Thanks DRP

 

I know a couple of people were researching this, i.e. coding error on installation of the PSE, anyone have a Durametric pro cable that can answer the question to : what coding are on the engine section for the PSE other then on/off ?

Any word

 

Hey DRP,

Any followup regarding the sound symposer? I'm afraid of doing the retrofit bc I don't like the idea of messing up what I think is a nice sound in the cabin.

Also, would you mind sharing which dealer you use? Porsche of Fairfield is trying to rip me off (over $4,300 plus tax ).

John

 

It's worth every penny for the sports car like 911--PSE is a must have!!

 

I went through Hoffman in Hartford. Ethan in service is exceptional. I actually bought the exhaust at Suncoast and had it shipped. The dealer charges 115% of retail on parts (if that makes any sense).

As for an update: They replaced my symposer. It sounds the same as before they replaced it. They showed me the email from Porsche which explains that the PSE and symposer use the same vacuum line, so your sport exhaust has to be on for the symposer to work, which is why I didn't hear it with the exhaust off. So - if you get PSE retrofitted, no symposer alone. Which is fine by me...just as long as it it's working on full blast

Good luck.
DRP

 

More muted than before without the pse installed?! Are you saying that the sound symposer thingy was louder than with pse on? Sorry but I have know idea what the symposer even was and just alarmed that it would sound "less muted" than with pse. I am in serious love with the pse but if I could go a tad louder I would in a heart beat.

 

I just had a similar install but I have very low mileage since the upgrade. I think what he is saying is that when the sound symposer is added to the PSE it is harder to pick out individually because of how loud the exhaust is. I am not sure how I feel about that. It does make PSE more extreme and gives you the ability to really quiet the car down. Nice if you want to make a phone call.

 

There was a post I read somewhere, where someone measured the PSE levels outside the car. Outside the car the loudness in dB was the same with the PSE button on or off. They found tonal changes but not a change in loudness. I read the Porsche e-mail to state that the symposer in a PSE equipped car is only on when the PSE button is on. So it would make sense that it wil be quieter in the cabin with the button off since the symposer is off. Outside, no difference. The non PSE car has no button so the symposer is always on. This makes the non PSE car louder in the cabin than a PSE car with the PSE button off. Though the PSE car with the button on will be louder in the cabin than the non PSE car.

 

Wow. I don't think I've driven it without PSE on with sport/sport+ active. Maybe I've never heard the symposer!! Guess I have something to try tomorrow!

 

Good info, BUT whoever did that sound test is crazy. I can blast thru tunnels and nearly set car alarms off with PSE activated. It has to be louder in dB.

 

The tone changes would be in frequency and not power. So it is entirely possible to excite a different response from objects due to a change in frequency aka as vibration. A subwoofer and tweeter produce different frequencies yet the subwoofer is what shakes the object. Blow the right amount of air across a reed and it produces a sound. Too much or too less air and there is no sound.

 

Yes, I follow you - I did some grad work in acoustics - that said, I think it's louder. Call it sound power level, sound intensity, ...

 

The symphony under constant or increasing throttle is one thing, the rock festival when lifting or downshifting is something else again.

 

The sound meter is an averaging device. The context of the thread I referenced to was the sound limits imposed at some tracks. The meter reading is all they care about. A power spectrum analyzer would tell the whole story. It may be as simple as adding a little noise to the system to make it louder to your ear. The meter would filter that out. So the net effect of the noise on average power is negligible but you do hear it. If you could turn the engine backwards, maybe a secret message would be played ...