Ticking/tapping Noise HPDE on RH Turns

Discussion in 'Road Course, Track, Autocross, HPDE' started by HeelToeHero, Sep 29, 2019.

  1. HeelToeHero

    HeelToeHero Well-Known Member

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    Hello all,

    I was running a lapping day Friday and could faintly hear a ticking or tapping noise on right hand turns below is a video of it and you can hear it (microphone is on the back bumper).
    Any thoughts? The frequency seems higher than wheel rotational speed (but maybe at tread block frequency) and doesn't appear to be tied with engine speed. I checked the wheel bearings on that side at the track and didn't feel any play.

    Other than that distracting noise the car ran fine.

     
  2. johnson.ba

    johnson.ba Well-Known Member

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    My gt350 was making a similar noise, originally only on left turns, then developed to right turns also, then developed into left/right/straight. The dealer moved the lugs front to back and it went away so they ordered 20 new lug nuts and the problem has not resurfaced since.
     
  3. NightmareMoon

    NightmareMoon Well-Known Member

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    Floating rotors (like on the GT350) will go tick tick tick when cornering hard
     
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    HeelToeHero

    HeelToeHero Well-Known Member

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    Thanks for the replies!

    Lug nuts is a strange one!

    I should have mentioned its a nearly stock performance pack car with non floating rotors.

    I have checked the wheel bearings for play on that side but normally they emit a growl. The noise doesn't sound significant enough to be too worrisome yet but it was a little unsettling. It would be preferable to not have something let go mid corner...
     
  5. DickR

    DickR Well-Known Member

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    FYI if my passenger seat belt isn't latched the buckle will make scary noises during autocross runs as the buckle tab bangs against seat or trim panel hard plastic. Ditto for the rear belts. if the tabs aren't secured.

    Is there any chance it is simply gravel?

    Are the lug nuts torqued to 150 lb-ft?
     
  6. PoppinJ

    PoppinJ Well-Known Member

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    Sounds like you already check the hubs so that would kinda include this. Did you check the axle nuts? 32 mm rear and 36mm front. B
    does the 32 but in the rear feel more like a 31 1/2 to anyone else. Me and my mechanic both felt like it had just a touch to much play.
     
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    HeelToeHero

    HeelToeHero Well-Known Member

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    I don't think it's from inside the vehicle. The microphone was on the outside of the vehicle and I could hear it echoing off the wall.
    The noise seems too consistent to be gravel.
    Lugs were checked and are torqued up to 150lbf-ft.
     
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    HeelToeHero

    HeelToeHero Well-Known Member

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    I have witness marks on the rear to see if the nut has started to loosen. I'll have to check and report back on that. Didn't get that far track side.
    I've never checked the front as its under the dust cap... I assume that would show up as a loose bearing.
     
  9. PoppinJ

    PoppinJ Well-Known Member

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    Youre not wrong. If the nut gets really loose you would notice it when checking your bearings. I run at the track without center caps since they melt off on me so it's easy to check the rear.
     
  10. NightmareMoon

    NightmareMoon Well-Known Member

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    Sometimes its just OPR which can cause such a ticking noise. I had that happen once with noise and a vibration and pitted to find everything was just fine.
     
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    HeelToeHero

    HeelToeHero Well-Known Member

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    I thought about this too. I would have expected to hear it on both turns though.

    I did find the outter tread blocks are a bit feathered on the left rear.
     
  12. johnson.ba

    johnson.ba Well-Known Member

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    It sounds crazy, but try moving your lug nuts from one side to the other and see if the noise moves or goes away.
     
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  13. AlbertD

    AlbertD Well-Known Member

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    Interesting... I seem to get a similar ticking noise on low speed increasing radius tight left hand turns. I also can hear it from outside the car. I initially pulled off into grid and couldn't find anything. It does it consistently, but hasn't seem to caused any problems outside of the noise. Frustrating to say the least.
     
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    HeelToeHero

    HeelToeHero Well-Known Member

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    I think it happens on any loaded turn for me. Low speed is easier to hear because the overall noise is lower (wind, engine, normal tire noise). My challenge is to be able to reliably replicate this on the street...
     
  15. DickR

    DickR Well-Known Member

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    I'm having trouble even hearing any noise that sounds potentially bad. Don't know if it is my ears, my speakers, or my ear buds.

    Is the noise a relatively quiet compared to exhaust noise "tinny stones on sheet metal" kind of sound (realizing it isn't actually stones on sheet metal)?

    I was thinking maybe Torsen "stick slip" noise, especially if you don't have stock fluid and friction modifier but you could hear that on the street and it would be a more "solid" sound from my experience even with oem fluid and friction modifier. Is there any chance it is simply a characteristic of your exhaust/muffler?
     
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