Vault BA5 • Helmholtz Resonator Example

So that 2.25" exhaust I made for my daily driver Accord in post 11017 has been bugging me since I made it. It has had a loud drone that peaks around 3300rpm, which sucks because that is a typical cruise rpm.

I was on the verge of buying a more restrictive stock style muffler because there is no room under the car to fit more inline resonators, but I decided to do some googling first. I found this thread and I decided to try making a Helmholtz resonator before throwing more parts and money at it.

I used excess materials from when I built the exhaust so I didn't have to spend any extra money to experiment with this. Here it is:
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.



Sooo, results?

Fucking good!


The Helmholtz resonator completely transformed the exhaust! It worked way better than I was expecting. I thought it was only going to target around 3300rpm but I swear it also sounds better at idle as well.

It went from loud with an annoying drone, to a more aggressive version of the stock exhaust and no drone. All it took was a little more tube. Highly recommend trying one of these if you have a drone in your exhaust that you want to fix.

Statistics: Posted by MustardCat — 12 Jan 2019, 18:32

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