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    991 1 GT3 exhaust valve

    Hey guys

     

    I just wanted to ask if the valve can open any earlier? It does seem to kick in untill 3500rpm which means on your normal drive it sounds a little mute


    Re: 991 1 GT3 exhaust valve

    You can retrofit a switch to control the valve manually.

    or you could unplug it and have it open all the time, but beware of some drone in a particular rev range.


    --

    White 991.2 GT3, V260 March 2018


    Re: 991 1 GT3 exhaust valve

    Do you know where i could get said switch?


    Re: 991 1 GT3 exhaust valve

    http://www.carnewal.com


    --

    1992 Mercedes-Benz W124 500E / 2003 BMW M3 CSL (sold) / 2008 Porsche 911 GT3 RS (sold) / 2014 BMW-Alpina D3 biturbo Touring / 2014 BMW-Alpina B3 biturbo Touring Allrad / 2018 Porsche 911 GT3 Clubsport


    Re: 991 1 GT3 exhaust valve

    Gauss:

    You can retrofit a switch to control the valve manually.

    or you could unplug it and have it open all the time, but beware of some drone in a particular rev range.

    The switch is the cleanest (and safest) solution. Smiley

    In some countries, especially in Europe (Germany for example), this is illegal. It can have an impact with the insurance company (in case of an accident) because backpressure is changed and they can argue that power can change in certain rev figures. Also, in Germany, you loose the certification of the whole car, which can be a huge problem in case of an accident. Another issue: Tax eviction.

    Not trying to be a party pooper here but it is good if people know the consequences. This is also the reason why a switch is better than a permanently open exhaust, which could be easily "detectable" by the police/authorities.


    --

    RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)


    Re: 991 1 GT3 exhaust valve

    I couldnt see on that website where the switch is? 


    Re: 991 1 GT3 exhaust valve

    jamesdamanuk1:

    I couldnt see on that website where the switch is? 

    Not sure Carnewal has such a switch for the GT3 but if your mechanic is halfway talented (and willing...), this shouldn't be a problem. Smiley


    --

    RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)


    Re: 991 1 GT3 exhaust valve

    Can mechanic build a switch? I dont want it to be silly and iwould like to be able to control it. 


    Re: 991 1 GT3 exhaust valve

    jamesdamanuk1:

    Can mechanic build a switch? I dont want it to be silly and iwould like to be able to control it. 

    Yes, like I said...if he is halfway capable. Smiley

    I do not know the GT3 valve control too well and maybe Porsche has implemented measures to prevent a switch but I doubt it.


    --

    RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)


    Re: 991 1 GT3 exhaust valve

    I dont know anyone is the issue :-/ not that i would let loose on my GT3! I was 3 settings so the normal button off then on the on on haha


    Re: 991 1 GT3 exhaust valve

    IMG_5317.JPGBeing able to customize is half the fun. 

    Here is an example of what is on the highway in American. ( on my way to COTA )

     


    Re: 991 1 GT3 exhaust valve

    Haha i want a device to open the exhaust earlier not herby lol


    Re: 991 1 GT3 exhaust valve

    RC:
    Gauss:

    You can retrofit a switch to control the valve manually.

    or you could unplug it and have it open all the time, but beware of some drone in a particular rev range.

    The switch is the cleanest (and safest) solution. Smiley

    In some countries, especially in Europe (Germany for example), this is illegal. It can have an impact with the insurance company (in case of an accident) because backpressure is changed and they can argue that power can change in certain rev figures. Also, in Germany, you loose the certification of the whole car, which can be a huge problem in case of an accident. Another issue: Tax eviction.

    Not trying to be a party pooper here but it is good if people know the consequences. This is also the reason why a switch is better than a permanently open exhaust, which could be easily "detectable" by the police/authorities.

    Can this really be such a big issue, Christian? If the valve is permanently open, the only difference is a difference in back-pressure between 2000-3500 rpm, no? Also this can’t make for a significant power increase to be taken seriously in court, can it?

