JCR Titanium Silenced & Non-Silenced Centre Bypass
10-27-2018, 05:00 AM
#61
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Im sure you won’t be disappointed! More and more bypasses heading out, many to RL members so I’m sure there will be many reviews on the way
Can’t wait to hear your thoughts! Very interesting as you have great experience of many different exhaust combinations
The box feels spookily light doesn’t it! I did think the same when packaging the first bypass up
This will be our most extreme, lightweight and loudest setup. Not for the faint of heart however the sound is truly incredible and cannot be compared
Yes, two options you could say. The AWE system is sold as a complete unit, sides centre and tips.
Our comparable version would be our Titanium valved side silencer deletes combined with our Titanium non silenced centre bypass. It’s your choice if you then run OEM tips or our own Titanium bolt-on tips.
Another option would be to run again our Titanium valved side silencer deletes but this time with our Titanium silenced centre bypass. This means that unlike the AWE system when valves are closed the exhaust gasses pass through silencers, further reducing the exhaust volume beyond that of just simply the smaller exhaust diameter.
Obviously complete preference is yours however the reason we have structured our exhaust offerings in a modular way is for this exact reason. To give owners the choice of creating the best tailor made exhaust system for their own tastes.
JC
10-27-2018, 02:37 PM
#62
Three Wheelin'
10-27-2018, 03:34 PM
#63
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10-27-2018, 04:45 PM
#64
Im sure you won’t be disappointed! More and more bypasses heading out, many to RL members so I’m sure there will be many reviews on the way
Can’t wait to hear your thoughts! Very interesting as you have great experience of many different exhaust combinations
The box feels spookily light doesn’t it! I did think the same when packaging the first bypass up
This will be our most extreme, lightweight and loudest setup. Not for the faint of heart however the sound is truly incredible and cannot be compared
Yes, two options you could say. The AWE system is sold as a complete unit, sides centre and tips.
Our comparable version would be our Titanium valved side silencer deletes combined with our Titanium non silenced centre bypass. It’s your choice if you then run OEM tips or our own Titanium bolt-on tips.
Another option would be to run again our Titanium valved side silencer deletes but this time with our Titanium silenced centre bypass. This means that unlike the AWE system when valves are closed the exhaust gasses pass through silencers, further reducing the exhaust volume beyond that of just simply the smaller exhaust diameter.
Obviously complete preference is yours however the reason we have structured our exhaust offerings in a modular way is for this exact reason. To give owners the choice of creating the best tailor made exhaust system for their own tastes.
JC
10-27-2018, 05:03 PM
#65
Instructor
JCR, where are you located in the UK (couldn't find location info on your website)?I will be visiting family in London in a couple weeks and would like to swing by and see your products in the flesh. Would be nice to hear a demo too. My RS is due in February.
10-27-2018, 06:59 PM
#66
I always thougth that with the valves exhaust gases went through the side mufflers then the center, with it open they bypassed the side mufflers to the center. With the side mufflers replaced I don't see what the valves are directing the gases too? Unless they only work with the silenced centers and gases go through silencers as well when off.
10-27-2018, 08:38 PM
#67
Three Wheelin'
I always thougth that with the valves exhaust gases went through the side mufflers then the center, with it open they bypassed the side mufflers to the center. With the side mufflers replaced I don't see what the valves are directing the gases too? Unless they only work with the silenced centers and gases go through silencers as well when off.
10-28-2018, 05:51 AM
#68
Intermediate
I found the workings of the standard exhaust/muffler system to be a bit of a challenge to understand, too, but picking up information from various posts made here and elsewhere (many thanks for that) and adding a bit of my own detective work, I wrote up a summary of how the GT3 exhaust system (including the valves) works. I'll try to attach it, if I can... The images are taken from a 997GT3 but I understand that the 991 is identical in concept - although the control strategy for the valves (when, and under what circumstances, they are opened or closed) is different between the two generations of vehicle.
Knowing how the stock system works is a good basis for understanding how different aftermarket configurations will work.
Happy to be picked-up on any of this if I've got it wrong!
James
Knowing how the stock system works is a good basis for understanding how different aftermarket configurations will work.
Happy to be picked-up on any of this if I've got it wrong!
James
Last edited by jbatchelor; 10-30-2018 at 05:00 AM.
