PSE Valve - How does it work?

[Costa]

Does anyone (Loren) know how the actual bypass valve on the PSE works.

I am getting a PSE fitted (dealer to fit) to my new 996 next week on delivery of the vehicle and was curious as to how the valve function works.

Obviously the switch on the dash operates electrically, but I have read that there are some vacuum conections to the exhaust as well?

I assume due to the proximity of the heat etc. that the valve on the muffler is actually not an electrical device but maybe a vacuum operated device?

TIA

Costas - From DownUnder.....

[Loren]

The PSE vacuum operated valves are normally open. That is, they are loud by default. The vacuum operated valves are actuated by either the switch or the Speedometer A signal (which triggers them at 30-40 MPH) switching a solenoid. The electronic solenoid in the engine compartment switches and applies the vacuum or vents. The lines that run to the very hot exhaust area are stainless steel braided lines so heat should not hurt them.

I personally chose to not install the vacuum lines and electronics and leave the exhaust open all the time. (That will save you about 8 hours of labor!). And, I don't think it is too loud open all the time :D :D :D

[Costa]

Thanks Loren... :)

I suspected that a solenoid was used to switch the vacuum lines - but was not 100% sure on it - thanks

Costas