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I am wondering if the design of the PSE allows for more road noise into the cabin. Does anybody know about this? I wonder of they have to remove sound insulation to allow exhaust note into the cabin.
I love a good exhaust/engine note, but the road noise in the cabin is a bit much. If leaving PSE off the build helps with road noise, I might do that.
There are quite a few videos comparing PSE to standard. Those may help you.
Also there's a sound enhancement tube that ducts intake sound into the cabin, there's discussion on whether it's desirable as well as ways to muffle it.
I ordered mine with PSE, I have another vehicle to use when I want quiet. Lucky I guess.
Not sure whether you are referring to .1 or .2 models but on the 911's there is a Sound Symposer installed that is a tube from the engine compartment to the back area under your rear window which allows sound into the cabin.
Had it on my 991.1 4S (with PSE) and with an after market Kline exhaust I found it very annoying. I had my dealer cap both ends and I put padding around the rear window area to eliminate as much of that effect as possible. I want to hear exhaust but naturally through the outside of the car.
Other than the symposer there is no less sound deadening material on PSE cars.
Thanks above, and the sound symposia is my reference. I current have PSE on my 991.2, but does that tube allow more road noise in? If no, then I'll order it again.
I only notice the sound symposer when I lift the throttle at higher speeds, a low drone fills the cabin. Suprisingly, my 2019 GTS has very little road noise. Way less than the 4 911s I test drove a few months ago. I have no idea why, but I am happy about it.
PSE take up no more room than stock exhaust....no less sound deading on the car. The road noise you hear is from the large rear tires and a stiff chassis suspension. Typical,in all types of real sports cars. No way around it.
however if you just want a louder exhaust go after market and save money over PSE unless you like the ability to switch exhaust sounds. Personally I find the normal mode of PSE to be dull and way to quiet and PSE in sport mode to be just ok...normal needs to be the sport sound and sport needs to be much more aggressive. PSE to me is very dull and tame
The presence of the sound symposer has nothing to do with the PSE, it is there on all of the cars and opens/closes depending upon the Sport mode setting. In the 911.1 there was one symposer port into the cabin, in the 991.2 there are two.
The tubes from the symposer connect directly to the intake manifold with a membrane in the tube that allows intake sound to come through (while preventing any air flow into the intake itself).
On a 991.2, when PSE is on it allows for a deeper tone, it's very obvious even at idle. Overall the volume isn't that much louder (on a 991.2 again) but the tone is much better. I cannot recommend skipping the PSE.
PSE take up no more room than stock exhaust....no less sound deading on the car. The road noise you hear is from the large rear tires and a stiff chassis suspension. Typical,in all types of real sports cars. No way around it.
however if you just want a louder exhaust go after market and save money over PSE unless you like the ability to switch exhaust sounds. Personally I find the normal mode of PSE to be dull and way to quiet and PSE in sport mode to be just ok...normal needs to be the sport sound and sport needs to be much more aggressive. PSE to me is very dull and tame
Okay, thanks for that. I guess the above comments settles that question for me, so thanks all.
My 19 inch rims came with Goodyears and they were hellaciously loud. A switch to Michelins made it better, but now that they have close to 16k on them the road noise seems louder. I dont like it drowning out the engine and exhaust notes on bad surfaces. It is much worse in the Southeast - I think they use harder macadam due to the heat?
Right now I am in Greenville with the car at a manufacturing conference. I passed a Lotus dealership this morning - going to drop in and look at an Evora 400. Gotta keep those options open.
The road noise you hear is from the large rear tires and a stiff chassis suspension.
Word.
Originally Posted by Dan Nagy
but now that they have close to 16k on them the road noise seems louder.
Yes, our tires start getting really loud at about 15K, for those of us that actually put highway miles on, too. When you can't here your blinkers blink any more, it about time to change tires, if you want the most quiet ride restored. Keep in mind, there's still some very good traction and milegae beyond this point. But if you want the most quiet ride possible, you need to change tires sooner than later.
I am wondering if the design of the PSE allows for more road noise into the cabin. Does anybody know about this? I wonder of they have to remove sound insulation to allow exhaust note into the cabin.
I love a good exhaust/engine note, but the road noise in the cabin is a bit much. If leaving PSE off the build helps with road noise, I might do that.
BTW: I found it’s not necessary to plug the hose in the engine bay. Plugging the opening to the symposer hose opening in the rear cab behind the back seats is sufficient. I also added Soundskins (sound deadening material) on the door panels and behind the rear tire’s wheel liners.
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PSE Question
any more, it about time to change tires, if you want the most quiet ride restored. Keep in mind, there's still some very good traction and milegae beyond this point. But if you want the most quiet ride possible, you need to change tires sooner than later.
