Reducing Droning of AAM shortail pipes

cinellipro · 04-07-2013, 11:23 AM

Planning on doing a muffler delete and installing a pair of AAM short tails or muffler shop pipes. My question is related to the droning, would installing Dynamat in the rear hatch area reduce the drone? Has anyone tried that?

SS_Firehawk · 04-07-2013, 02:50 PM

I don't think so. Welding a hemholtz resonator will though. But the length of the branch must be calculated to the frequency you are trying to tune out

Japanjay · 04-07-2013, 05:51 PM

People talk about the "droning" this mod has. Well yeah it has some drone if you drive around at 3.5-4k rpms, but who really drives around in that rpm band? Even at 80mph down the hwy there is no drone if you drive in the proper gear, I guess if you hang it in 5th and cruise in that area, then yeah there is some drone, but again, why would you cruise in such a high rpm range when there is another gear to drop lower into?

maro · 04-07-2013, 05:53 PM

Quote:

Originally Posted by Japanjay

People talk about the "droning" this mod has. Well yeah it has some drone if you drive around at 3.5-4k rpms, but who really drives around in that rpm band? Even at 80mph down the hwy there is no drone if you drive in the proper gear, I guess if you hang it in 5th and cruise in that area, then yeah there is some drone, but again, why would you cruise in such a high rpm range when there is another gear to drop lower into?

^^^agree

04-07-2013, 11:23 AM	#1 (permalink)
cinellipro Base Member Join Date: Jan 2012 Location: florida Posts: 102 Drives: 2009 370Z Rep Power: 13	Reducing Droning of AAM shortail pipes Planning on doing a muffler delete and installing a pair of AAM short tails or muffler shop pipes. My question is related to the droning, would installing Dynamat in the rear hatch area reduce the drone? Has anyone tried that?

04-07-2013, 02:50 PM	#2 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	I don't think so. Welding a hemholtz resonator will though. But the length of the branch must be calculated to the frequency you are trying to tune out DarkJak and Cove87 like this. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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04-07-2013, 05:51 PM	#3 (permalink)
Japanjay Track Member Join Date: Mar 2012 Location: Puyallup Posts: 856 Drives: 09 Nissan 370z MB M6 Rep Power: 14	People talk about the "droning" this mod has. Well yeah it has some drone if you drive around at 3.5-4k rpms, but who really drives around in that rpm band? Even at 80mph down the hwy there is no drone if you drive in the proper gear, I guess if you hang it in 5th and cruise in that area, then yeah there is some drone, but again, why would you cruise in such a high rpm range when there is another gear to drop lower into?