997.2 PSE Muffler Hack ??
Three Wheelin'
Joined: Feb 2016
Posts: 1,662
Likes: 227
From: ABQ NM
I have PSE + Sharkwerks bypass on my GTS. Sounds great, don't want to change the tonality. Just that the volume is about a level 6/10 and I'm wanting 7.5/10... so my plan is to change out my stock headers for Cargraphic or some other header with 200cell cats. Don't want to change the cans as I like the sound I've got, just want more. Probably won't get to that until next year though.
Rennlist Member
Joined: Apr 2007
Posts: 8,548
Likes: 1,102
From: Florida
I have PSE + Sharkwerks bypass on my GTS. Sounds great, don't want to change the tonality. Just that the volume is about a level 6/10 and I'm wanting 7.5/10... so my plan is to change out my stock headers for Cargraphic or some other header with 200cell cats. Don't want to change the cans as I like the sound I've got, just want more. Probably won't get to that until next year though.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 146
Likes: 9
From: Raleigh, NC
PSE
If you do a Google image search for 997 PSE, you will see a few side cans with both PSE and the Gundo Hack. Unfortunately, I have not stumbled across any audio or video files of a PSE car with the Gundo Hack. So, I know people have done it, but I have no idea what effect it has on the sound.
I'm going to go out on a limb and say that once you've done the center muffler bypass and either have PSE or have done the Gundo to stock mufflers, you're probably past the point of diminishing returns with the components you've got. I'd say at that point you probably need to invest in an aftermarket exhaust--headers, mufflers, the whole kit and caboodle.
I second the recommendation of Henry's if you decide to do the hack on your PSE mufflers. I didn't notice you were from Raleigh until I read GoPirates' post. They did my Gundo (I took the mufflers to them) and I was very happy with the work and the price.
I haven't seen your car around town, but I'll keep an eye out. Good luck finding a Cars n' Coffee to go to. Both of the good ones have changed recently. Morrisville got canceled and Wake Forest is in flux because they lost their venue, too. They're currently at a church but I can guarantee that won't last long, considering how many dopes revved their engines coming in and leaving in July.
Hey GoPirates--send me a text. I switched phones (apple to android) and lost all of my contacts. I'd like to pick your brain--I'm about to do the drop on my car and loved how yours looked last time you came over. See my post from last week looking for some advice, too.
I'm going to go out on a limb and say that once you've done the center muffler bypass and either have PSE or have done the Gundo to stock mufflers, you're probably past the point of diminishing returns with the components you've got. I'd say at that point you probably need to invest in an aftermarket exhaust--headers, mufflers, the whole kit and caboodle.
I second the recommendation of Henry's if you decide to do the hack on your PSE mufflers. I didn't notice you were from Raleigh until I read GoPirates' post. They did my Gundo (I took the mufflers to them) and I was very happy with the work and the price.
I haven't seen your car around town, but I'll keep an eye out. Good luck finding a Cars n' Coffee to go to. Both of the good ones have changed recently. Morrisville got canceled and Wake Forest is in flux because they lost their venue, too. They're currently at a church but I can guarantee that won't last long, considering how many dopes revved their engines coming in and leaving in July.
Hey GoPirates--send me a text. I switched phones (apple to android) and lost all of my contacts. I'd like to pick your brain--I'm about to do the drop on my car and loved how yours looked last time you came over. See my post from last week looking for some advice, too.
Thank you for your input.You are probably right about my exhaust set-up being at it's threshold. I would love to turn this exhaust up 1 to 2 notches, but not too much - Cinderella exhaust.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 146
Likes: 9
From: Raleigh, NC
Headers ?
I have PSE + Sharkwerks bypass on my GTS. Sounds great, don't want to change the tonality. Just that the volume is about a level 6/10 and I'm wanting 7.5/10... so my plan is to change out my stock headers for Cargraphic or some other header with 200cell cats. Don't want to change the cans as I like the sound I've got, just want more. Probably won't get to that until next year though.
Drifting
Joined: Feb 2012
Posts: 2,612
Likes: 424
From: Raleigh, North Carolina
Greetings Triangle Resident. I am usually at SP Porsche and Road Scholars C&C - hopefully I will see you around.
Thank you for your input.You are probably right about my exhaust set-up being at it's threshold. I would love to turn this exhaust up 1 to 2 notches, but not too much - Cinderella exhaust.
Thank you for your input.You are probably right about my exhaust set-up being at it's threshold. I would love to turn this exhaust up 1 to 2 notches, but not too much - Cinderella exhaust.
As for headers, I think the effect on your HP and torque will depend on the headers and the downstream components. As long as the headers and the rest of the exhaust are quality, tested components that play well together, you shouldn't see any reduction in performance by making your exhaust more free-flowing.
