SOUL | 718 GT4/Spyder Exhaust Development
06-01-2020, 03:36 PM
#61
Remove vacuum lines
PSE Programming
This is where things get interesting. European sound restrictions have been getting more and more severe over the last decade or so. Every time a new GT car comes out from Porsche, the PSE programming becomes more and more invasive in controlling the sound level of the car on full throttle. As many of you I’m sure have experienced on your previous Porsches, even with the PSE button pushed the programming will override this and close the valves until you reach a higher rpm range. The 718 GT4 is no different, and in fact it’s worse. With the button pushed, the 991 GT3 I drove the other week would shut the valves on hard throttle and then reopen around 3500rpm. With the button pushed, this GT4 keeps the valves closed until about 5000rpm. Now more than ever, the most inexpensive mod on sound you can perform on a GT car is unhooking the vacuum lines from the valves and plugging the lines so you don’t have a vacuum leak. Especially when unrestricting the exhaust upstream it makes a huge difference. Take the over axle pipes for example, below is a video where I drove this GT4 with our prototype over axle cat delete pipes. There are two takeoff clips in that video, the first take off clip is with the vacuum lines pulled and the valves in the default open position. The second take off clip has a large truck in it, during this one the PSE button was pushed/active for that takeoff and you can hear the valves close and then open at about 5k rpm. Completely different sound experience.TIA!
06-02-2020, 11:20 AM
#62
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Sorry to throw another brands product in here (not sure if you offer something similar) but would this work with valves?
(Awesome thread by the way, thanks for such good honest information)
https://www.cargraphic.de/en/your-ve...l/exflaprcpo1/
(Awesome thread by the way, thanks for such good honest information)
https://www.cargraphic.de/en/your-ve...l/exflaprcpo1/
06-02-2020, 06:58 PM
#63
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Agreed, but consider who has the deeper pockets to go through this process if lawyers get involved and if the failure causes your car to be unusable until repaired who has lost the use of their car?
Additionally (from first hand experience) you can be denied the option (through Porsche) to extend the warranty if your vehicle is not stock.
Is there any Porsche (manufacturer not dealer) approved after market exhausts?
Additionally (from first hand experience) you can be denied the option (through Porsche) to extend the warranty if your vehicle is not stock.
Is there any Porsche (manufacturer not dealer) approved after market exhausts?
I can answer this now - no. And I'm about 95% sure there won't be.
In fact, there are minimal manufacturer approved aftermarket parts from any manufacturer.
Ford has some "Ford Performance" accessories, FCA has "Mopar" (to name the couple I can think of off-hand).
Chances are, if it's not made by Porsche and installed by a dealer, you're riding in the gray area.
In fact, there are minimal manufacturer approved aftermarket parts from any manufacturer.
Ford has some "Ford Performance" accessories, FCA has "Mopar" (to name the couple I can think of off-hand).
Chances are, if it's not made by Porsche and installed by a dealer, you're riding in the gray area.
Best Regards,
John Gaydos
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SOUL PERFORMANCE PRODUCTS
Quality Exhaust Solutions, Fair Pricing, and Outstanding Service
John Gaydos- Owner, Performance Specialist
Cell - (484) 883-6197
johng@soulpp.com
Jon Wheel - Marketing Manager
jwheel@soulpp.com
06-02-2020, 06:59 PM
#64
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Quick question here just to make sure I don't mess up. I see the vacuum lines are connected to the actuator on the muffler with a crimped clamp. To remove I need to break that lip on the clamp and pull them off? Then plug the lines and secure them somehow to not leave them hanging of course.
TIA!
TIA!
Sorry to throw another brands product in here (not sure if you offer something similar) but would this work with valves?
(Awesome thread by the way, thanks for such good honest information)
https://www.cargraphic.de/en/your-ve...l/exflaprcpo1/
(Awesome thread by the way, thanks for such good honest information)
https://www.cargraphic.de/en/your-ve...l/exflaprcpo1/
Best regards,
John Gaydos
06-03-2020, 10:50 AM
#65
Rennlist Member
I purchased my car, CPO, with an aftermarket exhaust on the car sitting in the showroom before the sale was completed. And I did document it's presence with a few photos on the showroom floor. Today's digital cameras with GPS and date coding are a wonderful bit of tech.
06-03-2020, 11:29 AM
#66
RL Community Team
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Interesting but this does not prove much at all, the CPO warranty was likely in place before the exhaust was added, or it was not disclosed to Porsche before the CPO was granted. Still a grey area, a Porsche warranty is not underwritten by the dealer.
06-04-2020, 12:40 AM
#67
Car has to be stock for CPO to be applied. After CPO, no prob.