10-28-2018, 07:29 AM
#69
Race Car
Join Date: Jan 2013
Location: The way to hell is paved by good intentions “Wenn ich Purist höre...entsichere ich meinen Browning” "Myths are fuel for marketing (and nowadays for flippers too,,,)" time to time is not sufficient to be a saint, you must be also an Hero
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OEM SETUP:
To summarize the JC deep dive
there are virtually 3 OEM silencers (aka mufflers)
1 central (eventhough 1 left 1 right receiving the gasses we can consider as 1 central silencer)
and of course we have 1 left side and 1 right side aka side mufflers and we have 1 left side valve
plus 1 right side valve,
the vzlves are in between the central OEM silencer(s) and the two side OEM silencers
OEM SETUP:
Left Silencer.................................Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
...........,,...........,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I........................I
...........................CentralSilencers......................I
...............................I..................I..........................I
..................................Tailpipes________________I
.....................................I.....I
Common Config 1
you keep a central silencer
whether keeping the CENTRAL OEM muffler or buy 3rd party central silencer (i.e. JCR provide a less restrictive center silencer(s) , correct me if wrong)
the above combined with
a 3rd party Valved SIDE silencers DELETE
when valves are closed the central oem or 3rd party silencer(s) get all gasses reducing the noise according to its capability and until valves will open at 4500
with valves opened you have from the catalysers a straight pipe until your tail pipes
virtually no drone from what reported by RLers
and you keep some back pressure while beiing under 4500rpm that looks like useful to keep lo mid rpm torque
Common Config 1
NOLeft Silencer.....................NO Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
.........................,......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I..........................I
............................CentralSilencers.....................I
...................................I...........I.............................I
...............................Tailpipes__________________I
......................................I.....I
Common config 2
you keep OEM SIDE silencers in place
and buy a 3rd party center silencer delete
here you have multiple combinations according to the 3rd party i.e. JCR or Akra lighter TI central delete or Fabspeed GMC stainless etc.
indeed only side OEM silencers are at work all time but no central silencer at all
where valves have from my understanding no more meaning because the central muffler is just a 2 straight pipes especially at low rpm when gasses pressure is lower
Common config 2
L Silencer............................................R Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
........................,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I.......................I
.....................NO. CentralSilencers.....................I
...............................I..................I.........................I
..................................Tailpipes________________I
.....................................I.....I
Common config 3
no valves , no side and no center silencers
sometime called race setup
indeed an high Db setup
NOL Silencer.................................NO.R Silencer
I....................................................................... .... I
I....................................................................... .... I
____NO Valve______..................____NO Valve___
I...........,,..........,.....(I).................(I).........................I
I............................(I).................(I).........................I
I............................(I)................(I)......................I
I.....................NO.CentralSilencers.......................I
I............................(I)................(I)..........................I
I___________________Tailpipes_________________I
......................................I.....I
To summarize the JC deep dive
there are virtually 3 OEM silencers (aka mufflers)
1 central (eventhough 1 left 1 right receiving the gasses we can consider as 1 central silencer)
and of course we have 1 left side and 1 right side aka side mufflers and we have 1 left side valve
plus 1 right side valve,
the vzlves are in between the central OEM silencer(s) and the two side OEM silencers
OEM SETUP:
Left Silencer.................................Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
...........,,...........,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I........................I
...........................CentralSilencers......................I
...............................I..................I..........................I
..................................Tailpipes________________I
.....................................I.....I
Common Config 1
you keep a central silencer
whether keeping the CENTRAL OEM muffler or buy 3rd party central silencer (i.e. JCR provide a less restrictive center silencer(s) , correct me if wrong)
the above combined with
a 3rd party Valved SIDE silencers DELETE
when valves are closed the central oem or 3rd party silencer(s) get all gasses reducing the noise according to its capability and until valves will open at 4500
with valves opened you have from the catalysers a straight pipe until your tail pipes
virtually no drone from what reported by RLers
and you keep some back pressure while beiing under 4500rpm that looks like useful to keep lo mid rpm torque
Common Config 1
NOLeft Silencer.....................NO Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
.........................,......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I..........................I
............................CentralSilencers.....................I
...................................I...........I.............................I
...............................Tailpipes__________________I
......................................I.....I
Common config 2
you keep OEM SIDE silencers in place
and buy a 3rd party center silencer delete
here you have multiple combinations according to the 3rd party i.e. JCR or Akra lighter TI central delete or Fabspeed GMC stainless etc.
