Best Exhaust for a 991.2 GT3
#871
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Unless the car is a dedicated track car, most people go with the valved smb due to the fact you can reduce cabin presence by closing the valves and it maintains the PSE function. The valves closed routes the exhaust through the more restrictive top entry of the center muffler, it does make a difference. Track guys don't need the valves closed at lower rpms, so they'd rather save the costs and extra 3lbs of the valves.
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jwheel@soulpp.com
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
#872
Race Director
Zero...absolutely ZERO drone with the Soul Valved by-pass pipes. This is because of the valves and the way Soul has designed the upper and lower pipe lengths Soul has explained. The car sounds fantastic, very stock like around town cracking the throttle open driving in traffic in the city and congested suburbs....not annoying at all. And above 4k rpm there is more sound and it screams above 6krpm to redline but not ear defining.
I'd say that this is the way the car would come from the factory if Porsche wasn't dealing with strict Euro noise reg's. The Soul pipes are extreme high quality, fit perfectly just slipped right on.
I'd say that this is the way the car would come from the factory if Porsche wasn't dealing with strict Euro noise reg's. The Soul pipes are extreme high quality, fit perfectly just slipped right on.
Last edited by mdrums; 01-07-2019 at 10:08 PM.
#873
Zero...absolutely ZERO drone with the Soul Valved by-pass pipes. This is because of the valves and the way Should has designed the upper and lower pipe lengths Soul has explained. The car sounds fantastic, very stock like around town cracking the throttle open driving in traffic in the city and congested suburbs....not annoying at all. And above 4k rpm there is more sound and it screams above 6krpm to redline but not ear defining.
I'd say that this is the way the car would come from the factory if Porsche wasn't dealing with strict Euro noise reg's. The Soul pipes are extreme high quality, fit perfectly just slipped right on.
I'd say that this is the way the car would come from the factory if Porsche wasn't dealing with strict Euro noise reg's. The Soul pipes are extreme high quality, fit perfectly just slipped right on.
#874
Race Director
Those big heavy 45 lbs of side mufflers don’t do a whole lot they do some in making the exhaust too quiet...glad those are dumped off the car
#875
It would help to have the two types categorized to start, bypasses and exhausts, as I have a difficult time identifying the differences.
As far as I can tell, the bypasses add some sound and retain the PSE function.
The exhausts also remove weight by reducing size of side mufflers, and add power.
Then, some exhausts leave the stock center section, while other replace the whole thing. Some exhausts do away with the cats completely but then require an ECU tune and tend to drone in exchange for significant power increases.
For me personally It’s quite confusing with this particular car, unlike others where it’s quite easy to drill down into the differences. I have a gmg center delete available to install but would be willing to buy something more complete if j understood the clear pros and cons of each solution.
As far as I can tell, the bypasses add some sound and retain the PSE function.
The exhausts also remove weight by reducing size of side mufflers, and add power.
Then, some exhausts leave the stock center section, while other replace the whole thing. Some exhausts do away with the cats completely but then require an ECU tune and tend to drone in exchange for significant power increases.
For me personally It’s quite confusing with this particular car, unlike others where it’s quite easy to drill down into the differences. I have a gmg center delete available to install but would be willing to buy something more complete if j understood the clear pros and cons of each solution.
#876
Just driving around is where the exhaust volume needs the most improvement imo. Sure some extra volume at high load/high rpm is welcome, but the valves closed area is where I feel the stock system really lacks. This engine and car deserve so much better in the valve closed position. If valved bypasses don't significantly wake up that area, then it's missing the area I most want to improve. I'm wondering if something like catted headers with side bypass plus one of the more mild center deletes like SW is the way to go to get significant power/torque increase, weight loss, and sound increase hopefully without drone.
#877
Just driving around is where the exhaust volume needs the most improvement imo. Sure some extra volume at high load/high rpm is welcome, but the valves closed area is where I feel the stock system really lacks. This engine and car deserve so much better in the valve closed position. If valved bypasses don't significantly wake up that area, then it's missing the area I most want to improve. I'm wondering if something like catted headers with side bypass plus one of the more mild center deletes like SW is the way to go to get significant power/torque increase, weight loss, and sound increase hopefully without drone.
#878
Tone really hasn’t changed.... I’m thinking tone is slightly more throaty mid throttle shifting around 5k....idle is just slightly louder...cursing at 2500-3200 rpm no exhaust drone or noise basically stock like...nothing in the cabin is intrusive....I’m shocked....really happy. I could stand it possibly a touch louder so I’ll just unhook the valves...plug the line the a golf tee and zip tie and see how that goes.
Those big heavy 45 lbs of side mufflers don’t do a whole lot they do some in making the exhaust too quiet...glad those are dumped off the car
#879
Rennlist Member
Question for me is knowing how the various offerings of valved side muffler deletes differ in operation, if at all? Is there a way to control whether the valves remain open or closed irrespective of the cars ecu / rpm's? If I recall isn't there a vendor that offers the option of affixing the valve open or closed via separate toggle?
Maybe some of the vendors can chime in?
Maybe some of the vendors can chime in?
#880
Rennlist Member
On a sound only basis this is similar to expecting a group of people auditioning six different sets of speakers and expecting them to pick one as the best. The perception of sound is a very personal thing.
#881
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Phil from Fabspeed.
We have valved bypass pipes that you can control the valve as you would want. We do not suggest closing at high RPMs for long periods of time because of the restriction that it causes. Closing the valves at higher RPMs can cause an issue with the center muffler. There are really three options for the valve control on your Porsche. First, you hook it into the PSE button. Second, option we offer it as a key fob, most guys hook it onto the key chain or keep it in the glove box. Third, and lastly you can hook it into the home link on the visor you just have to click the visor everytime you want to open or close the valves.
