- Joined
- Sep 1, 2016
- Threads
- 22
- Messages
- 375
- Reaction score
- 182
- Location
- Melbourne, Australia
- Website
- sophistijeep.blogspot.com
- Vehicle(s)
- MY2014 JKU Overland (RHD) A/T, Mercedes E-class MY2017
- Banned
- #16
That's called induction noise and you hear it when the engine is under load. Exhaust and its noise comes from your tailpipe. In a Wrangler, changing the air intake has no connection to exhaust noise because the muffler is very quiet. Even a positive displacenent supercharger which seals up the intake behind rotors that act like revolving doors and force feed more air doesn't make the stock exhaust any louder or different.Can’t speak to the 3.6 Pentastar but I added a long tube air inlet and a K&N cone filter on my FX35 and it had a significant impact on the exhaust sound. Made it more throaty and loud.
In your other vehicle, the cone filter and the length of the inlet tube had very little to do with the throaty sound. Stock air intakrs (and even some aftermarket ones) have Helmholtz style resonators that smoothen out the pulses and therefore the noise. The inlet tube material might make a tiny difference depending on its sound absorption properties. E.g. metal one would make it sound a bit tinny and a plastic one makes it absorb some the high frequency noises and therefore makes it sound less tinny. The presence/absence of an airbox also makes a bit
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