tob_today Posted May 25, 2023 Report Share Posted May 25, 2023 My 987.1 RS60 came with factory Porsche Sports Exhaust. I believe this was tweaked slightly over regular 987.1 PSE but assume not significantly. When turning PSE on via dash switch (to open valves) the exhaust sounds great at low RPMs and high RPMs, however between 2.5k and 4k it seems to become more muted. There is also a slight buzzing sound from exhaust at around these RPM points. It's as if the car is muting the exhaust sound between this rev range by adjusting the valves. I know Porsche did this with early 996.1 and more recent cars, something about reducing drive-by noise, which lots of people like to disable. But wan't aware they did for this era of cars. I would expect the the dash switch to simply open / close the valves without additional RPM-based behaviours, which would be my preference. Anyone notice anything similar? Is this a known behavior with 987.1 PSE systems? Or maybe it's specific to mine? Quote Link to comment Share on other sites More sharing options...
Lonewolfgjp Posted May 25, 2023 Report Share Posted May 25, 2023 I ve heard of it on American cars but I didn’t think the European ones did it. I ve been out for a drive with Bally off the forum when he had his RS60 and it sounded epic all the time. I know there is a additional bit of kit you can buy to over ride the rpm thing but I imagine you could probably get it turned off at a specialist. I had the factory PSE on my 987.2 and it was either open or closed, same on my current 981. Quote Link to comment Share on other sites More sharing options...
phazed Posted May 26, 2023 Report Share Posted May 26, 2023 I have Balley’s RS60 and haven’t noticed what you are describing. The dash switch operates 2 solenoids that just open and close flaps on the exhaust. I wonder if the buzzing noise is the flaps rattling about on their pivots. Mine did that before I fixed them but was only audible at very low rpm. A short clip from my car running with flaps open! More on YouTube if you’re interested. Quote Link to comment Share on other sites More sharing options...
Paul P Posted May 26, 2023 Report Share Posted May 26, 2023 I have never known for sure if its a thing on UK cars - but I know that on 911 in germany there was a regular hack to prevent the "social mode" - and that police learned to look for the connections being loose. Some discussions on PH re 996 - again - a bit vague - but i have heard it cuts off around 30 mph ... https://www.pistonheads.com/gassing/topic.asp?h=0&f=48&t=834498 Quote Link to comment Share on other sites More sharing options...
tob_today Posted May 28, 2023 Author Report Share Posted May 28, 2023 Thanks for replies. My car is currently at my specialist and they confirmed the ECU is manipulating the valves at certain speeds / RPMs. This is also audible with a very slight buzzing as solenoids operate to close / open the valves I've done more research and found plenty of forum posts on US and also UK sites for both 987's and 997's confirming this is intended behaviour designed at factory, assumed for noise regulations in some countries. Seems it's possible to override either with custom switch or Cargraphics have kit solution. Apparently it's not possible to override with factory buttons without some kind of software reprogramming. Switch solution: https://www.planet-9.com/threads/manual-overide-of-factory-pse.33519/ Kit solution: https://www.cargraphic.de/en/your-vehicle/for-porsche/for-boxster/for-9871/for-34l-s/exhaust-systems-and-components-for-porsche-9871-boxster-s-34l/cargraphic-valves-control-unit-for-porsche-boxster-9871-s-34l/ Quote Link to comment Share on other sites More sharing options...
The Caped Crusader Posted May 28, 2023 Report Share Posted May 28, 2023 I have the Berty987 mod on my car and can override the PSE at any time. Only one thing I did different was that I put a small high quality rocker switch in the ashtray thereby retaining the OE look. Quote Link to comment Share on other sites More sharing options...
Dubdubz Posted June 4, 2023 Report Share Posted June 4, 2023 @The Caped Crusader What’s the berty987 mod? and where are the solenoids located? Quote Link to comment Share on other sites More sharing options...
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