Has anyone found an exhaust solution they absolutely love?
#286
Instructor
This is what makes picking an exhaust so difficult. Watching videos and quoting numbers is no substitute for first hand feedback from owners who have driven with an exhaust extensively, so I greatly appreciate your opinion. FWIW, I don't know if the 2-3 dB increase in sound volume with the unsilenced JCR exhaust over the silenced version is at full throttle, cruise, or both. Hopefully DocMo and Jonny can chime in. A 3 dB increase at full throttle might be perfect, while 3 dB at cruise would probably get tiring quickly.
OEM 718 GT4 EXHAUST (EU) - 91.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE - 94.5dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE - 95.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE - 97.5dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE - 98.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE / JCR INCONEL RACE MANIFOLDS - 107.4dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE / JCR INCONEL RACE MANIFOLDS - 108.1dB
#287
RL Community Team
Rennlist Member
Rennlist Member
Jonny posted actual noise readings in another message. The actual difference at full throttle between the JCR silenced and non-silenced valved exhaust is less than 1 dB. Sorry for posting bad information.
OEM 718 GT4 EXHAUST (EU) - 91.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE - 94.5dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE - 95.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE - 97.5dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE - 98.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE / JCR INCONEL RACE MANIFOLDS - 107.4dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE / JCR INCONEL RACE MANIFOLDS - 108.1dB
OEM 718 GT4 EXHAUST (EU) - 91.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE - 94.5dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE - 95.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE - 97.5dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE - 98.1dB
JCR TITANIUM SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE / JCR INCONEL RACE MANIFOLDS - 107.4dB
JCR TITANIUM NON SILENCED VALVED RACE PIPE / JCR TITANIUM OPF DELETE / JCR INCONEL RACE MANIFOLDS - 108.1dB
I have also said that if you kept the OEM OAP then you may not need the silenced rear section as they do an excellent job of silencing on their own.
Last edited by Westcoast; 04-25-2021 at 09:28 PM.
#288
I should just bite the bullet and buy the JCR race pipe, my car is still 4 months away but if it's a 3 month wait then I should just do it.
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porscheflat6 (04-27-2021)
#289
I guess this system is intended to work with their headers?
https://www.jcr-developments.com/jcr...tted--silenced)
I don't recall seeing this system below discussed, but there are so many available maybe I missed it.
https://www.jcr-developments.com/jcr...pipe-(silenced)
With OE manifolds I wonder if the second link system would offer a relatively drone free (in a spyder) experience that wakes the car up, but isn't crazy loud (like 991 with their race pipe setup). My guess is that it will be very loud despite the small mufflers.
https://www.jcr-developments.com/jcr...tted--silenced)
I don't recall seeing this system below discussed, but there are so many available maybe I missed it.
https://www.jcr-developments.com/jcr...pipe-(silenced)
With OE manifolds I wonder if the second link system would offer a relatively drone free (in a spyder) experience that wakes the car up, but isn't crazy loud (like 991 with their race pipe setup). My guess is that it will be very loud despite the small mufflers.
#290
Order placed. Time to find out what JCR charge for shipping.
Johnny, will you accept payment in Bitcoin by any chance?
Johnny, will you accept payment in Bitcoin by any chance?
Last edited by Reedy; 04-26-2021 at 03:02 AM.
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porscheflat6 (04-27-2021)
#291
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Lots of people buying mufflers from U.S. based companies only to take them off because this car's warmup is louder than our GT3 Cup cars at cold idle.
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neurotic (04-26-2021)
#292
The reason why almost all the YouTube videos out there make the car sound like it's being ball gagged is because of the valves; fix that and the car sounds just peachy
/rant over
#293
are you talking about just disabling the valves or is there a module like Cargraphics that does something further than just removing and plugging the valve control?
100% agree! Honestly all the car only needs is a valve controller unit and maybe an OPF delete pipe. Car is loud enough! I don't need to be heard three quarters of a mile down the street in an open top car. Different story in a proper GT car though lol
The reason why almost all the YouTube videos out there make the car sound like it's being ball gagged is because of the valves; fix that and the car sounds just peachy
/rant over
The reason why almost all the YouTube videos out there make the car sound like it's being ball gagged is because of the valves; fix that and the car sounds just peachy
/rant over
#294
I have the Cargraphic unit set up with my HomeLink buttons so when I press 1, the valves are open 100% of the time; press 2, and it returns to default control. Best of both worlds if you ask me
Last edited by neurotic; 04-26-2021 at 10:03 AM.
#295
I'm waiting on my JCR non-silenced valved exhaust...hopefully finally coming in this week (freaking customs issues), but I'll let you know how it goes. Let me know if anyone wants specific initial impressions or thoughts before/after!
#296
you’re gonna love it. Give it a try with valves connected and disconnected if you want to completely bypass PSE (that’s what I did) for more sound below 4000rpms
#297
RL Community Team
Rennlist Member
Rennlist Member
I guess this system is intended to work with their headers?
https://www.jcr-developments.com/jcr...tted--silenced)
I don't recall seeing this system below discussed, but there are so many available maybe I missed it.
https://www.jcr-developments.com/jcr...pipe-(silenced)
With OE manifolds I wonder if the second link system would offer a relatively drone free (in a spyder) experience that wakes the car up, but isn't crazy loud (like 991 with their race pipe setup). My guess is that it will be very loud despite the small mufflers.
https://www.jcr-developments.com/jcr...tted--silenced)
I don't recall seeing this system below discussed, but there are so many available maybe I missed it.
https://www.jcr-developments.com/jcr...pipe-(silenced)
With OE manifolds I wonder if the second link system would offer a relatively drone free (in a spyder) experience that wakes the car up, but isn't crazy loud (like 991 with their race pipe setup). My guess is that it will be very loud despite the small mufflers.
#298
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The " )" was missing from the link.. They're all on there at the following link below
https://www.jcr-developments.com/por...-spyder-gts4.0
JC
https://www.jcr-developments.com/por...-spyder-gts4.0
JC
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The following 2 users liked this post by JCR-Porsche:
porscheflat6 (04-27-2021),
Westcoast (04-26-2021)
#299
Instructor
#300
Instructor
The following users liked this post:
porscheflat6 (04-27-2021)