    Now, if the OP were to upgrade a whole exhaust line wih updated ECU programming, that would be a different story, yet even then, we’re talking about a small percentage of power increase.

    Happy to learn and be taught otherwise.


    --

    White 991.2 GT3, V260 March 2018

     


    Re: 991 1 GT3 exhaust valve

    Yeh i dont wish to change the exhaust just open it up a bit


    Re: 991 1 GT3 exhaust valve

    jamesdamanuk1:

    I couldnt see on that website where the switch is? 

    http://www.carnewal.com/products/P97;P87;P97GT3/p97084/PSE-Manual-Control


    --

    1992 Mercedes-Benz W124 500E / 2003 BMW M3 CSL (sold) / 2008 Porsche 911 GT3 RS (sold) / 2014 BMW-Alpina D3 biturbo Touring / 2014 BMW-Alpina B3 biturbo Touring Allrad / 2018 Porsche 911 GT3 Clubsport


    Re: 991 1 GT3 exhaust valve

    That looks to be for 997 not 991?


    Re: 991 1 GT3 exhaust valve

    jamesdamanuk1:

    That looks to be for 997 not 991?

    It's the same product, but contact Gert at Carnewal he'll inform you.


    --

    1992 Mercedes-Benz W124 500E / 2003 BMW M3 CSL (sold) / 2008 Porsche 911 GT3 RS (sold) / 2014 BMW-Alpina D3 biturbo Touring / 2014 BMW-Alpina B3 biturbo Touring Allrad / 2018 Porsche 911 GT3 Clubsport


    Re: 991 1 GT3 exhaust valve

    Quite a few specialists in UK, depending on where you're based. I can recommend: https://rpmtechnik.co.uk/


    Re: 991 1 GT3 exhaust valve

    Gauss:
    RC:
    Gauss:

    You can retrofit a switch to control the valve manually.

    or you could unplug it and have it open all the time, but beware of some drone in a particular rev range.

    The switch is the cleanest (and safest) solution. Smiley

    In some countries, especially in Europe (Germany for example), this is illegal. It can have an impact with the insurance company (in case of an accident) because backpressure is changed and they can argue that power can change in certain rev figures. Also, in Germany, you loose the certification of the whole car, which can be a huge problem in case of an accident. Another issue: Tax eviction.

    Not trying to be a party pooper here but it is good if people know the consequences. This is also the reason why a switch is better than a permanently open exhaust, which could be easily "detectable" by the police/authorities.

    Can this really be such a big issue, Christian? If the valve is permanently open, the only difference is a difference in back-pressure between 2000-3500 rpm, no? Also this can’t make for a significant power increase to be taken seriously in court, can it?

    Now, if the OP were to upgrade a whole exhaust line wih updated ECU programming, that would be a different story, yet even then, we’re talking about a small percentage of power increase.

    Happy to learn and be taught otherwise.


    --

    White 991.2 GT3, V260 March 2018

     

    In Germany? Huge issue, incl. that tax evasion thing. Other countries? Don't have a clue.

    Bavarian police officers are on the lookout for loud cars and there is already a special task force in the Munich area which knows all tricks. They stopped me once in my R8 and looked exactly for the mods usually common with R8 drivers. If they find something, they can confiscate the car on the spot and good luck with the rest. Usually this results in fines/payments of over 1100 EUR plus the risk of a tax evasion accusation and all that trouble (time is money). Ask some Munich Audi and Porsche drivers...they could tell you stories. In the case of an accident, well...insurances are just waiting for people modding their expensive cars, so they don't have to pay up fully.

    The general population has started to resent loud cars and politics/government followed. Meaning: It is a good idea not to attract too much attention in Germany, especially in larger cities. With that new street racing law, things got even worse. Police can basically do what they want if they think you did something wrong in your sportscar. They can confiscate your car on the spot and "apologize" later.


    --

     

    RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)

     


     
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