SpydrGuy

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

Westcoast

Thanks for bringing this in here for comparison, it is not surprising that at full throttle the Silenced and non-silenced are very close, I have always thought the value of the silenced system is when you want/need it quieter, just cruising around, when those valves are closed the silencers really do help control the intensity of the exhaust, IMHO makes it manageable for me on the street and especially so with the OPF delete pipes.

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.

Reedy

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.

horns

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.

Reedy

Order placed. Time to find out what JCR charge for shipping.

Johnny, will you accept payment in Bitcoin by any chance?

BGB Motorsports

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.

neurotic

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

SBARacing

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?

neurotic

Cargraphics is what I have. Very, very happy with it. But you can disable the valves but the cabin will be boomy at some RPM ranges; sometimes when I'm out for a late night cruise, I don't want my ears to bleed so the valve controller comes in very handy.

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

brianch5351

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!

DocMo

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

Westcoast

Bad links... goes to JCR and gives no product found.

JCR-Porsche

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

SpydrGuy

Which one did you buy?

SpydrGuy

Absolutely!

You're not getting drone 2K-3K RPM?