Has anyone found an exhaust solution they absolutely love?
04-26-2021, 03:00 PM
#301
Burning Brakes
It's not too much; I had a quote a while ago but because the new superlight pipe came out I couldn't decide which one to get. Ended up getting wheels instead; I already knew which ones I wanted
04-26-2021, 03:58 PM
#303
Yes there is a very mild drone between 2k and 3k, I notice it when driving on the highway with top closed. When I open the top it disappears. If you are very sensitive to drone or it’s your daily driver go with the silenced race exhaust.
04-26-2021, 04:48 PM
#304
RL Community Team
Rennlist Member
Rennlist Member
Doc, you are still running OEM GPF right?
04-26-2021, 06:11 PM
#305
Instructor
Do you get the drone with the OEM valve controller, or valves disconnected?
04-26-2021, 08:28 PM
#306
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porscheflat6 (04-28-2021)
04-26-2021, 08:32 PM
#307
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
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porscheflat6 (04-28-2021)
04-26-2021, 10:39 PM
#308
Three Wheelin'
It seems like a resonated OAP would solve a lot of folks issues, and or persuade more people to make the jump into buying something. I know JCR has one, but due to the weak dollar it is expensive. With it, you can stay modular and just replace the inefficient restrictive GPF with a totally free flowing resonator. Free up the motor, increase responsiveness, add a few horsepower???, and add a little more flat-six sound without going overboard. I am sure there are a lot of people lurking here, but not necessarily making comments.
Porsche designed their two pathway exhaust with sound attenuation built into the PSE side with the GPF. It is no wonder that when you remove the GPF and not replace it with something else, that it becomes a bit too loud and or has an increase in drone. Don't get me wrong, I firmly believe the GPF needs to go. The question is, but in what manner. With a standard OAP, the exhaust goes through the cat and then straight pipe out. Yes there is a secondary muffled pathway, but what motivation do the exhaust gases have to pass through that narrow restrictive muffler when the primary exit is only a foot of larger pipe. So the vast majority of the exhaust flow bypasses the muffler and exists the car without any x-pipe mixing or sound attenuation.
A resonated OAP would free up the motor, provide some sound muffling, and maybe work better with some of the rear sections provided by some of our vendors on this site.
Porsche designed their two pathway exhaust with sound attenuation built into the PSE side with the GPF. It is no wonder that when you remove the GPF and not replace it with something else, that it becomes a bit too loud and or has an increase in drone. Don't get me wrong, I firmly believe the GPF needs to go. The question is, but in what manner. With a standard OAP, the exhaust goes through the cat and then straight pipe out. Yes there is a secondary muffled pathway, but what motivation do the exhaust gases have to pass through that narrow restrictive muffler when the primary exit is only a foot of larger pipe. So the vast majority of the exhaust flow bypasses the muffler and exists the car without any x-pipe mixing or sound attenuation.
A resonated OAP would free up the motor, provide some sound muffling, and maybe work better with some of the rear sections provided by some of our vendors on this site.
The following 2 users liked this post by lovetoturn:
porscheflat6 (04-27-2021),
tigerhonaker (04-27-2021)
04-26-2021, 11:00 PM
#309
04-26-2021, 11:00 PM
#310
Rennlist Member
ugh
Last edited by UncleDude; 04-27-2021 at 09:36 PM. Reason: Ugh, code link posted
04-26-2021, 11:08 PM
#311
with valves disconnected, drone is slightly more present but not tiring. You can easily drive 3 hours on the highway without issues. Once you drop the top, drone disappears.
I can daily drive both settings without issue.
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dnimi123 (04-27-2021)
04-26-2021, 11:47 PM
#313
Burning Brakes
Originally Posted by ltfl09
Kline has no drone and it's loud - mine is going on next Thursday. I'm pairing mine with a soul valve controller. I did hear the Dundon on Youtube and my god that thing sounds sick.
04-27-2021, 12:49 AM
#314
Rennlist Member
It seems like a resonated OAP would solve a lot of folks issues, and or persuade more people to make the jump into buying something. I know JCR has one, but due to the weak dollar it is expensive. With it, you can stay modular and just replace the inefficient restrictive GPF with a totally free flowing resonator. Free up the motor, increase responsiveness, add a few horsepower???, and add a little more flat-six sound without going overboard. I am sure there are a lot of people lurking here, but not necessarily making comments.
Porsche designed their two pathway exhaust with sound attenuation built into the PSE side with the GPF. It is no wonder that when you remove the GPF and not replace it with something else, that it becomes a bit too loud and or has an increase in drone. Don't get me wrong, I firmly believe the GPF needs to go. The question is, but in what manner. With a standard OAP, the exhaust goes through the cat and then straight pipe out. Yes there is a secondary muffled pathway, but what motivation do the exhaust gases have to pass through that narrow restrictive muffler when the primary exit is only a foot of larger pipe. So the vast majority of the exhaust flow bypasses the muffler and exists the car without any x-pipe mixing or sound attenuation.
A resonated OAP would free up the motor, provide some sound muffling, and maybe work better with some of the rear sections provided by some of our vendors on this site.
Porsche designed their two pathway exhaust with sound attenuation built into the PSE side with the GPF. It is no wonder that when you remove the GPF and not replace it with something else, that it becomes a bit too loud and or has an increase in drone. Don't get me wrong, I firmly believe the GPF needs to go. The question is, but in what manner. With a standard OAP, the exhaust goes through the cat and then straight pipe out. Yes there is a secondary muffled pathway, but what motivation do the exhaust gases have to pass through that narrow restrictive muffler when the primary exit is only a foot of larger pipe. So the vast majority of the exhaust flow bypasses the muffler and exists the car without any x-pipe mixing or sound attenuation.
A resonated OAP would free up the motor, provide some sound muffling, and maybe work better with some of the rear sections provided by some of our vendors on this site.
04-27-2021, 01:52 AM
#315
Rennlist Member
My Kline Inconel (OAP/Rear) comes in at the end of may. That should be the cherry on top after DSC/TPC set up for street. The car will then be what it should have been from the factory.