We have valved bypass pipes that you can control the valve as you would want. We do not suggest closing at high RPMs for long periods of time because of the restriction that it causes. Closing the valves at higher RPMs can cause an issue with the center muffler. There are really three options for the valve control on your Porsche. First, you hook it into the PSE button. Second, option we offer it as a key fob, most guys hook it onto the key chain or keep it in the glove box. Third, and lastly you can hook it into the home link on the visor you just have to click the visor everytime you want to open or close the valves.
__________________
Porsche Performance Specialist
John@Fabspeed.com
215-618-9796
Fabspeed Motorsport USA
155 Commerce Drive Fort Washington, PA 19034
www.Fabspeed.com
Porsche Performance Specialist
John@Fabspeed.com
215-618-9796
Fabspeed Motorsport USA
155 Commerce Drive Fort Washington, PA 19034
www.Fabspeed.com
#882
Basic Sponsor
Rennlist
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Zero...absolutely ZERO drone with the Soul Valved by-pass pipes. This is because of the valves and the way Soul has designed the upper and lower pipe lengths Soul has explained. The car sounds fantastic, very stock like around town cracking the throttle open driving in traffic in the city and congested suburbs....not annoying at all. And above 4k rpm there is more sound and it screams above 6krpm to redline but not ear defining.
I'd say that this is the way the car would come from the factory if Porsche wasn't dealing with strict Euro noise reg's. The Soul pipes are extreme high quality, fit perfectly just slipped right on.
I'd say that this is the way the car would come from the factory if Porsche wasn't dealing with strict Euro noise reg's. The Soul pipes are extreme high quality, fit perfectly just slipped right on.
Tone really hasn’t changed.... I’m thinking tone is slightly more throaty mid throttle shifting around 5k....idle is just slightly louder...cursing at 2500-3200 rpm no exhaust drone or noise basically stock like...nothing in the cabin is intrusive....I’m shocked....really happy. I could stand it possibly a touch louder so I’ll just unhook the valves...plug the line the a golf tee and zip tie and see how that goes.
Those big heavy 45 lbs of side mufflers don’t do a whole lot they do some in making the exhaust too quiet...glad those are dumped off the car
Those big heavy 45 lbs of side mufflers don’t do a whole lot they do some in making the exhaust too quiet...glad those are dumped off the car
Just driving around is where the exhaust volume needs the most improvement imo. Sure some extra volume at high load/high rpm is welcome, but the valves closed area is where I feel the stock system really lacks. This engine and car deserve so much better in the valve closed position. If valved bypasses don't significantly wake up that area, then it's missing the area I most want to improve. I'm wondering if something like catted headers with side bypass plus one of the more mild center deletes like SW is the way to go to get significant power/torque increase, weight loss, and sound increase hopefully without drone.
Question for me is knowing how the various offerings of valved side muffler deletes differ in operation, if at all? Is there a way to control whether the valves remain open or closed irrespective of the cars ecu / rpm's? If I recall isn't there a vendor that offers the option of affixing the valve open or closed via separate toggle?
Maybe some of the vendors can chime in?
Maybe some of the vendors can chime in?
As for basic valve function, all the different options out there that I have seen use vacuum actuated valves, which means it retains the exact same PSE functionality as before. That said, there is indeed a way to override the PSE control. We also offer a universal valve controller kit that utilizes the Homelink buttons to override the PSE for 100% open or closed. I wouldn't necessarily recommend running it valves closed with sustained high rpm abuse for muffler longevity, but sometimes you have no choice but to accept that as a wearable item in the event you need to pass DB limitations at various tracks. You can also tie in a GPS controller to the valve controller kit to close the valves at various points of a track, which helps pass sound checks given you know where they are recording.
Very well said Alan, I may use that analogy in the future if you don't mind haha
Last edited by Soul Performance; 01-15-2019 at 11:13 AM.
#883
Drifting
There's a recent video on YT of Sharkwerks + valves disconnected. Sounds good. Guy says there is no drone.
#884
Race Director
I know now i owe you a video and i'll get it done...soon!!!
Guys, Soul makes an awesome product plus they are active on the forums, they are hear too help with your decision.. John is a Porsche guy, track guy great driver so he understands us....can't get better than that!
#885
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I need some funny bloke from Youtube with a cool accent to drive one of our cars, it's what all the cool kids are doing and now I feel left out haha. Anybody know a guy?
Mike that's great feedback with the valves unplugged, thank you! This is also relevant feedback to what people can expect from non-valved, dual-entry side muffler bypass pipes like ours. Video would be great at your convenience, side muffler bypass pipes don't have many good videos out there in action for the community to make a sound comparison in their exhaust search.
That last bit was kind of you to say Mike, I appreciate that Speaking of the track, I'm pulling my hair out here in cold and snowy PA. I'm going to make an effort to catch a flight down for the PCA event on Feb. 23/24 at Sebring. My Cayman R is still down there, so if it works out I'll instruct both days, get a little seat time then drive it back up here. If you plan on going, it would be great to see you
Mike that's great feedback with the valves unplugged, thank you! This is also relevant feedback to what people can expect from non-valved, dual-entry side muffler bypass pipes like ours. Video would be great at your convenience, side muffler bypass pipes don't have many good videos out there in action for the community to make a sound comparison in their exhaust search.
That last bit was kind of you to say Mike, I appreciate that Speaking of the track, I'm pulling my hair out here in cold and snowy PA. I'm going to make an effort to catch a flight down for the PCA event on Feb. 23/24 at Sebring. My Cayman R is still down there, so if it works out I'll instruct both days, get a little seat time then drive it back up here. If you plan on going, it would be great to see you