indeed only side OEM silencers are at work all time but no central silencer at all
where valves have from my understanding no more meaning because the central muffler is just a 2 straight pipes especially at low rpm when gasses pressure is lower
Common config 2
L Silencer............................................R Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
........................,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I.......................I
.....................NO. CentralSilencers.....................I
...............................I..................I.........................I
..................................Tailpipes________________I
.....................................I.....I
Common config 3
no valves , no side and no center silencers
sometime called race setup
indeed an high Db setup
NOL Silencer.................................NO.R Silencer
I....................................................................... .... I
I....................................................................... .... I
____NO Valve______..................____NO Valve___
I...........,,..........,.....(I).................(I).........................I
I............................(I).................(I).........................I
I............................(I)................(I)......................I
I.....................NO.CentralSilencers.......................I
I............................(I)................(I)..........................I
I___________________Tailpipes_________________I
......................................I.....I
Last edited by fxz; 10-29-2018 at 12:11 AM.
10-28-2018, 10:35 AM
#70
Burning Brakes
I am am very happy with the results.
10-28-2018, 05:31 PM
#72
How much weight does your Titanium Race pipe save in weight over OEM..Am i correct in assuming that it also includes Titanium tips and offers the most power/torque increase..Any disadvantages and how antisocial will the noise be under 4k revs.Anybody fitted it to a 991.2GT3 yet and will it be possible to hear a video for it..
I live on a farm so i don't have to worry about waking neighbours up.Will it be available with your RL discount.?
Many thanks for your continued patience with my endless stupid questions but i want to pick the best one for me from the outset..
I live on a farm so i don't have to worry about waking neighbours up.Will it be available with your RL discount.?
Many thanks for your continued patience with my endless stupid questions but i want to pick the best one for me from the outset..
10-29-2018, 07:46 AM
#73
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Thread Starter
OEM SETUP:
To summarize the JC deep dive
there are virtually 3 OEM silencers (aka mufflers)
1 central (eventhough 1 left 1 right receiving the gasses we can consider as 1 central silencer)
and of course we have 1 left side and 1 right side aka side mufflers and we have 1 left side valve
plus 1 right side valve,
the vzlves are in between the central OEM silencer(s) and the two side OEM silencers
OEM SETUP:
Left Silencer.................................Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
...........,,...........,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I........................I
...........................CentralSilencers......................I
...............................I..................I..........................I
..................................Tailpipes________________I
.....................................I.....I
Common Config 1
you keep a central silencer
whether keeping the CENTRAL OEM muffler or buy 3rd party central silencer (i.e. JCR provide a less restrictive center silencer(s) , correct me if wrong)
the above combined with
a 3rd party Valved SIDE silencers DELETE
when valves are closed the central oem or 3rd party silencer(s) get all gasses reducing the noise according to its capability and until valves will open at 4500
with valves opened you have from the catalysers a straight pipe until your tail pipes
virtually no drone from what reported by RLers
and you keep some back pressure while beiing under 4500rpm that looks like useful to keep lo mid rpm torque
Common Config 1
NOLeft Silencer.....................NO Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
.........................,......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I..........................I
............................CentralSilencers.....................I
...................................I...........I.............................I
...............................Tailpipes__________________I
......................................I.....I
Common config 2
you keep OEM SIDE silencers in place
and buy a 3rd party center silencer delete
here you have multiple combinations according to the 3rd party i.e. JCR or Akra lighter TI central delete or Fabspeed GMC stainless etc.
