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  1. #1
    Join Date
    Oct 2014
    Location
    DFW, Texas
    Posts
    383
    Country Flag: United States

    Have you used Helmholtz Resonators? Exhaust Drone

    I have a moderate 2,000rpm drone that I'd like to get rid of. Calculations to cancel 1/4 of the wavelength at that frequency (133Hz) looks to come right around 24".

    While packaging 24" resonators along the side of my 3" exhaust won't be easy, I think I'd like to try it.


    Have you used these style resonators before? What was your end result?
    Click image for larger version. 

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    Supporting info

    J-tube Vendor
    http://synapseengineering.com/synaps...3eb26nmm54fu62



    Synapes installation
    http://synapseengineering.com/suppor...ons_111513.pdf

    Grassroots thread
    https://grassrootsmotorsports.com/fo.../129212/page1/

    Calculation details
    https://www.performancetrucks.net/fo...-drone-489463/
    1972 Plymouth 'Cuda - Not LS-swapped, 5.7L Hemi [MS3 Gold Box], T56 Magnum 6-speed - 'Cuda Build Page
    1976 Dodge D100 - Warlock
    2016 Subaru WRX - E30 Tune