997.2 PSE question
Thread Starter
Racer
Joined: Apr 2007
Posts: 392
Likes: 63
997.2 PSE question
Hey guys,
I've tried searching all the way back to threads from 2014 but can't seem to find the answer to this. For 997.2 PSE, is it just on/off via the button or does PSE also open the valve under other conditions (even with PSE off) such as sport mode, sport +, above a certain RPM, or a combination of.
Thanks
I've tried searching all the way back to threads from 2014 but can't seem to find the answer to this. For 997.2 PSE, is it just on/off via the button or does PSE also open the valve under other conditions (even with PSE off) such as sport mode, sport +, above a certain RPM, or a combination of.
Thanks
Instructor
Joined: Jun 2018
Posts: 126
Likes: 11
From: Portland
The way I understand it is:
PSE off: valves stay shut but may open at high rev range.
PSE on: Valves blip open at startup but then close again at idle, they then reopen at around 4k .
I have PSE but have disabled it so the valves are always open at every rev range. I'm sure I'll be pulled over at some point due to the revised CA exhaust law
PSE off: valves stay shut but may open at high rev range.
PSE on: Valves blip open at startup but then close again at idle, they then reopen at around 4k .
I have PSE but have disabled it so the valves are always open at every rev range. I'm sure I'll be pulled over at some point due to the revised CA exhaust law
Thread Starter
Racer
Joined: Apr 2007
Posts: 392
Likes: 63
I have PSE + SW bypass. Exhaust volume is far too low to be pulled over so I think you're fine.
Regarding PSE off & opening at a higher RPM, that was my suspicion. The reason I'm asking is I'm thinking about converting to a GT3 center muffler and use the existing PSE vacuum line to control the valves for the 2 inlets. It will be custom so fitment isn't an issue
Regarding PSE off & opening at a higher RPM, that was my suspicion. The reason I'm asking is I'm thinking about converting to a GT3 center muffler and use the existing PSE vacuum line to control the valves for the 2 inlets. It will be custom so fitment isn't an issue
Rennlist Member
Joined: Nov 2004
Posts: 4,413
Likes: 149
From: Prospect, KY
That was my impression as well. I get the slightest burble on decel at around 3k rpms but you have to try hard to hear it and that's with PSE on and a center bypass. I wish there was more burble.
Instructor
Joined: Jun 2018
Posts: 126
Likes: 11
From: Portland
you get more burble.
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Racer
Joined: May 2018
Posts: 347
Likes: 60
From: Golden, CO
I'm not totally certain about when it is open and closed, but I did at one point discover that it you put the car in neutral and release the clutch, it closes the PSE valves. It does seem a little quieter in speeds from 19-48mph, but does not sound totally closed.
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Rennlist Member
Rennlist Member
Joined: Oct 2007
Posts: 28,608
Likes: 8,394
From: Clemson, SC
If you want more sound, switch to an aftermarket exhaust that has the valved operation, and tie it into the PSE control system. That's what I have on my .1 with Fabspeed Valvetronic exhaust and it's awesome.
Instructor
Joined: Oct 2017
Posts: 111
Likes: 10
I have PSE + SW bypass. Exhaust volume is far too low to be pulled over so I think you're fine.
Regarding PSE off & opening at a higher RPM, that was my suspicion. The reason I'm asking is I'm thinking about converting to a GT3 center muffler and use the existing PSE vacuum line to control the valves for the 2 inlets. It will be custom so fitment isn't an issue
Regarding PSE off & opening at a higher RPM, that was my suspicion. The reason I'm asking is I'm thinking about converting to a GT3 center muffler and use the existing PSE vacuum line to control the valves for the 2 inlets. It will be custom so fitment isn't an issue
Thread Starter
Racer
Joined: Apr 2007
Posts: 392
Likes: 63