Subject	I was reading a bit about this on a random forum where one
Posted by	PiotrC70 on January 31, 2017 at 11:09 PM
	This message has been viewed 268 times.
In Reply To	Helmholtz resonators posted by BlackholeZ on January 31, 2017 at 08:18 PM
Message	guy was actually doing the math calculating exhaust temp, engine RPM of the drone or rasp and I think another factor and it came up with what size to build to cancel that set of frequencies. There was a site that someone posted a while back and their method through testing was to basically put on a 18-24" hemholtz resonator since it's more broad spectrum. 1993 TT. R.I.P. 09.15.2010
Follow Ups	Quiteing exhaust 2+0 / 2+2 - njz 13:26:18 01/31/17 Thank you ... - ConVerTT 14:04:58 01/31/17 1141 2.5". Amazon lowest price. (n/m) - njz 14:09:17 01/31/17 Re: 1141 2.5". Amazon lowest price. - njz 14:18:27 01/31/17 Re: Re: 1141 2.5". Amazon lowest price. - Smokiedabear 14:49:29 01/31/17 Re: Re: Re: 1141 2.5". Amazon lowest price. - njz 15:11:49 01/31/17 haha, maybe my ears are going bad, my rb20 was much louder - Smokiedabear 09:11:58 02/01/17 I dont know what they are called, but did you look into - LJZTT 17:11:49 01/31/17 Re: I dont know what they are called, but did you look into - njz 19:43:58 01/31/17 Helmholtz resonators - BlackholeZ 20:18:41 01/31/17 I was reading a bit about this on a random forum where one - PiotrC70 23:09:48 01/31/17 I am curious to find a documented successful application - LJZTT 02:02:11 02/01/17 There's a few people in my Nissan/Infiniti group that run - PiotrC70 09:16:14 02/01/17 not really... - vorpalZ 12:04:58 02/01/17 Simple, be a welder :-) - BlackholeZ 18:16:12 02/01/17 this guy claims it worked on his 350Z for the 2k rpm drone - LJZTT 02:11:05 02/01/17 I installed 12" Synapse No-Drone Resonators on the SZ 3" - MixManMash 03:23:28 02/01/17 I'm hoping to repeat the following procedure and report back - Jiro 00:42:26 02/01/17 There isn't any drone with the Borla back half exhaust. - Zblackbeast 10:32:40 02/01/17 likely your hi flow cats have a lot to do with it - LJZTT 16:41:05 02/01/17 Ditto for the Borla. (n/m) - josh 17:19:48 02/01/17 Glad it's quiet for you now - FrozTTy 13:48:50 02/01/17
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