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Loud valves

Discussion in 'Turbo Cobras' started by termcobra281, Mar 9, 2019.

  1. termcobra281

    termcobra281 Active Member Established Member

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    Hi all... thinking running a loud valve set up on my exhaust with my single turbo. Has anyone done this? If so how do you like it?
     
  2. badcobra

    badcobra It's Fast Established Member

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    I have Loudvalves on my twin turbo car, they work awesome. With no other changes, I picked up 3lbs boost just adding the loudvalves.
     
  3. termcobra281

    termcobra281 Active Member Established Member

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    That's cool... how do you like the sound
     
  4. badcobra

    badcobra It's Fast Established Member

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    It only sounds different at WOT. Much louder, but fine
     
  5. termcobra281

    termcobra281 Active Member Established Member

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    I cant wait to hear it
     
  6. badcobra

    badcobra It's Fast Established Member

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    You are running a muffler out the back already?
     
  7. 98 svt

    98 svt Premium Member Premium Member Established Member

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    Any vid of you opening the valves?
    I'm interested as well.
     
  8. badcobra

    badcobra It's Fast Established Member

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    They open via boost. No electric motor to take a shit.
     
  9. termcobra281

    termcobra281 Active Member Established Member

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    Yes badcobra I have muffler on it
     
  10. tt335ci03cobra

    tt335ci03cobra Well-Known Member Established Member

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    Can you breakdown the physical theory on how that happens and the benefit of it?

    I’m of the persuasion that oxygen count is the desired benefit of any breathing mod. Additionally I understand “boost” or rather pressure build up as a measurement of restriction, and inherently a force to be appropriately facilitated.

    Every head, cam, breathing, and exhaust mod that I have done on my turbo car has dropped “boost” readings and added whp/wtq in varying ways (obviously cams shift to higher rpm etc)

    Example: when I dump my exhaust at the manifold (manual flaps) I drop 1 or so psi on my 10psi tune and pick up 25-50whp.

    I’m honestly asking, not trying to stir shit or internet bash. I learn everyday so this is something that caught my eye as I haven’t seen this before. Thanks.
     
  11. badcobra

    badcobra It's Fast Established Member

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    Unfortunately I cannot break down the physical theory, all I can tell you is with no other changes and the boost controller on the same duty cycle, it picked up 3lbs. I'm very confident this translated to an increase in power as I could see the fuel consumption numbers on my datalogs showed a sizable increase. My initial thought on this gain that the mufflers running to dumps before the axle was a significant restriction, especially with how hard I run the car.
     
  12. 98 svt

    98 svt Premium Member Premium Member Established Member

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    Any tuning required after installing the valve(s)?
     
  13. biminiLX

    biminiLX never stock Established Member

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    The change in intake boost is all dependent on how much restriction and backpressure your system has.
    Basically if the compressor side is fighting excessive back pressure and you eliminate a large percentage of that restriction, you can build more total flow in the system, potentially seen as more boost if the compressor side is now flowing more air.
    Any link to the ones you’re using?
    -J
     
  14. 98 svt

    98 svt Premium Member Premium Member Established Member

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    biminiLX likes this.
  15. 98 svt

    98 svt Premium Member Premium Member Established Member

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    @badcobra
     
  16. badcobra

    badcobra It's Fast Established Member

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    No tuning required for exhaust stuff.
     
    biminiLX and 98 svt like this.

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