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Helmholtz Resonator? by White 84 SE
Started on: 07-24-2014 02:44 PM
Replies: 5 (235 views)
Last post by: Zac88GT on 07-26-2014 11:14 AM
White 84 SE
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Report this Post07-24-2014 02:44 PM Click Here to See the Profile for White 84 SEClick Here to Email White 84 SESend a Private Message to White 84 SEEdit/Delete MessageReply w/QuoteDirect Link to This Post
Anyone try or know anything about Helmholtz resonators. I heard they can give power and dampen sound a little. Seems like something the Duke can especially use. Where would they be connected? Apparently they can be tuned to resonate at particular frequencies..say at cruising RPM etc.

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Report this Post07-24-2014 09:13 PM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
They don't do anything for power and use sound cancellation to reduce cruise rpm drone common with 3" or larger exhausts.

the hard part is finding room to route a 26"+ section of pipe for the resonator.

I need to measure, but I think there is 26"+ of pipe on the passenger outlet of my magnaflow muffler. If there is I could install an electric cutout on that pipe and reduce the cruise rpm drone. Or just cut the trunk and install the vibrant performance ultra quiet resonator (used it on my last swap with a very similar exhaust setup) and it was drone free.
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Will
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Report this Post07-25-2014 08:01 AM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
Helmholtz resonators are also used to cancel out intake noise.

You *CAN* design an intake plenum and ram-tube to operate as a Helmholtz resonator if you have 4 or fewer cylinders pulling from the plenum. It can boost torque at one RPM point, but will ALWAYS reduce torque at another RPM point.
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White 84 SE
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Report this Post07-25-2014 08:33 AM Click Here to See the Profile for White 84 SEClick Here to Email White 84 SESend a Private Message to White 84 SEEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Will:

Helmholtz resonators are also used to cancel out intake noise.

You *CAN* design an intake plenum and ram-tube to operate as a Helmholtz resonator if you have 4 or fewer cylinders pulling from the plenum. It can boost torque at one RPM point, but will ALWAYS reduce torque at another RPM point.


oh... Thanks Will!

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Will
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Report this Post07-25-2014 09:53 AM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
You can probably find a photo of an exhaust helmholtz chamber if you look at photos of 350Z exhaust systems.
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Zac88GT
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Report this Post07-26-2014 11:14 AM Click Here to See the Profile for Zac88GTClick Here to visit Zac88GT's HomePageClick Here to Email Zac88GTSend a Private Message to Zac88GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
The Mazda K series V6's use a helmholtz intake manifold with 3 different chambers that it switches between.
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