JCR exhaust arrived
02-11-2021, 03:03 PM
#31
Burning Brakes
I have auditioned that clip a few times and again just now, I think it can be considered as representative of the changes in sound that you would experience by adding just the JCR rear section, I think what is important to take from this is the change in the characteristic of the sound more than anything else. Sonic memory is at play here for me, when I listen to these clips I remember what mine sound like and realize that the video is falling short of the real world sound. I can hear both the JCR sound and OEM sound in each sound bite and they do come out close but compressed.
I would say that this clip gives a vey good indication of what to expect but understand that in reality the JCR system it has more impact then comes across here, the other thing I do like is how Damian presented this was to throttle the engine in a very similar way, given' her the beans the same way, I have watched video from the other manufacturers and don't recall they tried to keep this the same.
Another thing I might mention is it depends on what you as the owner is looking for, you may or may not want such a boisterous exhaust note and prefer to maintain a more stealthy sound, everybody is slightly different. I have had a number of NA flat-6 engine cars so I knew what I thought that I should be hearing from this 4.0l 400+ HP engine and it just wasn't there, IMHO the exhaust sound was being muddied up by the OEM system, the JCR Valved Silenced Race pipe answered the call for a clean more characteristic flat-6 exhaust sound.
I would say that this clip gives a vey good indication of what to expect but understand that in reality the JCR system it has more impact then comes across here, the other thing I do like is how Damian presented this was to throttle the engine in a very similar way, given' her the beans the same way, I have watched video from the other manufacturers and don't recall they tried to keep this the same.
Another thing I might mention is it depends on what you as the owner is looking for, you may or may not want such a boisterous exhaust note and prefer to maintain a more stealthy sound, everybody is slightly different. I have had a number of NA flat-6 engine cars so I knew what I thought that I should be hearing from this 4.0l 400+ HP engine and it just wasn't there, IMHO the exhaust sound was being muddied up by the OEM system, the JCR Valved Silenced Race pipe answered the call for a clean more characteristic flat-6 exhaust sound.
Good to hear about this. Your description of what JCR exhaust sounds like appears to be what I am after. Thanks.
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Westcoast (02-11-2021)
02-11-2021, 03:04 PM
#32
RL Community Team
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This clip is also very good at what you can expect from just the JCR rear section and OEM GPF's in place:
Another exhaust sound data point - Page 52 - Rennlist - Porsche Discussion Forums
Another exhaust sound data point - Page 52 - Rennlist - Porsche Discussion Forums
Last edited by Westcoast; 02-11-2021 at 03:05 PM.
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02-11-2021, 03:17 PM
#33
I have auditioned that clip a few times and again just now, I think it can be considered as representative of the changes in sound that you would experience by adding just the JCR rear section, I think what is important to take from this is the change in the characteristic of the sound more than anything else. Sonic memory is at play here for me, when I listen to these clips I remember what mine sound like and realize that the video is falling short of the real world sound. I can hear both the JCR sound and OEM sound in each sound bite and they do come out close but compressed.
I would say that this clip gives a vey good indication of what to expect but understand that in reality the JCR system it has more impact then comes across here, the other thing I do like is how Damian presented this was to throttle the engine in a very similar way, given' her the beans the same way, I have watched video from the other manufacturers and don't recall they tried to keep this the same.
Another thing I might mention is it depends on what you as the owner is looking for, you may or may not want such a boisterous exhaust note and prefer to maintain a more stealthy sound, everybody is slightly different. I have had a number of NA flat-6 engine cars so I knew what I thought that I should be hearing from this 4.0l 400+ HP engine and it just wasn't there, IMHO the exhaust sound was being muddied up by the OEM system, the JCR Valved Silenced Race pipe answered the call for a clean more characteristic flat-6 exhaust sound.
I would say that this clip gives a vey good indication of what to expect but understand that in reality the JCR system it has more impact then comes across here, the other thing I do like is how Damian presented this was to throttle the engine in a very similar way, given' her the beans the same way, I have watched video from the other manufacturers and don't recall they tried to keep this the same.
