TheMonaLisa Posted March 2, 2015 Share Posted March 2, 2015 Current exhaust mods: Grimmspeed UP, Cobb DP, Magniflow CBE I pretty happy with the in car volume of the exhaust in the front two seats but my back seat passangers cringe at 2500 rpm. Was thinking about adding a small resonator. Has anyone dealt with the drone issues? Link to comment Share on other sites More sharing options...
06leg315 Posted March 2, 2015 Share Posted March 2, 2015 I have a vibrant resonator before the rear diff and it made quite a difference. Granted I'm not boosted unfortunately but I think you'd get the same effect Link to comment Share on other sites More sharing options...
TheMonaLisa Posted March 2, 2015 Author Share Posted March 2, 2015 I'm not looking to quiet the car, just reduce the drone Link to comment Share on other sites More sharing options...
06leg315 Posted March 2, 2015 Share Posted March 2, 2015 Ya the volume was only slightly different but the drone and bit of rasp was gone Link to comment Share on other sites More sharing options...
MrTris Posted March 2, 2015 Share Posted March 2, 2015 [ame=http://www.amazon.com/Vibrant-1141-Ultra-Quiet-Resonator/dp/B000E3VHWI/ref=sr_1_sc_2?ie=UTF8&qid=1425324508&sr=8-2-spell&keywords=vibrant+ultra+resontor]Amazon.com: Vibrant 1141 2.5" Ultra Quiet Resonator: Automotive[/ame] This is a mustache with titties, right here. This is what you want. Link to comment Share on other sites More sharing options...
chato Posted March 2, 2015 Share Posted March 2, 2015 if you check out the reviews on[ame=http://www.amazon.com/Vibrant-1142-Ultra-Quiet-Resonator/dp/B001806YE2/ref=sr_1_1?ie=UTF8&qid=1425325782&sr=8-1&keywords=vibrant+3in] this guy[/ame], there's actually someone with a before and after LGT vid. Link to comment Share on other sites More sharing options...
K2e2vin Posted March 2, 2015 Share Posted March 2, 2015 Helmholtz resonators like: http://i352.photobucket.com/albums/r347/Hydrofluoric_Acid/TDX/350Z%20TDX/TDX2-16.jpg http://www.camaro5.com/forums/attachment.php?attachmentid=168858&stc=1&d=1285949587 They can be tuned to kill drone at certain RPM and shouldn't affect anything else. I've heard twin-loop mufflers or "j-turn" piping helps too. Link to comment Share on other sites More sharing options...
TheMonaLisa Posted March 2, 2015 Author Share Posted March 2, 2015 http://tapatalk.imageshack.com/v2/15/03/02/fe1f1ea48196df8b48100ab7e3e07d88.jpg Think this in 12" or 18" would do? http://vibrantperformance.com/catalog/index.php?cPath=1022_1033 Link to comment Share on other sites More sharing options...
06leg315 Posted March 2, 2015 Share Posted March 2, 2015 http://tapatalk.imageshack.com/v2/15/03/02/fe1f1ea48196df8b48100ab7e3e07d88.jpg Think this in 12" or 18" would do? http://vibrantperformance.com/catalog/index.php?cPath=1022_1033 That's the exact one I have Link to comment Share on other sites More sharing options...
TheMonaLisa Posted March 2, 2015 Author Share Posted March 2, 2015 what length do you have? Link to comment Share on other sites More sharing options...
MrTris Posted March 2, 2015 Share Posted March 2, 2015 what length do you have? That's a little personal, don't you think? Link to comment Share on other sites More sharing options...
06leg315 Posted March 2, 2015 Share Posted March 2, 2015 Well I ordered one that was advertised as 20 but the box was 20 lol. Eended up being like 14 long but still did just what I wanted Link to comment Share on other sites More sharing options...
06leg315 Posted March 2, 2015 Share Posted March 2, 2015 http://vibrantperformance.com/catalog/product_info.php?cPath=1021_1033_1054&products_id=291 I suggest buying on amazon. Cheaper. But this is what I got. Link to comment Share on other sites More sharing options...
JayInVA Posted March 2, 2015 Share Posted March 2, 2015 Well I ordered one that was advertised as 20 but the box was 20 lol. Eended up being like 14 long but still did just what I wanted Yeah, typical guy... adding a few inches. Link to comment Share on other sites More sharing options...
TheMonaLisa Posted March 2, 2015 Author Share Posted March 2, 2015 That's a little personal, don't you think? Cant believe I missed that. Link to comment Share on other sites More sharing options...
TheMonaLisa Posted March 3, 2015 Author Share Posted March 3, 2015 Leaning towards the 12" one (9.5" resonator) Copping Cobb's 2015 Sti exhaust. Link to comment Share on other sites More sharing options...
