Question about side deletes
#76
Yeah I heard 997 and 991 GT3 exhaust stuff should be swappable..but 3k to guinea pig is a lot
#77
Do you have a website?
#78
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How come some manufacturers have a valved side delete for 991 and a different one for 997? And some have the same for both.
Interesting to note that reading the 991 thread, it seems that for those wishing to combine valved side deletes and center delete-I believe I read that there isn't enough support for the whole thing unless there are extra brackets for the sides(?)
I have indeed thought about valved sides to go with my center delete(FVD)
I've held back, because I'd have to start the car in the garage with the door closed since a cold start is quite a bit louder until the air pump kicks in-so even with the valves closed to warm up, it might be a bit much unless i used towels on the tips or something. Maybe not that bad, but anyway, there are times I sure do want wide open pipes, but I also like the option of quiet mode, and with the Carnewal I can change at will at any rpm. This is good when you want to listen to engine sound, to evaluate let's say power steering, pulley/belt sounds, even tire sounds which you can hear if you get a nail. With a loud exhaust something could be going on and you might not hear it. A towel or a shoe on the tips might be the solution at idle I guess
I have 2 loud bikes, a two stroke 750 with straight "stingers" and a Z1 900 with open Vance and Hines pipe. But a 3.8L engine with straight pipes might be a big difference. I crank my bikes at night and "sneak" out. They're pretty loud but at idle I consider it acceptable. Maybe neighbors are pissed but none have complained. Otherwise there are 458s with straight pipes around here, Mustangs and Camaros too. They are super loud, I hear them every day.
There is a center bypass made in the UK that has small mufflers on the top section, but by then wouldn't that be what the OEM center is more or less with valved sides?
Loud pipes
Interesting to note that reading the 991 thread, it seems that for those wishing to combine valved side deletes and center delete-I believe I read that there isn't enough support for the whole thing unless there are extra brackets for the sides(?)
I have indeed thought about valved sides to go with my center delete(FVD)
I've held back, because I'd have to start the car in the garage with the door closed since a cold start is quite a bit louder until the air pump kicks in-so even with the valves closed to warm up, it might be a bit much unless i used towels on the tips or something. Maybe not that bad, but anyway, there are times I sure do want wide open pipes, but I also like the option of quiet mode, and with the Carnewal I can change at will at any rpm. This is good when you want to listen to engine sound, to evaluate let's say power steering, pulley/belt sounds, even tire sounds which you can hear if you get a nail. With a loud exhaust something could be going on and you might not hear it. A towel or a shoe on the tips might be the solution at idle I guess
I have 2 loud bikes, a two stroke 750 with straight "stingers" and a Z1 900 with open Vance and Hines pipe. But a 3.8L engine with straight pipes might be a big difference. I crank my bikes at night and "sneak" out. They're pretty loud but at idle I consider it acceptable. Maybe neighbors are pissed but none have complained. Otherwise there are 458s with straight pipes around here, Mustangs and Camaros too. They are super loud, I hear them every day.
There is a center bypass made in the UK that has small mufflers on the top section, but by then wouldn't that be what the OEM center is more or less with valved sides?
Loud pipes
In regards to supporting the exhaust system when combining side and center muffler bypass pipes, this should be something considered in purchasing a setup. With few exception, when you delete a center or side muffler on the GT3s it relies on the other factory muffler supports to support the exhaust system. Deleting both center and side mufflers would essentially leave just the clamps to the headers supporting the exhaust, which will not do. This is why we developed our own custom support brackets to use with our combined center and side muffler bypass pipes (our Modular Competition Exhaust Package, soon to be added to our 997 GT3 website page). Here is a photo of the support brackets we developed.
Hey John, Here's the link to the Carnewal system. Others have reported that you simply insert this device inbetween the vacuum solenoid switch itself (which resides on topside of motor, pass side. see pic,) and the electrical connection to it. Then find a local frame connection for a ground wire. Refer to JB911's picture and description in Post # 54 above.
simple.
http://www.carnewal.com/products/987...Manual-Control
I just joined the Smokies GT group over the winter, so I missed the cut for this 2019 trip (& I understand the waitlist is long too). Wife & I are hoping to make the 2020 trip. Yes, hope we can meet up sometime down in those mountains. Drove a bunch of those roads on a 2017 Treffen around Asheville. Really want to go back. I'm also energized for the Smokies give-back Charity event on that trip too. I am always interested in meeting other Porsche enthusiasts / GT owners who are also willing to give back to their communities. They're dedication to Cystic Fibrosis is a good one.
