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| The Pub For General Automotive Related Talk |
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20-08-2020, 08:47 AM
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#1 | ||
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Banned
Join Date: Apr 2014
Posts: 638
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I dropped the twin rear mufflers on my aurion to see how it sounded, and surprisingly these engines sound quite nice, and a perfect loudness. Was happy to get straight pipes made up in there place, until I realized there was a sonic boom at roughly 2300rpm under load which is pretty deafening.
At first was thinking couple large resonators but am worried will kill the sound too much. So then maybe a couple hotdogs, but worried they won't do anything. Came across the j pipe theory of removing drone & want to do a combo of hotdogs & jpipes but I'm a bit confused how to work out the correct specs for the jpipes. Can anyone help? |
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20-08-2020, 09:26 AM
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#2 | ||
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Banned
Join Date: Apr 2014
Posts: 638
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OK finally found a good calc to work it out for anyone looking to do the same
https://www.performancetrucks.net/fo...-drone-489463/ In my case, I worked out the frequency to be 115hz @ 2300rpms on a v6, so I need a 29" jpipe 🙂 |
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20-08-2020, 12:33 PM
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#3 | ||
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FF.Com.Au Hardcore
Join Date: Nov 2006
Posts: 1,128
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It sounds like you are building Helmholtz resonator .
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20-08-2020, 01:42 PM
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#4 | ||
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Banned
Join Date: Apr 2014
Posts: 638
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Has anyone here had success with these?
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Using "J pipes" to remove drone
Linear Mode
