canoeboy Posted October 21, 2012 Share Posted October 21, 2012 I used to own an '04 R32. If you are familiar with that car you'll know a popular mod was to add a switch that controlled the exhausts vacuum actuated "flapper" It essentially bypassed the muffler on one side and sounded great. Plus you could switch from loud to quiet whenever you want. Which brings me to my idea. Install an electric cutout valve in line with one half of the exhaust after the split, and deleting the muffler on that side. With that you could run it through the stock muffler whenever you want it quiet, and could open up the other tip when you want to let it rip a bit. What I'm not sure of is if running the exhaust through the one stock muffler would restrict things too much. or if if switching between the two would screw with the tune at all (stage 1 cobb) Any thoughts? High tech cad drawing below for clarification. http://i53.photobucket.com/albums/g80/markdeering/mufflerdeletewithcutout.jpg Link to comment Share on other sites More sharing options...
racso_dor Posted October 21, 2012 Share Posted October 21, 2012 try it out and let us know how it goes for you Link to comment Share on other sites More sharing options...
tDoug60 Posted October 21, 2012 Share Posted October 21, 2012 Subscribe I have to see if this works. Link to comment Share on other sites More sharing options...
iNVAR Posted October 22, 2012 Share Posted October 22, 2012 It'd be pointless The restriction isn't located back there. The main restrictions are located in the UP (for years that have cats in them) and the DP. Replace the DP without bothering with the catback and you've eliminated pretty much all of the exhaust restriction, until you replace the turbo with something significantly larger. https://www.google.com/search?q=exhaust+cutout+site%3Alegacygt.com Do some reading and searching. There are a handful of people that have messed with exhaust cutout options. Electric cutout: http://legacygt.com/forums/showthread.php/electric-exhaust-cutout-installed-w-pics-best-both-worldsi-163580.html And an actual thread devoted to exhaust cutouts: http://legacygt.com/forums/showthread.php/exhaust-cutout-thread-sound-and-video-64889.html edit: Oh wait, you're not asking about performance. Just noise? There are some people here who do run with only 1 muffler, BUT I believe they all have larger exhaust piping throughout also. I'd be wary of blocking off 1 side of a stock exhaust and have to manually control it. What if I were driving around in "quiet" mode and I suddenly decided to get on the throttle hard? I'd much rather have something like this personally: http://legacygt.com/forums/showthread.php/boost-activated-cutouti-169991.html Link to comment Share on other sites More sharing options...
Brett Posted October 22, 2012 Share Posted October 22, 2012 yea youtube it. search: legacy gt cutouts. or wrx cutouts. same noise. but its always after the dp Link to comment Share on other sites More sharing options...
canoeboy Posted October 22, 2012 Author Share Posted October 22, 2012 It'd be pointless The restriction isn't located back there. The main restrictions are located in the UP (for years that have cats in them) and the DP. Replace the DP without bothering with the catback and you've eliminated pretty much all of the exhaust restriction, until you replace the turbo with something significantly larger. https://www.google.com/search?q=exhaust+cutout+site%3Alegacygt.com Do some reading and searching. There are a handful of people that have messed with exhaust cutout options. Electric cutout: http://legacygt.com/forums/showthread.php/electric-exhaust-cutout-installed-w-pics-best-both-worldsi-163580.html And an actual thread devoted to exhaust cutouts: http://legacygt.com/forums/showthread.php/exhaust-cutout-thread-sound-and-video-64889.html edit: Oh wait, you're not asking about performance. Just noise? There are some people here who do run with only 1 muffler, BUT I believe they all have larger exhaust piping throughout also. I'd be wary of blocking off 1 side of a stock exhaust and have to manually control it. What if I were driving around in "quiet" mode and I suddenly decided to get on the throttle hard? I'd much rather have something like this personally: http://legacygt.com/forums/showthread.php/boost-activated-cutouti-169991.html Yes, it's for sound only. I've read an exhaust on these cars is mostly for sound only until you really starting building for power. And I wouldn't do it if I couldn't drive normally with just running the one side (ie. I wouldn't want to HAVE to switch it on just to step on it) . That's what I was worried about, I think it's only a 2" pipe or so for the stock piping after the split and that it would be to restrictive. Link to comment Share on other sites More sharing options...
Brett Posted October 22, 2012 Share Posted October 22, 2012 well a tbe can go a pretty long way even for a stock lgt. combined with a good tune should get you about 40+whp gains over stock. Link to comment Share on other sites More sharing options...
fahr_side Posted October 22, 2012 Share Posted October 22, 2012 well a tbe can go a pretty long way even for a stock lgt. combined with a good tune should get you about 40+whp gains over stock.... all of which comes from the downpipe and tune. Fixed. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
specialB Posted October 22, 2012 Share Posted October 22, 2012 Why not just get an ewg and call it a day? Then again that is a much pricier option but you do get power gains! And holy hell is it loud Sent from my DROID RAZR using Tapatalk 2 Link to comment Share on other sites More sharing options...
fahr_side Posted October 22, 2012 Share Posted October 22, 2012 Why not just get an ewg and call it a day?.... holy hell is it loud Because you can't turn an EWG on or off? OP specifically wants to be able to make noise, or stay stealth. Personally I'd spend the money on making the car quicker and leave the noise to the ricers, but that's just me. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
PrimeRib Posted October 22, 2012 Share Posted October 22, 2012 Illegal in most states. Seems like a lot of effort to make your car sound broken. Link to comment Share on other sites More sharing options...
Brett Posted October 22, 2012 Share Posted October 22, 2012 Because you can't turn an EWG on or off? OP specifically wants to be able to make noise, or stay stealth. Personally I'd spend the money on making the car quicker and leave the noise to the ricers, but that's just me. but the sound of the boxer is too good to pass up. i have hogzaust right now, and it might be a while before i take the washers out. but at least i made up my mind whether or not to get a catback. i just cant decide on what brand. i think the invidia sounds pretty damn good Link to comment Share on other sites More sharing options...
dingbang Posted October 22, 2012 Share Posted October 22, 2012 EWG off = don't punch it EWG on = punch it I actually make better use of a tank of gas b/c now I am very aware of when I'm going deep in the throttle...and that sounds dirty. Link to comment Share on other sites More sharing options...
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