R Stoffer
  24. Kyle Stoffer

    Kyle Stoffer Rookie

    Sep 23, 2019
    28
    Full Name:
    Kyle R Stoffer
    Update, once I got the vacuum hoses off it was very clear a simple screw was the best plug. I also added a hose clamp to ensure the screw never moved...took about 10 minutes. And yes, the sound is amazing. 1000x better than stock.


    Sent from my iPhone using FerrariChat.com mobile app
     
  25. gburkett

    gburkett Karting
    Silver Subscribed

    May 25, 2012
    75
    Austin, Texas
    Full Name:
    Glenn Burkett
    Is the intake manifold connector for the exhaust valve on the 612 obvious? I would like to try it but I don’t want to pull the wrong line. Any pictures or sage advice on which hose to disconnect?
     

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