Road Noise

[rooty-j]

Starting a fresh thread on road noise. Yes, it's related to my OEM Pirelli Scorpion Zero tires, looking forward to switching those out. What I'm talking about is road noise at highway speeds. It's more noticeable above about 60 mph and varies a lot based on the texture of the highway. Even over the quietest texture, it's still too much for me.

Short video and tapping: photos.app.goo.gl/CgRjiGUYhGZagwFo7

I pulled up the front carpet a little, near front foot well, and there's a lot of thick padding and extra sound absorbing material, but I only got a tiny peek here. My hunch is that most of the noise is coming from the back of car.

In the rear, there's some sound treatment under the rear cargo storage area. You'll see what looks like factory CLD, though it's very brittle and stiff. I can't imagine it's really doing anything. Attached to the carpet, is a combination of closed cell foam and sound absorbing material. I started tapping around this central area, and it was exceptionally noisy. I don't think the factory CLD material is doing anything.

The other culprit, I believe, is the sides of the rear cargo area. There is essentially an open airspace on the driver side, where there's exposed sheet metal under the Jack and the surrounding side area, that leads to an open airspace into the cargo storage area. I can't see as much on the passenger side but I assume it's the same.

I haven't decided on anything just yet, but I'm inclined to add CLD + sound absorption, like Resonix, or go Second Skin (CLD + Luxury Liner), which is a CCF/MLV combo.

Thanks for any ideas, comments, or inspiration.

 

[rooty-j]

I popped this little panel off on the driver's side. Wow, just open fender wells passing sound goodies all over the damn place. There is some sound absorption in some places, but nothing on top of this little panel. My first remedy attempt will be coating the wheels from the outside in this. secondskinaudio.com/sound-deadening/spectrum-liquid

 

[rooty-j]

Last up. I was able to see the floor carpet is in split into two sections - cargo to back of 2nd row, 2nd row to front footwell. The last picture shows the break in the middle, showing more of the marginal factory CLD. I was worried that the carpet might extend upwards behind the firewall, but all in all, it doesn't look too bad to pull the whole carpet to deal with proper sound treatment.

 

[vinylhaircut]

Or, maybe just turn on a podcast or some tunes?

Just kidding of course. Do as you please, but your ears must be a LOT better than mine. I don't find road noise to be a problem whatsoever.

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[Senator20]

If it is the tires, what is the point of pulling panels?

 

[rooty-j]

On tires, that's a fair point that different tires could make enough of a difference that I'm satisfied. I suppose if I can find a tire sale in the near future, maybe 800 bucks for a nice set of michelins or whatever is well rated for low noise is a worthwhile experiment. I just hate to replace tires that I hope to get another 20,000 miles out of. But I could probably spend that much on noise treatment and giant struggle of install.

 

[Senator20]

If you are 100% it is the tires I would just cut your losses and buy new tires if it is bothering you that much.

 

[rooty-j]

These seem to get very good reviews for low road noise.

SCORPION AS PLUS 3 - SIZE: 245/50R20

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[Senator20]

These seem to get very good reviews for low road noise.

SCORPION AS PLUS 3 - SIZE: 245/50R20

I have those on mine, I like the way they ride.

 

[arcom]

It's the tires, I'll wager. Run flats are notoriously noisy due to their very stiff sidewalls plus the Telluride's spacious interior, especially with the seats folded, just aggravates things.