Carpokes Porsche Forum

Arne2 wrote: Mon Aug 14, 2023 2:21 pm

Tom wrote: Wed Jun 21, 2023 7:02 pm ...you'd need at least the exhaust with vacuum operated PSE flaps and the electronic solenoid that controls them, plus the vacuum hoses. Normally, an ECU controls the solenoid based (mostly) on the position of the switch inside, but a simple switch similar (but not identical) to the one in this thread could/would substitute for the ECU. Always Loud is super easy because the flaps open when power is cut to the solenoid.

So if I install a used PSE system, with the factory solenoid, but don't send it any power, the flaps will be always open? That could be a good stop-gap or interim solution, given that the the 4-cyl PSE is not supposed to be all that loud. Probably still quieter than most aftermarket exhausts.

Yes. Up until the 992, all you need to do to make it loud 100% of the time is pull the electrical connector off the solenoid. With the 992, they changed the system to trigger a CEL if the servo position doesn't move to where the ECU wants it.

Hi Tom,

Is there something similar to the 718 for a 911 turbo S 991.2?

Thanks,
Michael

My11 wrote: Thu Jun 19, 2025 1:47 pm Hi Tom,

Is there something similar to the 718 for a 911 turbo S 991.2?

Thanks,
Michael

I've never done one for that car, per se, but would be willing to bet the system is the same as the 991 GT3 and 981 cars. If so, the switch would be wired exactly the same as in the DIY link below, except it uses old-school Junior Timer connectors instead of the connectors shown in this DIY:

viewtopic.php?t=2965

Porsche switched the pins around between the 981 and GT3, so we'd need to check to see which pin is which in the turbo connector. That's easy enough to do with a multimeter -- just check to see which side of the connectors is always grounded and which one jumps to battery voltage when the exhaust is supposed to be quiet. If you are interested in pursuing it, I could walk you through the process.