Take care,
=Steve
simple.
http://www.carnewal.com/products/987...Manual-Control
I just joined the Smokies GT group over the winter, so I missed the cut for this 2019 trip (& I understand the waitlist is long too). Wife & I are hoping to make the 2020 trip. Yes, hope we can meet up sometime down in those mountains. Drove a bunch of those roads on a 2017 Treffen around Asheville. Really want to go back. I'm also energized for the Smokies give-back Charity event on that trip too. I am always interested in meeting other Porsche enthusiasts / GT owners who are also willing to give back to their communities. They're dedication to Cystic Fibrosis is a good one.
Take care,
=Steve
The question comes up quite frequently-the 991 thread goes into it, and as mentioned there is talk that with center and side deletes, there may not be enough support on the sides(?)
The AWE Switchpath is just that, valved sides and center delete. So with valves activated there is probably a small difference in sound since the path is now through the smaller upper pipes.
To achieve "dead quiet",... sounds like you'd need to retain the side mufflers, plus a CMB with top-side muffler as you described. ... might just be the "best you can do" (if you can find it).
Seems the reason most guys that want a "Silent" option at the flick of a switch, want it for either the track (where the track is measuring decibels at a certain section of the track),... or morning startup & not bothering neighbors. The latter is easy enough when keeping the side mufflers, operational valves (w/ Carnewal),... and a CMB. It's close enough for the neighbors.
Seems the reason most guys that want a "Silent" option at the flick of a switch, want it for either the track (where the track is measuring decibels at a certain section of the track),... or morning startup & not bothering neighbors. The latter is easy enough when keeping the side mufflers, operational valves (w/ Carnewal),... and a CMB. It's close enough for the neighbors.
Man that JCR stuff... Their race pipe is the best exhaust i've ever heard
I emailed them about 997 GT3 fitments back in Feb but haven't heard anything since: "We have a 997 coming in soon to test fit, in theory the pipe should fit no problem but of course we just want to clarify that everything is correct first ourselves before selling to customers."
I emailed them about 997 GT3 fitments back in Feb but haven't heard anything since: "We have a 997 coming in soon to test fit, in theory the pipe should fit no problem but of course we just want to clarify that everything is correct first ourselves before selling to customers."
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SOUL PERFORMANCE PRODUCTS
Quality Exhaust Solutions, Fair Pricing, and Outstanding Service
John Gaydos- Owner, Performance Specialist
Cell - (484) 883-6197
johng@soulpp.com
Jon Wheel - Marketing Manager
jwheel@soulpp.com
#79
Rennlist Member
John Wartique's car sounds phenomenal-sure would like to know what exhaust it is:
At the beginning of the video there's a glimpse of the exhaust under the protection plate-
At the beginning of the video there's a glimpse of the exhaust under the protection plate-
#80
Instructor
Current exhaust is Fabspeed valved side deletes and Dundon Quiet center muffler. It still is louder than stock, but I can make sound limits on track.
My wife hates riding in my car....
#81
Rennlist Member
I think you just answered my question. I would love to lose all that weight of the side mufflers, but not at the cost of droning, and exploding center muffler units. Currently I have a SW center bypass. Looks like I will keep it heavy, quiet and non-self-destroying - and keep my wife loving the car to boot!! Thanks for the help.
#82
Rennlist Member
^^^ I'm right there with ya Jim.
And I'm sure you saw over on the recent Carnewal discussion thread, I'm hoping that solution will give me the flexibility to enjoy "always open -or- always closed" valve actuation. I can't believe Porsche did not engineer that into these cars from day 1. That 3k / 4k close/open, based on vacuum, was a crappy idea.
It's the same crappy idea that the GM engineers did back between 1967 (for the RS Camaro hideaway headlights, which worked perfectly using electric),... and then messed it up the next year in 1968 when they converted that system to vacuum for the hideaway headlights. Errrg. My '68 hideaways are a PIA.
Oh, and Btw, I have QTEC QTP ELECTRIC cutout valves on the headers of my '68 too,... and that rattles windows in the next neighborhood over!! But the electric cutouts have worked perfectly for over a decade!!
=Steve
And I'm sure you saw over on the recent Carnewal discussion thread, I'm hoping that solution will give me the flexibility to enjoy "always open -or- always closed" valve actuation. I can't believe Porsche did not engineer that into these cars from day 1. That 3k / 4k close/open, based on vacuum, was a crappy idea.
It's the same crappy idea that the GM engineers did back between 1967 (for the RS Camaro hideaway headlights, which worked perfectly using electric),... and then messed it up the next year in 1968 when they converted that system to vacuum for the hideaway headlights. Errrg. My '68 hideaways are a PIA.
Oh, and Btw, I have QTEC QTP ELECTRIC cutout valves on the headers of my '68 too,... and that rattles windows in the next neighborhood over!! But the electric cutouts have worked perfectly for over a decade!!
=Steve