Which JCR exhaust should I get?
09-04-2019, 11:59 PM
#16
Rennlist Member
Check in with Matt at www.obsessedgarage.com he'll have your answers.
I highly doubt he ^^ has tried one or more JCR exhausts on his 991.1RS....yet.
If I'm wrong, please correct me.
09-05-2019, 04:02 AM
#18
The car is almost stock driving around but after 5k rpm the sound is louder than OEM.
I think of all the JCR options is either the superlight BP or the silenced race pipe !
03-01-2020, 06:52 PM
#19
thanks in advance!
03-01-2020, 07:28 PM
#21
03-01-2020, 08:55 PM
#22
Looking forward to hearing more about the exhaust
03-01-2020, 10:13 PM
#23
Rennlist Member
You beat me to it! The only exhaust that sounds stock with the valves closed is the stock OEM system (and maybe OEM sides with the Dundon "Orange" center). I have OEM sides and a JCR silenced CMB and it doesn't sound even close to stock with the valves closed. I hope people shopping for exhausts use a little common sense before they buy a system based on an internet post!
03-01-2020, 10:55 PM
#24
I have had both setups and I can tell you that there is definitely a big difference from valved and non valved. I first ran a non valved version with stock headers and it was good but I wanted to run headers. There was no way I was going to run JCR headers with non valved race pipe because CA exhaust laws are annoying af. I got the valved race pipe now with headers and its the best sounding setup i've had on the car. You have a button in your car to control the valves so why not use that when you have the chance? When I turn the valves off and take the car off of sport, the car sounds stock. (No Joke) I will be making videos on this so I'll post them up
03-01-2020, 10:56 PM
#25
03-01-2020, 11:23 PM
#26
I have the valved JCR exhaust setup (on a 991.2 GT3 manual) and it sounds amazing. Some difference between valves open vs. closed but not night/day. When open it goes to "11!". Enjoy.
03-03-2020, 12:43 AM
#28
Intermediate
Regarding the valved vs non-valved race pipe debate:
Valved if you plan on running a catless setup;
Non-valved if retaining stock headers.
While running stock headers in combination with the valved catback race pipe, the exhaust valves provide little to no sound deafening.
-Valved race pipe owner
Valved if you plan on running a catless setup;
Non-valved if retaining stock headers.
While running stock headers in combination with the valved catback race pipe, the exhaust valves provide little to no sound deafening.
-Valved race pipe owner
03-03-2020, 04:41 AM
#29
This is what i can tell you after installing the JCR Superlight weight exhaust. With the RPMS from 1-4 it is around 5-8 % louder than stock. Tone is slightly deeper. With the RPMS over 4-9 it transitions from 15-20% louder. At 6k is where it
sounds amazing. Tone is much higher in pitch and it starts to be formula like. I cannot imagine how the Valved race pipe will be. If you want something amazing and perfectly balanced and not overly loud I would definately go with the Super light.
If you like loud then I would go valved Race pipe. Keep in mind the valved race pipe starts to get loud at just 3k RPM under load where the Super Light is nearly stock until 4k when the valves start to open. There is also a bit of Drone from 2.2-3k so
keep that in mind. Hope that helps.
sounds amazing. Tone is much higher in pitch and it starts to be formula like. I cannot imagine how the Valved race pipe will be. If you want something amazing and perfectly balanced and not overly loud I would definately go with the Super light.
If you like loud then I would go valved Race pipe. Keep in mind the valved race pipe starts to get loud at just 3k RPM under load where the Super Light is nearly stock until 4k when the valves start to open. There is also a bit of Drone from 2.2-3k so
keep that in mind. Hope that helps.
03-03-2020, 10:42 AM
#30
Rennlist Member
Sold it to Satir29 yesterday, quickest transaction ever since he was semi-local. Good luck with your search!
After owning a standard Race Pipe and making the switch to the Silenced Race Pipe, I'll have to agree with the above if you do a lot of street driving. The Silenced Race Pipe is absolutely perfect for those that want something louder than a CMB, with power gains and weight savings to boot. The standard Race Pipe makes all of the right pops, spits, and burbbles like an RSR, but it's just screams for attention and is just too obnoxious on the street. I'll miss it out on track and those times I want to ruin a bachelorette party brunch on a patio at some street corner, but I felt like it's just too rowdy for anything else. One pull and the cops are on the hunt!
The Silence Race Pipe keeps the same high pitched tone, but smooths everything out. It still is loud outside of the car when you're really getting after it, but very tolerable inside. It's perfect for street & track work IMO. This exhaust that will stay on the car for the duration of my GT3 ownership. I'll make some videos comparing the Silenced and Standard Race Pipe next track outing
After owning a standard Race Pipe and making the switch to the Silenced Race Pipe, I'll have to agree with the above if you do a lot of street driving. The Silenced Race Pipe is absolutely perfect for those that want something louder than a CMB, with power gains and weight savings to boot. The standard Race Pipe makes all of the right pops, spits, and burbbles like an RSR, but it's just screams for attention and is just too obnoxious on the street. I'll miss it out on track and those times I want to ruin a bachelorette party brunch on a patio at some street corner, but I felt like it's just too rowdy for anything else. One pull and the cops are on the hunt!
The Silence Race Pipe keeps the same high pitched tone, but smooths everything out. It still is loud outside of the car when you're really getting after it, but very tolerable inside. It's perfect for street & track work IMO. This exhaust that will stay on the car for the duration of my GT3 ownership. I'll make some videos comparing the Silenced and Standard Race Pipe next track outing