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O/T but can anyone explain how PSE technically works compared to an x pipe (center muffler delete) on a 991? PSE changes the center muffler, but for what reason? It seems to sound similar to the standard exhaust when PSE is “off,” so when PSE is “on,” what makes it sound louder? Does it bypass the center muffler completely?
Here are the diagrams showing the exhaust flows on the three different 991.1 exhaust variants. The first is the 3.4 with no PSE, the second is the 3.8 with no PSE, and the last is the PSE. One thing that you will notice is that the PSE has an integrated X pipe. The other is that the 3.8 non-PSE has a direct outlet from the center muffler to an exhaust tip and a valve. On the non-PSE the valve only opens in the high 3K RPM range, while on the PSE it can be commanded open by selecting PSE.
Here are the diagrams showing the exhaust flows on the three different 991.1 exhaust variants. The first is the 3.4 with no PSE, the second is the 3.8 with no PSE, and the last is the PSE. One thing that you will notice is that the PSE has an integrated X pipe. The other is that the 3.8 non-PSE has a direct outlet from the center muffler to an exhaust tip and a valve. On the non-PSE the valve only opens in the high 3K RPM range, while on the PSE it can be commanded open by selecting PSE.
LOLLLLLL I was looking at the “1” pipes scratching my head like “where TF do those go to? Why are they pointing at the back?!”
Guess I’m still getting used to “rear engine life.”
Thanks for the diagram btw. So it appears the PSE should essentially sound like an x pipe fitted non-PSE car? I want to say that my sharkwerks x pipe 3.4 sounds louder and more gruff than a PSE 3.4. But I can’t comfirm that until I drive the latter.
Thanks for the diagram btw. So it appears the PSE should essentially sound like an x pipe fitted non-PSE car? I want to say that my sharkwerks x pipe 3.4 sounds louder and more gruff than a PSE 3.4. But I can’t comfirm that until I drive the latter.
Sorta, except on the PSE it does pass it through one muffler chamber where "1" is in the orange part of the PSE diagram before going through the X section, resulting in increased suppression over most of the aftermarket ones that don't have any chamber (like the AWE and Soul ones).
I say go for the SC, I have it and love the look of the clock on the dash to be honest, the sport plus setting is also cool when you are doing some (extra) spirited driving.
Sorta, except on the PSE it does pass it through one muffler chamber where "1" is in the orange part of the PSE diagram before going through the X section, resulting in increased suppression over most of the aftermarket ones that don't have any chamber (like the AWE and Soul ones).
Ahh right, I see that. Which perfectly explains why mine sounds a bit louder and more anadultered than PSE, which retains slightly more of a refined sound in comparison.
02-26-2018 | 10:20 AM
