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Read in another forum there’s a 7.5 A fuse you can pull to shut off the symposer. Has anyone tried that and noticed a difference between that and plugging it up?
Can you provide more information? The two 7.5A fuses I see listed in the GTK app do not mention the symposer and if you pulled either you will loose other functions...
Read in another forum there’s a 7.5 A fuse you can pull to shut off the symposer. Has anyone tried that and noticed a difference between that and plugging it up?
That is for the turbo models, for sure. I’ve done that. It’s the only 7.5 amp fuse just inside the trunk on the passenger side. It’s a very different setup than the 4.0 models.
I am not aware of a fuse to pull on the 4.0 models. Maybe you are on to something.
That is for the turbo models, for sure. I’ve done that. It’s the only 7.5 amp fuse just inside the trunk on the passenger side. It’s a very different setup than the 4.0 models.
I am not aware of a fuse to pull on the 4.0 models. Maybe you are on to something.
Sorry for the incarceration but thanks for the link, the information found in that thread may be Irrelevant as it is referring to the Soundaktor which is a speaker driven system, that fuse position may or may not be related to the Sound Symposer found in the 4.0l cars.
Interesting at least one member commented that even with the fuse pulled he felt something remained... not sure how that could be.
I think that removing the interconnecting tube and plugging the ports is the surest way to eliminate all chances of the sound being transferred to the cabin.
In other news, I was at CnC this morning, and pitt911 drove past slightly and backed into a space near me. Wow does that exhaust sound good!
It was great seeing you J, and your son! Nice to finally catch up.
Sorry for the incarceration but thanks for the link, the information found in that thread may be Irrelevant as it is referring to the Soundaktor which is a speaker driven system, that fuse position may or may not be related to the Sound Symposer found in the 4.0l cars.
Interesting at least one member commented that even with the fuse pulled he felt something remained... not sure how that could be.
I think that removing the interconnecting tube and plugging the ports is the surest way to eliminate all chances of the sound being transferred to the cabin.
My car is the one pictured in John's write up. My participation in this R&D arose from my complaining about the symposer noise to him and how I felt it was artificial and intruding into the cabin. This led to the symposer's main hose & diaphragm removal and plugging of both the cabin/firewall port and the hose that is still being activated by vacuum. Once completed, John & I took a ride to see what, if any, was the effect. The symposer's direction of intake sounds, when activated by vacuum, were now gone from the cabin. The cabin was quieter, but the engine vacuum/intake sounds could still be heard, but they emanated from the outside and were muted by the windows being up as well as the top.
Since then I have put a few hundred miles on the setup both solo and with wife(last night for about 50 miles). Both of us find the cabin quieter without the bothersome intake sound under both top up & top down conditions. Exactly what I had envisioned and wanted. Now I'm planning on installing SOUL's oap to improve the exhaust sound..
My car is the one pictured in John's write up. My participation in this R&D arose from my complaining about the symposer noise to him and how I felt it was artificial and intruding into the cabin. This led to the symposer's main hose & diaphragm removal and plugging of both the cabin/firewall port and the hose that is still being activated by vacuum. Once completed, John & I took a ride to see what, if any, was the effect. The symposer's direction of intake sounds, when activated by vacuum, were now gone from the cabin. The cabin was quieter, but the engine vacuum/intake sounds could still be heard, but they emanated from the outside and were muted by the windows being up as well as the top.
Since then I have put a few hundred miles on the setup both solo and with wife(last night for about 50 miles). Both of us find the cabin quieter without the bothersome intake sound under both top up & top down conditions. Exactly what I had envisioned and wanted. Now I'm planning on installing SOUL's oap to improve the exhaust sound..
Thanks for taking the time to share your thoughts on the outcome, from what you have said the cabin experience should be less intense and more natural, which during non-spirited driving will be welcomed...
.................Jesse and I went for a drive and noticed immediately less drone/resonance and what we'd call fake sound, which allows you to pick up on more quality and real engine and exhaust sound from outside the car. Jesse reports over the last couple days of driving the difference has continued to be quite noticeable and the car is much more comfortable to drive..........
Thanks, John, Mike. This is a critical confirmation. At least to me, make or break issue in deciding whether to get this gen. Questions:
- What are the test variables, in terms of valve programming, exhaust, etc.? I'm guessing completely stock?
- You mentioned "less drone". So, it still drones, albeit at a much lower volume? Any idea what's the source of that?
Install Kit is a good idea. I'll also go for completely ripping it off. I'll have this done during PDI.
Originally Posted by Soul Performance
.......... We were specifically looking to reduce resonance/drone valves closed at cruising speeds under light or moderate throttle, where you want to be most comfortable in cabin, and it had the intended results.
This is interesting. Every review/comment I read mentioned no drone with valves closed. With the stock programming, the valves close once start rolling and remain closed until about 4k. No one ever mentioned drone in this scenario even with slip-on exhaust and OAP.
Originally Posted by DIS295
................
Since then I have put a few hundred miles on the setup both solo and with wife(last night for about 50 miles). Both of us find the cabin quieter without the bothersome intake sound under both top up & top down conditions. Exactly what I had envisioned and wanted. Now I'm planning on installing SOUL's oap to improve the exhaust sound..
Thanks, Jesse. I would have offered my car as well if I had one and lived closed by.
Just to confirm, your car is completely stock, including valve programming? If so, one problematic scenario is, with valves open under 4k. I'm guessing you didn't get to test this scenario, if you're running with stock programming? To be precise, the valves need to be open in all RPM range and verify in different gears and throttle load. Thanks.
Car has DSC and this mod. Nothing else has been done. John & I are of the opinion that the noise pumped into the cabin contributes to the drone experience. How much it contributes is not known, but I'd guess about 50% or more. All of the frequencies are still being generated by the engine/intake/exhaust, just no longer being piped into the cabin. My norm is Sport plus via individual programming.
I did it to my buddy's 718 Cayman S. Found the information either here, at P9, or maybe some other dedicated 718 forum.
It made a huge difference though. There is a great little road by my house. We drove it out stock. Pulled the panel and the fuse (literally takes 30 seconds), then drove it back. The difference is immediately noticeable.
I never hated the sound of the 718 outside the car. It was the godawful noise in the cabin. Pulling the fuse makes a big difference there.
They actually changed up the location of the soundaktor on the 718 models. Don't remember exactly when. Maybe as early as 2018. Before it was moved it was super easy to pull a panel on the driver side of the trunk and directly disconnect the soundaktor module itself. After it was moved to the more central location it was easier to pull the 7.5amp fuse.
06-19-2021, 12:22 PM
