27.10.2017 08:38:00
- jamesdamanuk1
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Board: Porsche - 911 - 991 - GT2/GT3
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27.10.2017 09:10:41
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Gauss
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27.10.2017 09:27:07
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Re: 991 1 GT3 exhaust valve
--
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. 
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)
27.10.2017 11:38:52
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RC
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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. 
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RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)
27.10.2017 11:45:39
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RC
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- Antwort auf: jamesdamanuk1
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. 
I do not know the GT3 valve control too well and maybe Porsche has implemented measures to prevent a switch but I doubt it.
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RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)
27.10.2017 11:54:24
- jamesdamanuk1
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27.10.2017 11:55:28
- Leawood911
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27.10.2017 11:57:23
- jamesdamanuk1
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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.
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
27.10.2017 12:33:44
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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
27.10.2017 12:37:57
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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
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.
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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