Hellcat exausts dampening valves

Discussion in 'SRT Hellcat General Discussions' started by El-Gato, Feb 25, 2016.

  1. El-Gato

    El-Gato Senior Hellcat Member

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    Question about butterfly valves on H/C exausts and how to overide them open at all times without throwing fault codes. I believe that some members had figured out that a fuse could be pulled and valves would stay open. Anyone know the correct way to make this happen? Like the sound when cold starting but notice the exaust quiets down after a minute or two. While on subject does anyone know if this affects performance? Or cause problems if disabled thanks for any info available
     
  2. carcass

    carcass SRT Hellcat Supporter Gold Supporting Member

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    I Hope someday that when this question gets asked, as it does on s weekly basis, that someone somewhere will know the solution
     
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  3. El-Gato

    El-Gato Senior Hellcat Member

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    Someone out there must know how to keep those little buggers open all the time. Hopefully they will share with us
     
  4. Booky

    Booky Gold Member

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    Someone should contact Z Automotive and see if they can incorporate this into their Tazer.

    Along with the plug and play line lock, an open exhaust valve option would increase their sales dramatically. JS

    http://www.zautotech.com/tazer.html

    [​IMG]
     
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  5. timmbo

    timmbo Hellcat Member

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    Guys, I just had to pop in and say that there has been a solution for this available for a few months now in the form of a valve simulator kit. The OEM active exhaust motors are simply removed from the stock exhaust valves and installed onto the simulators. The computer can't tell the difference between the simulator and the OEM exhaust valve. No codes are set and the ECM sees business as usual. The simulators are tucked up and away to the chassis and a small lock pin holds the OEM exhaust valve into the permanent open position. No more ECM dictating when and under what conditions the valves open and close. Why a hardware simulator when an electronic solution (mini interface module) on the installation end would be much easier? Well, it's not quite that simple. It gets quite techy in this scenario where feedback from the motors are talking to the ECM through the LIN bus. An electronic solution "may" happen, but when is the question and how great the demand? I could also see another option of controlling the valves if DiabloSport was able to access and control the parameter. Whether or not that's even possible in the Dodge programming code table is the question. Even so... you would need the Diablo tuner at around 500.00 plus a programmable Diablo ECM for 2015 models. That's crazy money.

    Photos below of the prototype and now the available kit.

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
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  6. Bandit

    Bandit Gold Member

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    Sounds good in theory...

    So how much is this proposed setup going to cost?
     
  7. timmbo

    timmbo Hellcat Member

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    There are quite a few of these simulator kits on the road from members over on Challengertalk. The kits are reasonable at 150.00.
     
  8. 1949chopper

    1949chopper NC STATE PRESIDENT Hellcat Car Club HCC Charter Member

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    Cut out 3 inches of your exhaust where the valves are. Replace with straight pipe and tack the valves to outside of pipe. Done. Open all the time though. No solution yet for controlling them.
     
  9. timmbo

    timmbo Hellcat Member

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    That is an option, but many people don't want to chop and hack up their OEM exhaust.
     
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  10. usmc341

    usmc341 Gold Member

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    Leave it in Track mode.
     
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  11. El-Gato

    El-Gato Senior Hellcat Member

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    Thanks for the idea gonna chk these out great info
     
  12. NX91Notch

    NX91Notch Gold Member

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    But there are times you might want track mode sound but not the track mode suspension.
     
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  13. Hasan

    Hasan Rookie

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    you can choose custom mode
     
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  14. NX91Notch

    NX91Notch Gold Member

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    Which mode actually moves the exhaust valve to open though?

    I have a 6 speed so I have 3 options 700 or 500 hp (always left in 700 mode), suspension (street, sport, track) and traction (street, sport, track)

    I can hear the change in pitch of the exhaust when I click suspension to track mode. I hear no change when I adjust the traction modes and no change when I put the car in sport suspension mode.

    Which mode actually has control over the exhaust valves? I seem to only hear a difference in track suspension.
     
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  15. Hasan

    Hasan Rookie

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    It's the transmission on the A8 , I'm not sure about the manual , maybe it's the horsepower option
     
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