Bob Rosadini Posted June 8 Share Posted June 8 At friends shop Friday and a Maverick, AWD was up on a lift. So in checking it over I found this on the exhaust pipe about 12-15" from the tip. Assuming it has something to do with exhaust tone. Appears solid-push on it and a bit deflexion Any thoughts? Quote Link to comment Share on other sites More sharing options...
HotRunrGuy Posted June 8 Share Posted June 8 (edited) 24 minutes ago, Bob Rosadini said: At friends shop Friday and a Maverick, AWD was up on a lift. So in checking it over I found this on the exhaust pipe about 12-15" from the tip. Assuming it has something to do with exhaust tone. Appears solid-push on it and a bit deflection Any thoughts? Not too far into the initial 2022 model year, they replaced the traditional resonator with that screen. Been like that ever since. HRG Edited June 8 by HotRunrGuy Quote Link to comment Share on other sites More sharing options...
Bob Rosadini Posted June 9 Author Share Posted June 9 7 hours ago, HotRunrGuy said: Not too far into the initial 2022 model year, they replaced the traditional resonator with that screen. Been like that ever since. HRG HRG..thx..that had to be a good cost saver. I guess it makes no difference if it is upstream of muffler or down. Quote Link to comment Share on other sites More sharing options...
twintornados Posted June 9 Share Posted June 9 (edited) https://www.asme.org/topics-resources/content/shrinking-exhaust-resonator-new-automotive-design Quote “What we needed to do was to find a way to let the energy from the acoustic wave pass through an opening in the pipe without making any noise or letting out any gases.” Strob said. He eventually hit on an idea: an array of 1,200 microperforations 70 microns wide (equivalent to two sheets of tinfoil) and 2 mm long. Although tiny, they were large enough to dissipate the energy in an acoustic wave. Yet, when gas tried to escape through them, the friction it generated created a barrier that confined the gas within the exhaust pipe. Edited June 9 by twintornados 5 Quote Link to comment Share on other sites More sharing options...
Bob Rosadini Posted June 9 Author Share Posted June 9 6 hours ago, twintornados said: https://www.asme.org/topics-resources/content/shrinking-exhaust-resonator-new-automotive-design TT, Thx, interesting that these guys have never encountered one of these before...then again they get a lot of commercial/farm equipment. And a lot of it in the "rode hard, put away wet" class-including high mileage foreign vehicles that I assume the current owners cannot afford taking to the dealer😎 1 Quote Link to comment Share on other sites More sharing options...
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