indeed only side OEM silencers are at work all time but no central silencer at all
where valves have from my understanding no more meaning because the central muffler is just a 2 straight pipes especially at low rpm when gasses pressure is lower
Common config 2
L Silencer............................................R Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
........................,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I.......................I
.....................NO. CentralSilencers.....................I
...............................I..................I.........................I
..................................Tailpipes________________I
.....................................I.....I
Common config 3
no valves , no side and no center silencers
sometime called race setup
indeed an high Db setup
NOL Silencer.................................NO.R Silencer
I....................................................................... .... I
I....................................................................... .... I
____NO Valve______..................____NO Valve___
I...........,,..........,.....(I).................(I).........................I
I............................(I).................(I).........................I
I............................(I)................(I)......................I
I.....................NO.CentralSilencers.......................I
I............................(I)................(I)..........................I
I___________________Tailpipes_________________I
......................................I.....I
To summarize the JC deep dive
there are virtually 3 OEM silencers (aka mufflers)
1 central (eventhough 1 left 1 right receiving the gasses we can consider as 1 central silencer)
and of course we have 1 left side and 1 right side aka side mufflers and we have 1 left side valve
plus 1 right side valve,
the vzlves are in between the central OEM silencer(s) and the two side OEM silencers
OEM SETUP:
Left Silencer.................................Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
...........,,...........,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I........................I
...........................CentralSilencers......................I
...............................I..................I..........................I
..................................Tailpipes________________I
.....................................I.....I
Common Config 1
you keep a central silencer
whether keeping the CENTRAL OEM muffler or buy 3rd party central silencer (i.e. JCR provide a less restrictive center silencer(s) , correct me if wrong)
the above combined with
a 3rd party Valved SIDE silencers DELETE
when valves are closed the central oem or 3rd party silencer(s) get all gasses reducing the noise according to its capability and until valves will open at 4500
with valves opened you have from the catalysers a straight pipe until your tail pipes
virtually no drone from what reported by RLers
and you keep some back pressure while beiing under 4500rpm that looks like useful to keep lo mid rpm torque
Common Config 1
NOLeft Silencer.....................NO Right Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
.........................,......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I..........................I
............................CentralSilencers.....................I
...................................I...........I.............................I
...............................Tailpipes__________________I
......................................I.....I
Common config 2
you keep OEM SIDE silencers in place
and buy a 3rd party center silencer delete
here you have multiple combinations according to the 3rd party i.e. JCR or Akra lighter TI central delete or Fabspeed GMC stainless etc.
indeed only side OEM silencers are at work all time but no central silencer at all
where valves have from my understanding no more meaning because the central muffler is just a 2 straight pipes especially at low rpm when gasses pressure is lower
Common config 2
L Silencer............................................R Silencer
I....................................................................... .... I
I....................................................................... .... I
Valve_closepath>_...................___________Valve
........................,.......I..................I..........................I
...............................I..................I..< openpath >..I
...............................I..................I.......................I
.....................NO. CentralSilencers.....................I
...............................I..................I.........................I
..................................Tailpipes________________I
.....................................I.....I
Common config 3
no valves , no side and no center silencers
sometime called race setup
indeed an high Db setup
NOL Silencer.................................NO.R Silencer
I....................................................................... .... I
I....................................................................... .... I
____NO Valve______..................____NO Valve___
I...........,,..........,.....(I).................(I).........................I
I............................(I).................(I).........................I
I............................(I)................(I)......................I
I.....................NO.CentralSilencers.......................I
I............................(I)................(I)..........................I
I___________________Tailpipes_________________I
......................................I.....I
How much weight does your Titanium Race pipe save in weight over OEM..Am i correct in assuming that it also includes Titanium tips and offers the most power/torque increase..Any disadvantages and how antisocial will the noise be under 4k revs.Anybody fitted it to a 991.2GT3 yet and will it be possible to hear a video for it..
I live on a farm so i don't have to worry about waking neighbours up.Will it be available with your RL discount.?
Many thanks for your continued patience with my endless stupid questions but i want to pick the best one for me from the outset..
I live on a farm so i don't have to worry about waking neighbours up.Will it be available with your RL discount.?
Many thanks for your continued patience with my endless stupid questions but i want to pick the best one for me from the outset..
The exhaust is LOUD and the tone is glorious but not for the faint of heart. Especially when combined with our catless inconel race manifolds.
As for choosing the correct exhaust for you, its never easy. I guess you need to know if you would like to be able to quieten things down a little for more 'sensible' driving or if you're just looking for an out and out extreme sound and maximum performance and weight saving.
For the RL discount, depending on the success of this first centre bypass / side bypass / tips offer I will consider then doing something similar for each new product release
JC
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10-31-2018, 01:08 PM
#74
Basic Sponsor
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Thread Starter
More parts heading out to customers 
JC
JC
10-31-2018, 01:27 PM
#75
I’m really close to pulling the trigger, but can’t make up my mind between a straight center bypass and the bypass with silencers. i have some reading to do. My plan was to do the center bypass and retain oem sides to get more sound and tone but be able to go to quiet mode for neighbors and phone calls. Is this the correct setup? Can I do this with the non silenced center bypass?
can anyone comment on how this compares to Akra? Both titanium, akra the “name brand” is considerably higher priced.
can anyone comment on how this compares to Akra? Both titanium, akra the “name brand” is considerably higher priced.