Bypass exhaust screamer valves

Discussion in 'SRT10 and SRT10 Coupe Discussions' started by tzortzViper, Dec 15, 2010.

  1. tzortzViper

    tzortzViper Viper Owner

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    I was thinking lately for experimenting a little around on the exhaust system of my Gen4 SRT.

    I got an idea on this vid on youtube
    YouTube - Dodge Viper SRT 10 exhaust sound (MUST hear!!!)



    I could see on that video that that bypass system would not free the resonators and the catalytic converters.

    What came up is to use some cheap wastegates off Ebay (for around $100 each) with 2-1/2" openning, and place them somewhere before the cats.
    Apart from the noise, I suppose that will make some power improvement in combination with the Mopar PCM.


    Here is the wastegate.
    [​IMG]



    Here is the elbow pipe that I had to weld and cut an etension for reaching the correct length.
    [​IMG]



    Here is also how it is planned to be welded
    [​IMG]



    Another picture also of the planning with the wastegate.
    [​IMG]


    As about the control of the wastegate valve, I am thinking of stealing some vacuum off the power brake booster tank and make the management when in WOT and at some certain RPMs.

    I will keep updated for anything new that will come up.

    I am open to comments and any advices.


    George
     
  2. Black Moon

    Black Moon Viper Owner

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    Last edited: Dec 15, 2010
  3. Herc

    Herc Viper Owner

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    Not sure if I would cut my cat up, those things are not cheap. Where are you going to run the hot
    exhaust? Out the bottom right by the foot well?

    Herc
     
  4. TowDawg

    TowDawg Viper Owner

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    Damn Sal! Been drinking a little? lol
     
  5. TowDawg

    TowDawg Viper Owner

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    Honestly, I think mine sounds better and louder than the one in the video.
     
  6. Black Moon

    Black Moon Viper Owner

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    Pain pills not alcohol. Plus i've been hanging with Tweester!!!!
     
  7. Black Moon

    Black Moon Viper Owner

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    Fixed it for you. That's what I get for spilling Mt Dew on keyboard (again)!!!!!
     
    Last edited: Dec 15, 2010
  8. VIPER PIT

    VIPER PIT Viper Owner

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    I think it would be cool to see flames coming out the side pipes at WOT
     
  9. Black Moon

    Black Moon Viper Owner

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    That ain't gonna happen under normal circumstances. If it does you had better check your tune because it's running way too rich.
     
  10. plumcrazy

    plumcrazy Viper Owner

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    one of the most retarded things ive seen on this site.

    throw in the tornado air filter thingy and you have quite the ricer. if this was the alley, id have a few more ideas and bits of advice for ya......
     
  11. Rizzo

    Rizzo Viper Owner

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    I've heard what a stock Viper sounds like without any exhaust attached at the headers which is basically what you are doing and it sounds like crap. Not to mention it is deafeningly loud. You wont last 5 mins driving around like that. The first time you hit the gas your ear drums will blow out and everyone within a 10 mile radius will think a tractor just exploded.
     
  12. TowDawg

    TowDawg Viper Owner

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    I actually thought it sounded pretty damn mean when I cranked it up with open headers. WAY too loud though (and I like loud). You would be deaf and pulled over every time you passed a cop for noise pollution.
     
  13. Black Moon

    Black Moon Viper Owner

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    :rolaugh::rolaugh::rolaugh:
     
  14. plumcrazy

    plumcrazy Viper Owner

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    here is the best sounding SRT in my opinion.

    [media]http://www.youtube.com/watch?v=KUNrTV9y5I0[/media]
     
  15. ROCKET62

    ROCKET62 Has Left the Room!

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    Looks like it's going to be a long winter :crazy2:
     
  16. ILLSMOQ

    ILLSMOQ Enthusiast

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    probably sounds different because your bypass valves have a smaller id than a 2.5" cutout
     
  17. tzortzViper

    tzortzViper Viper Owner

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    Those electric cutouts I have read that they do not last working for a long time, because the heat easily melts the insulation within the motor that makes the movement of the butterfly.


    Secondly, they are quite slow to open and close instantly.


    And last, the butterfly cutout compared to the wastegate valves, does not close completely, and especially after extended use.
     
    Last edited: Dec 16, 2010
  18. tzortzViper

    tzortzViper Viper Owner

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    Right, inlet is 2.5" but the outlet is 1-3/4".

    Also, the exhausts gases will go out down exactly under the cats. There is a big openning.

    Those cats are out of a wrecked Gen3, so if I dont like it I can change it back easily.


    .
     
    Last edited: Dec 16, 2010
  19. tzortzViper

    tzortzViper Viper Owner

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    Can you please be specific, why you call it "retarded"?




    .
     
  20. plumcrazy

    plumcrazy Viper Owner

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    no, thats all you get.
     
  21. tzortzViper

    tzortzViper Viper Owner

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    Better dont post if you cannot support it.


    ps. 12,913 BS




    .
     
  22. plumcrazy

    plumcrazy Viper Owner

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    I shouldn't need to. i think its obvious.

    PS: Shuush
     
  23. tzortzViper

    tzortzViper Viper Owner

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    It is obvious to a smart-guy like you. Please explain to us, the "retarded".

    ps. 12,914 BS (and keep going)





    .
     
  24. plumcrazy

    plumcrazy Viper Owner

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    nope...........
     
  25. eucharistos

    eucharistos Viper Owner

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    fine banter :2tu:
     
  26. ILLSMOQ

    ILLSMOQ Enthusiast

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    this is one of those scenarios where "less is more"
     
  27. tzortzViper

    tzortzViper Viper Owner

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    I am just too curious to see what hp increase can be achieved, in combination with the Mopar PCM, with such a mod.

    I could not find anywhere any dyno results of before and after cat-resonator-exhaust removal.

    Maybe because nobody could stay in the dynoshop with such a noisiness!? :omg:






    .
     
  28. RichieSRT10

    RichieSRT10 Enthusiast

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    Thanks Phil. After I passed Gary who was filming I had to come off the throttle quickly at the end of the video. I had some bird watchers running out of the woods flapping their arms and screaming that I made some red swallow birdies fly away:lmao:
     
  29. Viper Specialty

    Viper Specialty Viper Owner

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    1. You cant cut that cat there. Try and and you will see why, lol

    2. You wont gain a thing.

    3. How are you planning on opening that wastegate? Wastegates require HIGH exhaust back pressures to open them, something you don't have. You also have zero manifold vacuum at WOT to use to pull it open.
     
  30. johnk

    johnk Enthusiast

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    Please don't cloud this thread with facts.....;) :D
     

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