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Has anyone made an electronic cut out to bypass the muffler on a 2.7L 981 Cayman?
I don't really feel like spending $3k on an exhaust when the muffler delete honestly sounds pretty good. I've seen a few companies sell cut out kits for the 987, but none for the 981.
If you search this forum, you will find lots of threads on this topic, from Stock Exhaust Gutted Mufflers to Bypass Systems similar to what's shown above.
Lots of information here at Rennlist!! Merry Christmas.
If you search this forum, you will find lots of threads on this topic, from Stock Exhaust Gutted Mufflers to Bypass Systems similar to what's shown above.
Lots of information here at Rennlist!! Merry Christmas.
Merry Christmas to you as well. Could you point me towards the lots of threads about muffler bypasses on the 981? When I google search I find a few threads about the 991, people talking about it (but not actually doing it) on the 981, the above posters thread, and this thread right here. Not really seeing a ton of people doing this.
Honestly just want to find a part number similar to what the other guy is using.
It looks like the exact same turn down setup that were on my old Fabspeed TracTeK exhaust. There are parts numbers on the valves, but I cant make them out well enough when magnified
Sorry for the delay in getting back to this thread! I used parts from Ali Express - cheap! The valves and pipes/extensions are in 1 kit and are the closed valves 63MM - (proper size for our exhaust and the valves are closed when not "powered" meaning when you start the car it is normal (quiet) mode). The same seller has the control unit. You need 2 valve setups and 1 control unit. I think all of the parts were around $100.
The Fabspeed Tracktec setup mentioned in this thread was the inspiration for my project; i wanted to be sure I had no drone which is why I used the stock muffler and then wanted wild, wide open sound when at the track. My system accomplished just that - stock, drone-less sound and awesome sounding wide open sound. Fabspeed uses different valves that look to be a bit more robust but I have run my system for 2 years and have had zero problems.
The only videos I have are from inside the car from a track day recorded by my Garmin Catalyst for the modified version and from a GoPro for the unmodified but it will be a pretty accurate comparison.
Thats a sweet deal on those parts! My car is factory PSE which means its not a simple on/off for the valves like using an aftermarket setup. The PSE logic is to open the valves when the car is under a certain load vs throttle pedal position whether you have PSE turned on or not, so this means the Fabspeed setup would open in normal street driving when passing someone, or any other reason that would load the car up. It would sound like a dump truck on the street with valves open and was embarrassing to drive.
I bypassed the factory PSE valve and installed the included Fabspeed remote setup which is essentially the same setup in your link to stop this and make it truly on/off with the remote, however I had to remember to use the remote to turn things off before every start or else it would shake the walls in my garage since the default was open valves.
In the end, the Fabspeed was removed and the PSE that should have never been removed placed back on. This was my fault, as the Fabspeed version is called "TrackTec" for a reason, so if you're not planning on using this on the track then dont do it! The sound is just too obnoxious for any street driving IMO. At WOT high RPM it sounds great, but street driving RPM sounded like a dump truck on my car, or a car with a rusted out muffler. Certainly not the signature high pitched Porsche wail sound that the flat 6 is known for
Where did you stick the vacuum hoses and how did you power the unit for the remote? Brought it by the exhaust shop the other day and that's what they asked me.
There is a fuse panel behind the pullout carpet side panel in the right rear of the hatch. I used a fuse tap and found one that was on switched power for the remote receiver box, and then left the RX box in the fuse area behind the carpet cover. It also makes it easy to route the power plug to the solenoid under the engine cover and carpet and hide it under the trim pieces that need to be removed in order to remove the engine cover. The factory PSE solenoid is mounted on top of the engine on the passenger side.
My factory PSE vacuum lines were already there, and run down from the solenoid along the back side of the bumper area where there were little clips to hold the vacuum lines along the silver heat shield material. Im not sure if non PSE cars have these clips back there, but its no big deal to just zip tie them along the path to the muffler valves out of the way so they aren't laying across the hot exhaust
Attached is the Soul instructions for installation for non PSE cars, so maybe that will give you a better idea of how its done
12-22-2022, 04:56 PM
Electronic Cut Outs to By-Pass Muffler