Dealers can be aftermarket friendly, as John said it's relationship and depends on what you are doing. Worst case you/they put the OE parts on before they have to claim warranty depending on the claim.
Akrapovic partners with Audi in UK and maybe EU. This was couple years ago not sure if still valid.
Dealers can be aftermarket friendly, as John said it's relationship and depends on what you are doing. Worst case you/they put the OE parts on before they have to claim warranty depending on the claim.
Akrapovic partners with Audi in UK and maybe EU. This was couple years ago not sure if still valid.
06-04-2020, 12:44 AM
#68
So if I change my over axle pipes first, I'll get more sound despite what the PSE controller does because the valves are on the centre muffler, right?
06-04-2020, 12:00 PM
#69
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Best regards,
John Gaydos
06-04-2020, 12:10 PM
#70
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As for poof, it proves you dont know what you are talking about and you didnt think before speculating on the condition of my car at point of sale. I purchased my first Porsche in 1970. I've participated in this rodeo on numerous occasions.
06-04-2020, 12:37 PM
#71
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Somebody woke up on the wrong side of bed, and you bought a Porsche back in the 70's, good for you but it proves nothing... not a big fan of rodeo's either. 
The fact that the CPO was processed with the pipe on also means nothing, did you confirm that it was disclosed to Porsche, I doubt it.
My original comment stands.
The fact that the CPO was processed with the pipe on also means nothing, did you confirm that it was disclosed to Porsche, I doubt it.
My original comment stands.
06-10-2020, 12:05 PM
#72
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Thank you everyone for your interest. We'll have another update shortly. We're interested in gauging if anyone has their car available now and is interested in independently dyno testing our upcoming products. Please shoot us a message if you're able and interested in this initiative.
-Mike
-Mike
06-12-2020, 02:39 PM
#73
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Hey Guys,
Many have asked for an an explanation of the PSE muffler on the new GT4/Spyder/GTS (especially you Tom!). We put some time aside today for me to walk you through it, and scope the inside of the exhaust so you can visualize how it works. Below is a breakdown of what's going on in the video as well. Let me know if you have any questions! Be kind, I'm not a public speaker haha.
0-3:10 : Intro/Explanation
3:10 - 3:40 Valves Open Flow Path. From right side particulate filter to right side exhaust tip. Welding rod shows right side tip outlet.
3:40 - 4:07 Valves Closed Flow Path. Entering muffler from right side particulate filter into the first chamber. Before entering through perforated wall into the center mixing chamber.
4:07 - 4:30 Valved Closed Flow Path. Moving in reverse against flow path from the left side tip exit (shown by welding rod) into the center mixing chamber.
4:30 - 4:55 Valved Closed Flow Path. Moving with the flow path from the center mixing chamber and exiting out of the muffler via the right side tip exit.
Best regards,
John Gaydos
Many have asked for an an explanation of the PSE muffler on the new GT4/Spyder/GTS (especially you Tom!). We put some time aside today for me to walk you through it, and scope the inside of the exhaust so you can visualize how it works. Below is a breakdown of what's going on in the video as well. Let me know if you have any questions! Be kind, I'm not a public speaker haha.
0-3:10 : Intro/Explanation
3:10 - 3:40 Valves Open Flow Path. From right side particulate filter to right side exhaust tip. Welding rod shows right side tip outlet.
3:40 - 4:07 Valves Closed Flow Path. Entering muffler from right side particulate filter into the first chamber. Before entering through perforated wall into the center mixing chamber.
4:07 - 4:30 Valved Closed Flow Path. Moving in reverse against flow path from the left side tip exit (shown by welding rod) into the center mixing chamber.
4:30 - 4:55 Valved Closed Flow Path. Moving with the flow path from the center mixing chamber and exiting out of the muffler via the right side tip exit.
Best regards,
John Gaydos
The following 4 users liked this post by Soul Performance:
06-12-2020, 03:42 PM
#74
Rennlist Member
@Soul Performance Thanks so much for this. I have a question/concern. I want to make my car sound good but not extremely loud. If I opt to keep the factory muffler and remove OPF, does it mean with PSE on, I practically don't have any muffler since the OPF was playing a role to muffle the sound and PSE on just bypasses the muffler?
06-12-2020, 03:47 PM
#75
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@Soul Performance Thanks so much for this. I have a question/concern. I want to make my car sound good but not extremely loud. If I opt to keep the factory muffler and remove OPF, does it mean with PSE on, I practically don't have any muffler since the OPF was playing a role to muffle the sound and PSE on just bypasses the muffler?
Best Regards,
John Gaydos