992 GT3 on "quiet" tracks...
05-17-2022, 05:48 PM
#16
Rennlist Member
Thread Starter
So... they are louder than 991 GT3's. We has two new 992 GT3's on track and both in break in so no shifting past 7K and both busted sound. I was short shifting by the sound guy and still managed to hit 92.4db and the other guy who was a bit more aggressive with the right pedal hit 97.5db at the same spot.
Clear day, not humid...so a high ceiling.
This isn't looking good for stock 992 GT3's at LCMT.
I had a Dundon quiet muffler on my 991 and have their adapters coming to mount it on the 992 along with the N-ring tips i also had.
Also will be working on a bolt on solution for next week's event to hopefully help some locals pass.
Clear day, not humid...so a high ceiling.
This isn't looking good for stock 992 GT3's at LCMT.
I had a Dundon quiet muffler on my 991 and have their adapters coming to mount it on the 992 along with the N-ring tips i also had.
Also will be working on a bolt on solution for next week's event to hopefully help some locals pass.
05-17-2022, 05:50 PM
#17
Rennlist Member
Thread Starter
And it seems like we're not getting closer to a solution with the new valve setup on the 992. I wonder if restricting the exhaust enough to pass sound restrictions does affect the way these motors run? I remember when Josh Golden was running a supertrapp sweep contraption on his GT3 Paul Savvedra (who was running the shop at MONTEREY PORSCHE at the time) told me the car never ran right at laguna with the exhaust restricted that much. He always thought restricting the GT3 exhaust for more than a short period at high RPMs wasn't good. I know that Dundon claims no power loss with their quiet but I've never talked to anyone who actually run that muffler long term. The problem is probably economics everyone wants a louder exhaust not something that will run 90db at 9K.
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RDCR (05-17-2022)
05-17-2022, 05:53 PM
#18
Everyone wants the loudest muffler until they lose their hearing or can't drive at a track 😅
05-18-2022, 08:01 AM
#19
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Thread Starter
It's funny how people are still saying that the 992's aren't as loud as the 991's....The first time the valves were open and i was at WOT past 6K i knew it was loud. So much for the particulate filters making them sound like a camry lol.
05-20-2022, 09:03 AM
#20
Rennlist Member
Thread Starter
Ok so thank you to Ted and Jamie for sending out (quickly) the adapters to install the Dundon Quiet muffler off my 991 on the 992. I will get that on today and then monday will be the test to see if it passes....
I will keep you posted.
I will keep you posted.
05-26-2022, 08:43 AM
#22
Rennlist Member
Thread Starter
Good news (mostly)! Of the about 10 sessions I was on track, only one did i bust sound. Most of my runs were in the 90db range with the one exception at 93.1db...not sure what happened there but I did push a little harder that time since there was very little traffic.
That said, the Dundon quiet + adapters for 992 plus N-Ring turndown's do work to reduce the volume.
There were about 6 new GT3's there at the event and almost all busted sound (manual and PDK alike)
A little video of the car on track (iphone video). Sound isn't great but...
That said, the Dundon quiet + adapters for 992 plus N-Ring turndown's do work to reduce the volume.
There were about 6 new GT3's there at the event and almost all busted sound (manual and PDK alike)
A little video of the car on track (iphone video). Sound isn't great but...
05-26-2022, 02:01 PM
#23
Rennlist Member
Good news (mostly)! Of the about 10 sessions I was on track, only one did i bust sound. Most of my runs were in the 90db range with the one exception at 93.1db...not sure what happened there but I did push a little harder that time since there was very little traffic.
That said, the Dundon quiet + adapters for 992 plus N-Ring turndown's do work to reduce the volume.
There were about 6 new GT3's there at the event and almost all busted sound (manual and PDK alike)
A little video of the car on track (iphone video). Sound isn't great but...
https://youtu.be/vuwBpE20kn4
That said, the Dundon quiet + adapters for 992 plus N-Ring turndown's do work to reduce the volume.
There were about 6 new GT3's there at the event and almost all busted sound (manual and PDK alike)
A little video of the car on track (iphone video). Sound isn't great but...
https://youtu.be/vuwBpE20kn4
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Yargk (06-01-2022)
06-01-2022, 01:46 AM
#28
Instructor
102.3db @ Laguna Seca on a clear day
Just came back from a track day yesterday at Laguna (on a 103db day) where I asked them to give me a sound check. Measured over 3 laps on a clear day, they clocked me at 102.3db. Stock 992 GT3 w/PDK.
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Yargk (06-01-2022)
06-05-2022, 07:56 PM
#29
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No drone with the cat back system Chris has with a quiet muffler... valves are still apart of the kit!
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Dundon Motorsports
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Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.dundonmotorsports.com
Facebook.com/dundonmotorsports
Instagram @dundon_motorsports
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Chris R. (06-06-2022)