Another thing I might mention is it depends on what you as the owner is looking for, you may or may not want such a boisterous exhaust note and prefer to maintain a more stealthy sound, everybody is slightly different. I have had a number of NA flat-6 engine cars so I knew what I thought that I should be hearing from this 4.0l 400+ HP engine and it just wasn't there, IMHO the exhaust sound was being muddied up by the OEM system, the JCR Valved Silenced Race pipe answered the call for a clean more characteristic flat-6 exhaust sound.
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Westcoast (02-11-2021)
02-11-2021, 03:26 PM
#34
the sound seems perfect to me. go to 15mn30 and at the end. this is a non silenced version. I will leave the particulate filter and install the rear silencer. I will add a valve controller and I think it will be perfect!
02-11-2021, 03:47 PM
#35
Non silenced version
the sound seems perfect to me. go to 15mn30 and at the end. this is a non silenced version. I will leave the particulate filter and install the rear silencer. I will add a valve controller and I think it will be perfect!
the sound seems perfect to me. go to 15mn30 and at the end. this is a non silenced version. I will leave the particulate filter and install the rear silencer. I will add a valve controller and I think it will be perfect!
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Krizze (03-27-2021)
02-11-2021, 03:49 PM
#36
Regarding you starting point, that is where my journey began, the JCR Valved Silenced Race Pipe with stock OAP. My take on that combination, nearly perfect and I dare say more perfect then it is now with the Akra link-pipe, it had the beautiful x-pipe sound, clearly a performance flat-6 exhaust note and virtually no drone. So you might ask what was it lacking(?), maybe just a bit bit more volume, intensity and lower frequencies, IMHO the GPF matrix in the OEM pipes are very effective as a silencer.
Since we all have different tastes I agree that a great starting point would be the exhaust/silencer as it changes the sound through design and can include mixing as in the case of the JCR system, where as the GPF delete mainly only makes it louder, and that maybe too much for some.
Since we all have different tastes I agree that a great starting point would be the exhaust/silencer as it changes the sound through design and can include mixing as in the case of the JCR system, where as the GPF delete mainly only makes it louder, and that maybe too much for some.
Thanks for sharing all the pearla of what you have learned in this thread.
I noticed JCR now has silenced opf delete pipes on their website. Do you think paring this with the silenced race exhaust will give the perfect sound quality and intensity while still preserving little to no drone?
I also wonder how that combo would sound compared to just the non-silenced race exhaust alone. Maybe JCR has some more information or sound clips soon.
02-11-2021, 03:50 PM
#37
Burning Brakes
According to JC from JCR, if you were to change out the OEM headers to race headers, then the next most restrictive point would be the OAP, and not the rear mufflers. Thus the deletion of the OAP would net some meaningful HP gains (don't know the exact figures) when paired with the race headers. OAP alone would not add much, as the OEM headers are the most restrictive components.
02-11-2021, 03:59 PM
#38
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Really great discussion, as mentioned it’s tricky to capture the sound accurately on video
We tend to always advise to first go with the rear and build from there based on your own experience. Be it non silenced or silenced.
We worked really hard to develop our rear options together with the factory PSE and I feel leaving the valves to operate as intended which is in line with our development does yield the best results overall.
For those looking for more, more of the time, we have our non valved systems coming but realistically these offerings will be aimed squarely at those who wish to achieve maximum weight savings and accept a level of sound which some might not be fully satisfied with on a daily basis
Thanks again for taking the time to share your real world experiences
JC
We tend to always advise to first go with the rear and build from there based on your own experience. Be it non silenced or silenced.
We worked really hard to develop our rear options together with the factory PSE and I feel leaving the valves to operate as intended which is in line with our development does yield the best results overall.