Three Wheelin'
Joined: Feb 2016
Posts: 1,662
Likes: 227
From: ABQ NM
To my sophomoric understanding, with NA engines we have a lower limit on the amount of backpressure present. Meaning there comes a point where lowering it will change the area under the curve. I'm not sure it'd be enough to notice, but I plan to hedge my bets accordingly by going with 200 cell cats as opposed to going catless. Its all fuzzy logic at this point, and I'll just be doing it for noise (and hopefully a small amount of weight loss). Maybe I'll have a chance to hear a 997 without cats or with 200 cell cats between now and when I do it. I hope so, but I'm not too worried about it getting too loud as it isn't my daily anymore and I still retain PSE so I can just close the valves to drop the volume a little. Another reason to leave the cans in place and work around them, as opposed to going whole hog and buying a new valved system or just doing the cans
Drifting
Joined: Feb 2012
Posts: 2,612
Likes: 424
From: Raleigh, North Carolina
I have never understood the concept that backpressure helps performance. The advocates of that theory have never been able to explain it and there is plenty of evidence to prove that it’s bunk. Yet it lives on and people swear by it.
If if backpressure was good, top fuel dragsters would run full exhausts with cats and mufflers. In reality, the only reason they have pipes at all is to keep the exhaust from melting the bodywork and engine components—certainly not to develop the mythical benefits of backpressure.
You can mismatch components and screw screw with your exhaust flow and velocity, which are legitimate factors in engine performance. But backpressure is, by definition, an obstruction to flow.
If if backpressure was good, top fuel dragsters would run full exhausts with cats and mufflers. In reality, the only reason they have pipes at all is to keep the exhaust from melting the bodywork and engine components—certainly not to develop the mythical benefits of backpressure.
You can mismatch components and screw screw with your exhaust flow and velocity, which are legitimate factors in engine performance. But backpressure is, by definition, an obstruction to flow.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 146
Likes: 9
From: Raleigh, NC
Saturday August 25 11:00a CECC = Carolina Exotic Car Club open house = Cars, Coffee, and Cookout
RALEIGH, NC
https://www.joincecc.com/
https://www.joincecc.com/events-1/
RALEIGH, NC
https://www.joincecc.com/
https://www.joincecc.com/events-1/
Racer
Joined: Aug 2016
Posts: 316
Likes: 19
i have it on my GTS and I found it to be a huge improvement. Burbles on throttle lift off and some bangs on PDK upshifting. It could always be louder but it’s a great upgrade.
Rennlist Member
Joined: Nov 2004
Posts: 4,411
Likes: 148
From: Prospect, KY
Ideally for me, the PSE button would take it from stock to very aggressive. I either want it quiet for getting out of the neighborhood or long highway drives or I want it full-on for a spirited drive. Standard PSE isn't much louder than stock and leaves a lot to be desired.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 146
Likes: 9
From: Raleigh, NC
I've not heard of anyone hacking a PSE-equipped car and still retaining the PSE functionality. Not knowing exactly how the PSE mufflers are piped it's tough to know what the effect would be. Maybe Darin Fister has tried it?
Ideally for me, the PSE button would take it from stock to very aggressive. I either want it quiet for getting out of the neighborhood or long highway drives or I want it full-on for a spirited drive. Standard PSE isn't much louder than stock and leaves a lot to be desired.
Ideally for me, the PSE button would take it from stock to very aggressive. I either want it quiet for getting out of the neighborhood or long highway drives or I want it full-on for a spirited drive. Standard PSE isn't much louder than stock and leaves a lot to be desired.
Rennlist Member
Joined: Apr 2007
Posts: 8,548
Likes: 1,102
From: Florida
I've not heard of anyone hacking a PSE-equipped car and still retaining the PSE functionality. Not knowing exactly how the PSE mufflers are piped it's tough to know what the effect would be. Maybe Darin Fister has tried it?
Ideally for me, the PSE button would take it from stock to very aggressive. I either want it quiet for getting out of the neighborhood or long highway drives or I want it full-on for a spirited drive. Standard PSE isn't much louder than stock and leaves a lot to be desired.
Ideally for me, the PSE button would take it from stock to very aggressive. I either want it quiet for getting out of the neighborhood or long highway drives or I want it full-on for a spirited drive. Standard PSE isn't much louder than stock and leaves a lot to be desired.
Assuming you're talking about .2 cars, are you talking about cars with or without the center muffler? Makes a big difference.
Rennlist Member
Joined: Nov 2004
Posts: 4,411
Likes: 148
From: Prospect, KY
Yes, a GTS. Car still has the center muffler. Opinions seem mixed on how much difference deleting it makes. Maybe it’s non-PSE cars that it doesn’t help a lot? Hearing one in person would be nice but it’s pretty unlikely I’ll find a .2 X51 car around with the bypass. Thanks for the tip.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 146
Likes: 9
From: Raleigh, NC
Yes, a GTS. Car still has the center muffler. Opinions seem mixed on how much difference deleting it makes. Maybe it’s non-PSE cars that it doesn’t help a lot? Hearing one in person would be nice but it’s pretty unlikely I’ll find a .2 X51 car around with the bypass. Thanks for the tip.