daz05 Posted April 10, 2017 Report Share Posted April 10, 2017 I've been thinking about whether or not it's possible to retrofit the sound symposer from the GTS. As per the 991 design I hope it is just a sound membrane tube from airbox into cabin. It appears that the GTS and S share an airbox so perhaps a case of buying the part and installing it. I had read that the outlet into the cabin in behind the firewall carpet and so I thought I'd take a look. I was pleased to find that my car had the hole with a blanking cover. Unfortunately, there is nothing behind the plate but it gave me some confidence that it's something that can be done. Is there anyone on here with a GTS that would be willing to pull the carpet back and investigate further? There is some further information in this thread on Planet 9. http://www.planet-9.com/981-cayman-and-boxster-modifications/96990-i-want-sound-symposer-2.html#/topics/96990?page=1 Link to comment Share on other sites More sharing options...
Jonttt Posted April 10, 2017 Report Share Posted April 10, 2017 What would that do more than the pics on the link you provided ? Link to comment Share on other sites More sharing options...
daz05 Posted April 10, 2017 Author Report Share Posted April 10, 2017 If you mean the sound symposer, it takes actual induction sound and makes it louder in the cabin. The GTS pipes sound in through that hole likewise with the 3.4 911. Link to comment Share on other sites More sharing options...
topradio Posted April 10, 2017 Report Share Posted April 10, 2017 So they knock a hole in the bulkhead! Link to comment Share on other sites More sharing options...
daz05 Posted April 10, 2017 Author Report Share Posted April 10, 2017 The hole is already there it just has a rubber cap blocking it up. Link to comment Share on other sites More sharing options...
topradio Posted April 10, 2017 Report Share Posted April 10, 2017 No, I mean that the SS is not much more that a hole? Link to comment Share on other sites More sharing options...
daz05 Posted April 11, 2017 Author Report Share Posted April 11, 2017 I wasn't hoping someone with a GTS would be kind enough to take a look back there and tell us what's in place. I expect to see some kind of tubing with a one way valve inside connected to the air box. If we can obtain the part number it may be fairly easy to retrofit. Link to comment Share on other sites More sharing options...
Araf Posted April 11, 2017 Report Share Posted April 11, 2017 15 hours ago, topradio said: No, I mean that the SS is not much more that a hole? And a tube from the airbox to the hole with a butterfly in the tube, from what I gather. Link to comment Share on other sites More sharing options...
daz05 Posted April 11, 2017 Author Report Share Posted April 11, 2017 This video demonstrates how to gain access behind the carpet, very easy. Start around 5 mins. Link to comment Share on other sites More sharing options...
daz05 Posted April 21, 2017 Author Report Share Posted April 21, 2017 Don't know if there is any interest in this but I've now found the solution (or at least I hope I have). The required parts are either here or on order, drivers side airbox housing, symposer and connector tube and hope to install shortly. Hoping it will sound like this - skip to 2mins. Link to comment Share on other sites More sharing options...
Leonard Posted April 21, 2017 Report Share Posted April 21, 2017 Nice work. I'm definitely interested, looking forward to reading how you get on Link to comment Share on other sites More sharing options...
daz05 Posted May 1, 2017 Author Report Share Posted May 1, 2017 It is possible, the required parts are around £250 new or less if you find them online from a dismantler, it should be simple but since access is a pain you would be best getting an independent garage to do some of the install since access will be difficult. If you are planning on installing the upgraded plenum and throttle body I've read about online you could do this at the same time for minimal cost /effort and your car will sound like the video above. Link to comment Share on other sites More sharing options...
Leonard Posted May 1, 2017 Report Share Posted May 1, 2017 Just PM'd you but thanks for researching this, amazing work Link to comment Share on other sites More sharing options...
ar3910 Posted May 28, 2020 Report Share Posted May 28, 2020 Hi, sorry to revive such an old thread, did you ever fit the sound symposer in your S? Did it make much difference? Thanks Link to comment Share on other sites More sharing options...
GTSMarky Posted May 28, 2020 Report Share Posted May 28, 2020 On 4/11/2017 at 12:26 PM, daz05 said: I wasn't hoping someone with a GTS would be kind enough to take a look back there and tell us what's in place. I expect to see some kind of tubing with a one way valve inside connected to the air box. If we can obtain the part number it may be fairly easy to retrofit. I can have a look in mine later on Daz.. Will report back. Link to comment Share on other sites More sharing options...
daz05 Posted May 28, 2020 Author Report Share Posted May 28, 2020 Hi guys, this is now all installed and I love it. the induction roar noise at the top end and into next gear is sublime. @GTSMarky, @ar3910 3m 43s in you can see the piping, it connects from the airbox to a small hole in firewall. Link to comment Share on other sites More sharing options...
GTSMarky Posted May 28, 2020 Report Share Posted May 28, 2020 1 hour ago, daz05 said: Hi guys, this is now all installed and I love it. the induction roar noise at the top end and into next gear is sublime. @GTSMarky, @ar3910 3m 43s in you can see the piping, it connects from the airbox to a small hole in firewall. Brilliant - I am a spanner sometimes as I didn't twig this was from 2017 originally.. Good job I went for a cycle first instead of pulling the car interior apart.. Link to comment Share on other sites More sharing options...
daz05 Posted May 28, 2020 Author Report Share Posted May 28, 2020 2 hours ago, GTSMarky said: Brilliant - I am a spanner sometimes as I didn't twig this was from 2017 originally.. Good job I went for a cycle first instead of pulling the car interior apart.. 😂😂😂 That would have been hilarious. Link to comment Share on other sites More sharing options...
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