hjtrbo Bronze Donating Members 309 Member For: 13y 3m Posted 30/04/22 02:19 AM Share Posted 30/04/22 02:19 AM Hey gang, FG turbo ute. Running Manta 4" dump, into custom catless single section 3.5" (the red circle), then into the Manta twin 2.5" system out to the back. FG XR6 Turbo Ute 2.5in Dual Turbo Back - MPI Automotive Around 1900 to 2400 I have this nasty resonant rasp type sound very clearly coming from the back as opposed to hearing it up through the floor. Windows down driving up a narrow high walled street is extra noticeable. Bloody sounds terrible and reminds me of a p-plater in a V6 commo with muffler deletes. Everywhere else sounds good. I'm not sure if its vibration / resonance of the tail pipe section as that's unsupported and have some distance from the rear muffler outlet to the tips. How long is a piece of string I get that.... But anyone that has been there done that have any ideas that I could try? Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,116 Member For: 9y 2m 21d Gender: Male Location: South Australia Posted 30/04/22 09:32 AM Share Posted 30/04/22 09:32 AM Twin 2.5 inch can get in the bin. Now I've got that out the way.... Chuck a resonator in the 3.5 inch part. There's not much else you can do without it costing an arm and a leg. Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 309 Member For: 13y 3m Posted 30/04/22 09:38 AM Author Share Posted 30/04/22 09:38 AM @Captain Yeah Nah thanks mate, I have a 14" long hot dog laying around from a previous build that I'll shove up there and see how it goes. Out of desperation hence my reason for reaching out is I was considering changing out the rear muffler and adapting 2 x Lukey 2.5" turbo flow singles in there. Have to check clearance etc. But seems a bit drastic and another $500 down the drain. Was also thinking maybe I could put some small 6" hotdogs between the rear muffler and tips on the back, kind of like a silenced tip if that makes sense. Not fussed about volume, the quieter the better to be honest. Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,116 Member For: 9y 2m 21d Gender: Male Location: South Australia Posted 30/04/22 09:48 AM Share Posted 30/04/22 09:48 AM Yeah more of a stuff around to cut up the twin part but nothing wrong with doing that. It won't need much to sort it out. Any addition to it will make it decently quieter. 1 Link to comment Share on other sites More sharing options...
FormulaFG Donating Members 68 Member For: 9y 10m 1d Posted 01/05/22 02:26 AM Share Posted 01/05/22 02:26 AM j pipes? Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 309 Member For: 13y 3m Posted 01/05/22 02:27 AM Author Share Posted 01/05/22 02:27 AM Its not drone so dont think j pipes will work in this case??? Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,291 Member For: 16y 9d Gender: Male Location: Melbourne Posted 01/05/22 03:07 AM Share Posted 01/05/22 03:07 AM drone is generally resonance frequencies. Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 309 Member For: 13y 3m Posted 01/05/22 11:55 AM Author Share Posted 01/05/22 11:55 AM (edited) I'm familiar with drone and j-pipes. I made these and put them on my VF. Made a world of difference. What I'm experiencing now feels like a much different phenomenon. I wish I could put into words what it's like. I Edited 01/05/22 11:56 AM by hjtrbo typo Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 309 Member For: 13y 3m Posted 24/05/22 08:57 AM Author Share Posted 24/05/22 08:57 AM Installed a new 4" Manta dump in place of the factory one so I had to rebuild that centre section I mentioned in my first post. Took the opportunity to put that hot dog in. Made a little bit of difference but not enough. Going to try the turbo flow mufflers. BTW love the 3M stripping discs. Bloody magic. 1 Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,116 Member For: 9y 2m 21d Gender: Male Location: South Australia Posted 24/05/22 09:00 AM Share Posted 24/05/22 09:00 AM That dog looks cold if anything 2 Link to comment Share on other sites More sharing options...
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