Another Drone Thread
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
I had intended to do that but slip them off first to apply some sealant but each joint has been tack welded (1" long tacks) so I will have to attack them with a grinder first.
According to the B&B site their mufflers already incorporate a Helmholtz resonator but I'm thinking given the limited length of the muffler perhaps the tuned length is not sufficient, its hard to see what is what in their site pics.
According to the B&B site their mufflers already incorporate a Helmholtz resonator but I'm thinking given the limited length of the muffler perhaps the tuned length is not sufficient, its hard to see what is what in their site pics.
Last edited by Haggisbash; Oct 13, 2019 at 05:10 PM.
Former Vendor
Joined: Jan 2015
Posts: 412
Likes: 64
Already did, not really much room on these cars for that, and that could get pricey quick.
I'm not spending a bunch of money to make these work, for the very reasons you stated. The only cost items will be the hangers(should be done anyways, regardless of what exhaust I run), and an h-pipe, which should be pretty cheap. Beyond that, no more cash trying to make these work.
Dynomat is one way to mass load, but effectiveness can vary, at least in my experience. Mass loading is usually done in layers, typically you'll have a dense foam layer, and a thinner rubber or vinyl layer. Second Skin Audio makes some good, but pricey stuff. I layered the rear trunk area in my Volt with it, and it killed all the road noise that was coming from that area. I've got some left over, plus a Dynomat equivalent, so that was paid for last year. Basically it's eliminating the surface's resonant frequency, and performing some general sound deadening at the same time. I was going to do this anyways for road noise, so it should help a bit, but it won't solve the issue.
I'm not spending a bunch of money to make these work, for the very reasons you stated. The only cost items will be the hangers(should be done anyways, regardless of what exhaust I run), and an h-pipe, which should be pretty cheap. Beyond that, no more cash trying to make these work.
Dynomat is one way to mass load, but effectiveness can vary, at least in my experience. Mass loading is usually done in layers, typically you'll have a dense foam layer, and a thinner rubber or vinyl layer. Second Skin Audio makes some good, but pricey stuff. I layered the rear trunk area in my Volt with it, and it killed all the road noise that was coming from that area. I've got some left over, plus a Dynomat equivalent, so that was paid for last year. Basically it's eliminating the surface's resonant frequency, and performing some general sound deadening at the same time. I was going to do this anyways for road noise, so it should help a bit, but it won't solve the issue.
Please also note that if the system is new, it will take ~1000 miles of driving for the packing material in the mufflers to become heat cycled. During this period, you can experience some resonance before they are fully broken in. If you are still experiencing it after trying the methods above, please give our customer support line a call at 1-800-990-0905.