For those looking for more, more of the time, we have our non valved systems coming but realistically these offerings will be aimed squarely at those who wish to achieve maximum weight savings and accept a level of sound which some might not be fully satisfied with on a daily basis
Thanks again for taking the time to share your real world experiences
JC
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02-11-2021, 04:57 PM
#39
RL Community Team
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Regarding you starting point, that is where my journey began, the JCR Valved Silenced Race Pipe with stock OAP. My take on that combination, nearly perfect and I dare say more perfect then it is now with the Akra link-pipe, it had the beautiful x-pipe sound, clearly a performance flat-6 exhaust note and virtually no drone. So you might ask what was it lacking(?), maybe just a bit bit more volume, intensity and lower frequencies, IMHO the GPF matrix in the OEM pipes are very effective as a silencer.
Since we all have different tastes I agree that a great starting point would be the exhaust/silencer as it changes the sound through design and can include mixing as in the case of the JCR system, where as the GPF delete mainly only makes it louder, and that maybe too much for some.
Since we all have different tastes I agree that a great starting point would be the exhaust/silencer as it changes the sound through design and can include mixing as in the case of the JCR system, where as the GPF delete mainly only makes it louder, and that maybe too much for some.
Thanks for sharing all the pearla of what you have learned in this thread.
I noticed JCR now has silenced opf delete pipes on their website. Do you think paring this with the silenced race exhaust will give the perfect sound quality and intensity while still preserving little to no drone?
I also wonder how that combo would sound compared to just the non-silenced race exhaust alone. Maybe JCR has some more information or sound clips soon.
I noticed JCR now has silenced opf delete pipes on their website. Do you think paring this with the silenced race exhaust will give the perfect sound quality and intensity while still preserving little to no drone?
I also wonder how that combo would sound compared to just the non-silenced race exhaust alone. Maybe JCR has some more information or sound clips soon.
Yes I saw the JCR silenced OPF pipes and it is this statement that is most interesting to me:
This means you benefit from the HP and TQ increase but with only a subtle bump in overall volume vs the factory OPF pipes
As Jonny said, they designed the rear section to work with the OEM OPF pipes and I would say that most people would find this the best balance on the street and only those looking for a significant step up in volume and intensity would then go further and remove the OEM OPF.
Last edited by Westcoast; 02-11-2021 at 07:38 PM.
02-11-2021, 07:31 PM
#41
Burning Brakes
Enjoy hearing everyones comments on a great exhaust that promotes the flat-six sound we are all are sorta missing from the OEM exhaust offering. It also seems like the GPF, although not desirable for many reasons, offers some sound and drone attenuation. This appears to be necessary for most folks to be the happy with their rear section upgrades.
That begs the question for someone to make a resonated OAP. We can have some drone reduction and calm down the overall volume as well. For those still using the OEM rear muffler, you would at least have some sound damping in the direct pathway when hitting the PSE button. Otherwise it is straight out with the deletion of the GPF. If a couple of manufacturers can put a cat back there, why not a resonator. The added cost would not be that high either.
Some say the GPF makes power and others say it does not. In either case, I would like it gone. Don't need the extra weight, the heat containment, nor the reduced throttle response. There is no way that pile of broken up ceramic as seen in the dummy delete thread is good for the performance of our motors. It looks so solid with more matrix than air passages. I know from expericne that going from an OEM ceramic cat to a 200-cell HJS cat opens up the exhaust significantly. More dyno documented power and better throttle response. So now having two of these ceramic honey comb devices in our exhaust pathways doesn't seem like progress, but rather regulation driven digression.
Just my opinion, but sport headers with good quality HJS cats and a resonated OAP would be a great option to have. You can then mate it to whatever rear section you so chose, with the x-pipe versions such as Johnny's likely yielding the best results.
That begs the question for someone to make a resonated OAP. We can have some drone reduction and calm down the overall volume as well. For those still using the OEM rear muffler, you would at least have some sound damping in the direct pathway when hitting the PSE button. Otherwise it is straight out with the deletion of the GPF. If a couple of manufacturers can put a cat back there, why not a resonator. The added cost would not be that high either.
