Changing my 981 Cayman S for 718 GT4
Discussion
Hello, I am considering trading in my 981 Cayman S for a GT4. I test drove one at my Porsche dealership today, and the car felt amazing, however as per most posts on this forum, the lack of sound theater lets the car down a little, if that is your thing, in which for me, it is :-)
First of all, apologies for another exhaust thread, but I have read all of them on here and Rennlist.
I'm 99% sure I will go ahead with the part exchange, so I am planning some exhaust mods in the background too.
I now understand that the full exhaust setup basically comprises of 3 variable parts (Headers, Over Axle Pipes, Rear Muffler).
I am a little confused with what I can do because of the EU regulations. A lot of the information on Rennlist is for US based cars.
Can anyone help with the following;
A. Your Favourite Setup - What is the best setup of the 3 main variables that you've heard. This is my favourite so far, it seems to be a Soul Over Axle Pipes on a Schmid Motorsport rear muffler -
https://www.youtube.com/watch?v=-4igN7FPcG0
What is your favourite setup so far?
B. Valid - Can anyone confirm what I can do in the UK, both from warranty and legal perspective
C. Computer Overwrite: Will lights start appearing on my dash if I change some of the 3 parts?
D. Idle - Most of the exhausts I hear on YouTube are of the cars driving hard to the red line, however one of my favourite sounds of a car, is when it is in idle or crawling in first gear. Which of the 3 main exhaust parts best help the idle / 1st gear sound?
E. Valves - I understand the valves are in the Rear Muffler part, so I presume you can get an part that just keeps the valves open all of the time? OR is it better to get a valve controller? I presume this connects into the existing exhaust button?
First of all, apologies for another exhaust thread, but I have read all of them on here and Rennlist.
I'm 99% sure I will go ahead with the part exchange, so I am planning some exhaust mods in the background too.
I now understand that the full exhaust setup basically comprises of 3 variable parts (Headers, Over Axle Pipes, Rear Muffler).
I am a little confused with what I can do because of the EU regulations. A lot of the information on Rennlist is for US based cars.
Can anyone help with the following;
A. Your Favourite Setup - What is the best setup of the 3 main variables that you've heard. This is my favourite so far, it seems to be a Soul Over Axle Pipes on a Schmid Motorsport rear muffler -
https://www.youtube.com/watch?v=-4igN7FPcG0
What is your favourite setup so far?
B. Valid - Can anyone confirm what I can do in the UK, both from warranty and legal perspective
C. Computer Overwrite: Will lights start appearing on my dash if I change some of the 3 parts?
D. Idle - Most of the exhausts I hear on YouTube are of the cars driving hard to the red line, however one of my favourite sounds of a car, is when it is in idle or crawling in first gear. Which of the 3 main exhaust parts best help the idle / 1st gear sound?
E. Valves - I understand the valves are in the Rear Muffler part, so I presume you can get an part that just keeps the valves open all of the time? OR is it better to get a valve controller? I presume this connects into the existing exhaust button?
LamboPH said:
Hello, I am considering trading in my 981 Cayman S for a GT4. I test drove one at my Porsche dealership today, and the car felt amazing, however as per most posts on this forum, the lack of sound theater lets the car down a little, if that is your thing, in which for me, it is :-)
First of all, apologies for another exhaust thread, but I have read all of them on here and Rennlist.
I'm 99% sure I will go ahead with the part exchange, so I am planning some exhaust mods in the background too.
I now understand that the full exhaust setup basically comprises of 3 variable parts (Headers, Over Axle Pipes, Rear Muffler).
I am a little confused with what I can do because of the EU regulations. A lot of the information on Rennlist is for US based cars.
Can anyone help with the following;
A. Your Favourite Setup - What is the best setup of the 3 main variables that you've heard. This is my favourite so far, it seems to be a Soul Over Axle Pipes on a Schmid Motorsport rear muffler -
https://www.youtube.com/watch?v=-4igN7FPcG0
What is your favourite setup so far?
B. Valid - Can anyone confirm what I can do in the UK, both from warranty and legal perspective
C. Computer Overwrite: Will lights start appearing on my dash if I change some of the 3 parts?
D. Idle - Most of the exhausts I hear on YouTube are of the cars driving hard to the red line, however one of my favourite sounds of a car, is when it is in idle or crawling in first gear. Which of the 3 main exhaust parts best help the idle / 1st gear sound?
E. Valves - I understand the valves are in the Rear Muffler part, so I presume you can get an part that just keeps the valves open all of the time? OR is it better to get a valve controller? I presume this connects into the existing exhaust button?
Hi there,First of all, apologies for another exhaust thread, but I have read all of them on here and Rennlist.
I'm 99% sure I will go ahead with the part exchange, so I am planning some exhaust mods in the background too.
I now understand that the full exhaust setup basically comprises of 3 variable parts (Headers, Over Axle Pipes, Rear Muffler).
I am a little confused with what I can do because of the EU regulations. A lot of the information on Rennlist is for US based cars.
Can anyone help with the following;
A. Your Favourite Setup - What is the best setup of the 3 main variables that you've heard. This is my favourite so far, it seems to be a Soul Over Axle Pipes on a Schmid Motorsport rear muffler -
https://www.youtube.com/watch?v=-4igN7FPcG0
What is your favourite setup so far?
