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812 GTS exhaust / “pin open”

Discussion in 'FF/Lusso/F12/812S' started by BMan14, Dec 29, 2020.

  1. BMan14

    BMan14 Karting

    Dec 31, 2013
    143
    In certain previous Ferrari’s the exhaust vacuum system could be pinned open with a golf tee, etc to get the best sound at all times. Is that possible with the 812 GTS? My car is preparing to get on a boat so I’m starting to look at possible little tweaks like wheels and exhaust. I don’t want to overdo it and cheapen the car so I prefer using what’s already there if possible.
     
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  3. SAFE4NOW

    SAFE4NOW F1 Rookie
    Sponsor Owner

    Aug 25, 2004
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    Steve F
    There may be aftermarket programmers that work, the previous unplugging the bypass valves no longer works, as the vehicle computer now monitors the valve operation, and eventually turns the check engine light on.

    This goes for Portofino's, 488's, and newer models...

    It was an easy mod, that a lot of clients liked, and 85% of new cars had it done before delivery.

    S
     
  4. BMan14

    BMan14 Karting

    Dec 31, 2013
    143
    Thank you for the thorough and fast answer!
     
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  5. Wheels1

    Wheels1 F1 Rookie
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  6. BMan14

    BMan14 Karting

    Dec 31, 2013
    143
    Thanks !
     
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  8. junc

    junc Formula Junior
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    Aug 2, 2007
    420
    Chicago/Laguna Beach
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    Jun
    Someone on f chat I can’t remember his user name pinned his valves and it worked. He made a YouTube video of a drive with the valves pinned open .

    I have the capristo valve controller on my GTS. The remote stopped working for some reason so the car is in factory mode . There were no check engine lights using it when it did work. Im getting it fixed next week.

    Originally when I asked about pinning the valves the tech told me that it might throw a check engine light due to how the newer Ferraris control them so I went with the controller since Karl here on f chat said his worked . It seemed weird to me that the controller was fine but pinning might not be.


    Sent from my iPhone using FerrariChat
     
  9. Scudmsl

    Scudmsl Formula Junior
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    Aug 12, 2014
    519
    USA
    My 812 GTS valves have been pinned by my dealer. I will let you know when I pick it up in a week.
     
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  10. BMan14

    BMan14 Karting

    Dec 31, 2013
    143
    Great. I emailed the service department at my dealer to see what could be done as well.
     
  11. KarlA69

    KarlA69 Formula Junior

    Oct 9, 2017
    629
    UK
    Full Name:
    Karl
    Hi

    I've never pinned valves on my cars so I can't comment on that, but I did fit a Capristo valve controller paired with Novitec rear boxes to my 812 SF. I sold that car and moved the kit over to the 812 GTS. It fit perfectly and works fine. No CEL or other issues. Let me know if any questions on this set up.

    As an aside, I probably wouldn't bother fitting the Novitec rear boxes to the GTS (unless you already own them and don't need to buy). I didn't really notice the difference for the GTS. I'm not talking about the valve controller (or pinning valves), which is a good idea I think, I just meant the after market rear boxes on their own don't add much.
     
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  13. BMan14

    BMan14 Karting

    Dec 31, 2013
    143
    Just heard back from the service department and they said they have pinned several GTS exhausts open and it’s wonderful. They will be doing mine as well.
     
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  14. Avia11

    Avia11 Formula Junior
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    Jan 21, 2017
    716
    San Diego, CA
    does pinning the exhaust affect performance at all?
     
  15. BMan14

    BMan14 Karting

    Dec 31, 2013
    143
    No...in fact you are basically getting the exhaust to be "open" the way it is in race mode with a lot of throttle.
     
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  16. KarlA69

    KarlA69 Formula Junior

    Oct 9, 2017
    629
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    Full Name:
    Karl
    I think the whole concept of having to use valved exhausts is only to meet noise regulations (ie. quiet around town, louder permitted at high revs in countryside). From a performance standpoint, no valves (or always open) is best. For example, race cars don’t have valved exhausts.

    Can anyone more technical than me confirm my understanding?
     
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  17. Gh21631

    Gh21631 F1 Veteran
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    Feb 24, 2011
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    East
    I believe pinning the exhaust screws with back pressure and you may lose some power down low.
     
  18. j09333

    j09333 Formula Junior
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    May 7, 2004
    749
    It is me :)
    Pin it and it is wonderful. No CEL.
    If in the future, there is CEL just ubpin it and settle for while and pin again.
    Easy job once car is on lift.



    Sent from my iPhone using FerrariChat
     
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  19. KarlA69

    KarlA69 Formula Junior

    Oct 9, 2017
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    Karl
    I’ve heard this before but never really understood it. Why would creating a restriction / back pressure (via closed valves) at low revs cause an increase in power?

    If that were the case, would race cars not have valved exhausts...?

    thanks
     
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  20. j09333

    j09333 Formula Junior
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    May 7, 2004
    749
    Low down torque matters on the street. Race cars don’t care low down rpm.




    Sent from my iPhone using FerrariChat
     
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  21. nickorette

    nickorette Karting
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    Jun 19, 2017
    159
    Toronto
    I believe in various dyno tests for different vehicles, the valves pinned open actually increased HP. Not surprising as NA motors usually perform best when being able to breathe as free as possible.

    On another note, I would suggest getting a remote over pinning valves. Long trips on the highway can get tiring listening to droning, much more pleasant with valves closed.
     
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  22. BATM4N

    BATM4N Rookie

    Oct 12, 2013
    8
    Had valves on open from day 1. Done over 1000 miles no CEL
     
  23. Lagunae92

    Lagunae92 Formula Junior
    Silver Subscribed

    Feb 16, 2018
    689
    SoCal
    If you can pin them, great. I have the Capristo remote on my regular SF, and I'm not sure I'd spend the money again. Not much difference, but off throttle at low speeds is great with the gurgles. That being said, my remote stopped working after 5 months, and it turns out it was a bad battery. Dealer diagnosed and fixed it very fast. Strange, because it was only used once a week.

    Planning to do an X pipe and maybe Novitec back boxes. That should be nice.
     
  24. junc

    junc Formula Junior
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    Aug 2, 2007
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    Chicago/Laguna Beach
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    Jun
    Il have to check my remote battery . It stopped working after a week. Very strange.


    Sent from my iPhone using FerrariChat
     
  25. RamsHmb

    RamsHmb Formula Junior
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    Jan 22, 2017
    460
    California
    How much louder is it? I like the idea but I don’t want to make a lot of noise rolling through town. Can you modulate with light acceleration?
     
  26. Lagunae92

    Lagunae92 Formula Junior
    Silver Subscribed

    Feb 16, 2018
    689
    SoCal
    It’s basically the same with a little more on the lower end of the tach.
     
  27. KarlA69

    KarlA69 Formula Junior

    Oct 9, 2017
    629
    UK
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    Karl
    FYI my GTS with 200 cell sports cats. Videos don't do it justice, but it sounds epic in person
     

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  28. SecretSquirrari

    SecretSquirrari Karting

    Dec 3, 2020
    61
    Chicagoland
    Full Name:
    J
    My understanding of the theory is that the intake and exhaust valves have some overlap in their open periods, and the incoming air actually helps force exhaust gasses out. At lower revs, where both sets of valves are open at the same time for longer than they are at high revs, lack of back pressure can let too much "good air" escape before the exhaust valves close, which reduces power. At higher revs it's not an issue because the things are happening faster so there's less time for good air to escape. And since race cars spend most of their time at higher revs, the balance tips in favor of less restriction (less drag on the engine).
     
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