06leg315 Posted March 3, 2015 Share Posted March 3, 2015 I have a 2015 wrx mid pipe (modified slightly plus added resonator) and the dual tip mufflers. Looks pretty bad ass Link to comment Share on other sites More sharing options...
wicknetzel Posted March 3, 2015 Share Posted March 3, 2015 I have a 2015 wrx mid pipe (modified slightly plus added resonator) and the dual tip mufflers. Looks pretty bad ass Do you have any pics of this or links to a thread about doing it? I prefer the quiet tone of the stock exhaust for my daily, but I miss the quad tip I had on my 2012 wrx. I've been debating modifying a stock wrx/sti exhaust getting unloaded for cheap. Link to comment Share on other sites More sharing options...
06leg315 Posted March 3, 2015 Share Posted March 3, 2015 I'm out of work for another week because of surgery but when I'm back ill put it on the lift AMD show you the whole thing. I also made a custom mid pipe so I have a straight pipe from front cat to stock 2015 wrx mufflers with that resonator in the mid pipe I just cut a section out. The mufflers for me took some modification to the hangers. TheThe muffler bodies were same size so I just cut them off and re welded them on in my location. Rear bumper needed to be trimmed a hair on the inside tho and u don't even see it from out side car even at ground level. I post from my phone so I'll havto get pics and upload then on my laptop Link to comment Share on other sites More sharing options...
wicknetzel Posted March 3, 2015 Share Posted March 3, 2015 I'm out of work for another week because of surgery but when I'm back ill put it on the lift AMD show you the whole thing. I also made a custom mid pipe so I have a straight pipe from front cat to stock 2015 wrx mufflers with that resonator in the mid pipe I just cut a section out. The mufflers for me took some modification to the hangers. TheThe muffler bodies were same size so I just cut them off and re welded them on in my location. Rear bumper needed to be trimmed a hair on the inside tho and u don't even see it from out side car even at ground level. I post from my phone so I'll havto get pics and upload then on my laptop Did the y-pipe work as it was? Link to comment Share on other sites More sharing options...
06leg315 Posted March 3, 2015 Share Posted March 3, 2015 When I put the resonator in I cut a section out a half inch shorter than resonator that way pipe became half inch longer. That got me away from the sway bar. I was about 1/8 inch before and it rattled bad. Also on the pass side muffler I welded the side mount on with the hook part a half inch closer to muffler body which pulled the whole rear exhaust assy over to the pass side a half inch which took care of the rattle I had on the driver side muffler heat shield. Link to comment Share on other sites More sharing options...
baconbits Posted March 4, 2015 Share Posted March 4, 2015 Current exhaust mods: Grimmspeed UP, Cobb DP, Magniflow CBE I pretty happy with the in car volume of the exhaust in the front two seats but my back seat passangers cringe at 2500 rpm. Was thinking about adding a small resonator. Has anyone dealt with the drone issues? Working in product development for an exhaust company, these threads are... interesting. I've never really figured out how people define a resonator versus a muffler. Technically, they're all mufflers so... what makes one a resonator and another a muffler? Given the design of a Helmholtz and quarter wave (below), the "resonators" people typically put in the tunnel are just glass (or steel wool) packed mufflers just like the rear mufflers for most kits available for our cars, only packaged differently to fit. Helmholtz resonators like: http://i352.photobucket.com/albums/r347/Hydrofluoric_Acid/TDX/350Z%20TDX/TDX2-16.jpg http://www.camaro5.com/forums/attachment.php?attachmentid=168858&stc=1&d=1285949587 They can be tuned to kill drone at certain RPM and shouldn't affect anything else. I've heard twin-loop mufflers or "j-turn" piping helps too. Top one is a Helmholtz Resonator of questionable effectiveness (small chamber, short tube). The bottom one is just a quarter wave resonator as it doesn't have a chamber at the end. Link to comment Share on other sites More sharing options...
K2e2vin Posted March 4, 2015 Share Posted March 4, 2015 Those were quick pictures I found on google; the one I was looking for was what I found a few years ago where the guy made them adjustable. I guess this is more of a proper one: http://www.camaro5.com/forums/picture.php?albumid=9881&pictureid=77412 Design notes and calculations in his post: http://www.camaro5.com/forums/showthread.php?t=102075&page=14 Link to comment Share on other sites More sharing options...
boxman Posted March 4, 2015 Share Posted March 4, 2015 That weld...ugh... Link to comment Share on other sites More sharing options...
Bob in Chicago Posted March 9, 2015 Share Posted March 9, 2015 I installed Vibrant 3” UltraQuiet resonator to replace my Invidia resonator, resulting in a much better, less droning sound. See it at Summit: http://www.summitracing.com/parts/vpe-1142 Link to comment Share on other sites More sharing options...
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