B. Valid - Can anyone confirm what I can do in the UK, both from warranty and legal perspective
C. Computer Overwrite: Will lights start appearing on my dash if I change some of the 3 parts?
D. Idle - Most of the exhausts I hear on YouTube are of the cars driving hard to the red line, however one of my favourite sounds of a car, is when it is in idle or crawling in first gear. Which of the 3 main exhaust parts best help the idle / 1st gear sound?
E. Valves - I understand the valves are in the Rear Muffler part, so I presume you can get an part that just keeps the valves open all of the time? OR is it better to get a valve controller? I presume this connects into the existing exhaust button?
Apologies for jumping on this thread as I have to admit that I am not answering the question you have about exhaust mods. However I am in the market for a 981 Cayman. I was going to direct message you about that, but your profile wouldn't accept direct messages. If you would be able to drop me a line that would be much appreciated. Thanks, Andy.
You can change anything you like about the rear muffler without worrying about any ECU changes or being in breach of regulations. I’m not sure which part the over axle pipes are but if they’re after the GPF then you can change them too without issue. The problems will occur when people remove the GPFs.
Personally I think some of the problem is the valve control with the valves being closed from ~1.6k-4k, this is an easy fix with the stock exhaust though some have said they prefer it with an aftermarket exhaust as otherwise there would be too much drone in the cabin at cruising speeds. People have also said that the sound improves with more miles on the car as the GPF starts to open up, though that’s incredibly anecdotal. It’s still possibly too loud for some track days as stock so bear that in mind.
I’m not happy with the whole GPF thing, but if that’s what it takes to keep producing large displacement ICE cars, then so be it.
Personally I think some of the problem is the valve control with the valves being closed from ~1.6k-4k, this is an easy fix with the stock exhaust though some have said they prefer it with an aftermarket exhaust as otherwise there would be too much drone in the cabin at cruising speeds. People have also said that the sound improves with more miles on the car as the GPF starts to open up, though that’s incredibly anecdotal. It’s still possibly too loud for some track days as stock so bear that in mind.
I’m not happy with the whole GPF thing, but if that’s what it takes to keep producing large displacement ICE cars, then so be it.
Removing the over axle pipes will require an ECU remap as they're monitored here in the UK and EU. Bye bye engine warranty if you do that, plus the car is now GPF-less and potentially not road legal.
Swapping the rear silencer only is the best option, plus you can stick the valves open if you really want to although this will increase the likelihood of droning.
I'm hopefully having a replacement silencer (only) fitted on Friday, I've not considered doing anything else for the reasons above.
Swapping the rear silencer only is the best option, plus you can stick the valves open if you really want to although this will increase the likelihood of droning.
I'm hopefully having a replacement silencer (only) fitted on Friday, I've not considered doing anything else for the reasons above.
My favourite is the JCR, but they are very expensive.
My GT is here soon hopefully. Will run her in first and ppf front and sills.
I keep talking myself out of the exhaust change but that JCR does sound good
Supersprint do one for about half the price of the JCR but it is SS and not titanium.
My GT is here soon hopefully. Will run her in first and ppf front and sills.
I keep talking myself out of the exhaust change but that JCR does sound good
Supersprint do one for about half the price of the JCR but it is SS and not titanium.
gtsralph said:
Pointless unless it's a pure track car if you can't get an MOT, and with the remap bye bye resale value...GT4 has 3-cylinder running, or "adaptive cylinder control", and I suspect design of the exhaust system is critical - because it must work correctly in both 6-cylinder and 3-cylinder modes. It suggests caution may be advised as regards bolting on an aftermarket system.
"A special innovation to reduce exhaust emissions and fuel consumption is the adaptive cylinder control. At engine speeds of between 1,600 and 3,000 rpm and a load request of up to a maximum torque of 100 Nm, it temporarily interrupts the injection process of one of the two engine banks, and the six-cylinder engine temporarily operates in three-cylinder mode. At constant load, the cylinder bank is changed every 20 seconds to ensure a uniform load and flow through the catalytic converters. With the exception of a slightly different sound profile, this switching back and forth goes unnoticed by the driver. The effect, however, is palpable: the adaptive cylinder control can reduce the CO2 emissions by around 11 grams per kilometre. It can be deactivated together with the start/stop function, which is featured for the first time in the 718 Cayman GT4 and 718 Spyder."
https://newsroom.porsche.com/en/press-kits/718-spy...
"A special innovation to reduce exhaust emissions and fuel consumption is the adaptive cylinder control. At engine speeds of between 1,600 and 3,000 rpm and a load request of up to a maximum torque of 100 Nm, it temporarily interrupts the injection process of one of the two engine banks, and the six-cylinder engine temporarily operates in three-cylinder mode. At constant load, the cylinder bank is changed every 20 seconds to ensure a uniform load and flow through the catalytic converters. With the exception of a slightly different sound profile, this switching back and forth goes unnoticed by the driver. The effect, however, is palpable: the adaptive cylinder control can reduce the CO2 emissions by around 11 grams per kilometre. It can be deactivated together with the start/stop function, which is featured for the first time in the 718 Cayman GT4 and 718 Spyder."
https://newsroom.porsche.com/en/press-kits/718-spy...
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