Some say the GPF makes power and others say it does not. In either case, I would like it gone. Don't need the extra weight, the heat containment, nor the reduced throttle response. There is no way that pile of broken up ceramic as seen in the dummy delete thread is good for the performance of our motors. It looks so solid with more matrix than air passages. I know from expericne that going from an OEM ceramic cat to a 200-cell HJS cat opens up the exhaust significantly. More dyno documented power and better throttle response. So now having two of these ceramic honey comb devices in our exhaust pathways doesn't seem like progress, but rather regulation driven digression.
Just my opinion, but sport headers with good quality HJS cats and a resonated OAP would be a great option to have. You can then mate it to whatever rear section you so chose, with the x-pipe versions such as Johnny's likely yielding the best results.
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Andrewpiper (12-28-2022)
02-11-2021, 08:16 PM
#42
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Enjoy hearing everyones comments on a great exhaust that promotes the flat-six sound we are all are sorta missing from the OEM exhaust offering. It also seems like the GPF, although not desirable for many reasons, offers some sound and drone attenuation. This appears to be necessary for most folks to be the happy with their rear section upgrades.
That begs the question for someone to make a resonated OAP. We can have some drone reduction and calm down the overall volume as well. For those still using the OEM rear muffler, you would at least have some sound damping in the direct pathway when hitting the PSE button. Otherwise it is straight out with the deletion of the GPF. If a couple of manufacturers can put a cat back there, why not a resonator. The added cost would not be that high either.
Some say the GPF makes power and others say it does not. In either case, I would like it gone. Don't need the extra weight, the heat containment, nor the reduced throttle response. There is no way that pile of broken up ceramic as seen in the dummy delete thread is good for the performance of our motors. It looks so solid with more matrix than air passages. I know from expericne that going from an OEM ceramic cat to a 200-cell HJS cat opens up the exhaust significantly. More dyno documented power and better throttle response. So now having two of these ceramic honey comb devices in our exhaust pathways doesn't seem like progress, but rather regulation driven digression.
Just my opinion, but sport headers with good quality HJS cats and a resonated OAP would be a great option to have. You can then mate it to whatever rear section you so chose, with the x-pipe versions such as Johnny's likely yielding the best results.
That begs the question for someone to make a resonated OAP. We can have some drone reduction and calm down the overall volume as well. For those still using the OEM rear muffler, you would at least have some sound damping in the direct pathway when hitting the PSE button. Otherwise it is straight out with the deletion of the GPF. If a couple of manufacturers can put a cat back there, why not a resonator. The added cost would not be that high either.
Some say the GPF makes power and others say it does not. In either case, I would like it gone. Don't need the extra weight, the heat containment, nor the reduced throttle response. There is no way that pile of broken up ceramic as seen in the dummy delete thread is good for the performance of our motors. It looks so solid with more matrix than air passages. I know from expericne that going from an OEM ceramic cat to a 200-cell HJS cat opens up the exhaust significantly. More dyno documented power and better throttle response. So now having two of these ceramic honey comb devices in our exhaust pathways doesn't seem like progress, but rather regulation driven digression.
Just my opinion, but sport headers with good quality HJS cats and a resonated OAP would be a great option to have. You can then mate it to whatever rear section you so chose, with the x-pipe versions such as Johnny's likely yielding the best results.
They will be the last of our modular products for this platform... Non valved parts to follow too as mentioned above
JC
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sobiloff (02-12-2021)
02-11-2021, 09:57 PM
#43
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UncleDude (02-11-2021)
02-12-2021, 12:43 PM
#44
Rennlist Member
Hey Jonny, Do you know the decibel difference between Silenced Race Pipe w/ OPF delete pipes vs. Silenced Race Pipe w/ Silenced OPF deletes? I wonder if doing both silenced sections would still be louder than OEM.
02-13-2021, 06:25 PM
#45
Rennlist Member
