db at 70mph cruise

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Apr 23, 2011 | 04:16 PM

Randy_medion

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db at 70mph cruise

Hi, does anyone know if theres any difference in decibels between the LS2 and LS3 when your cruising @ 70mph? Wich engine is the noisiest?

Apr 23, 2011 | 06:53 PM

Gearhead Jim

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From: Far NW 'burbs of Chicago

St. Jude Donor '13

Even when closed, I think the NPP exhaust on our 2009 LS3 is slightly louder than the exhaust that came on our 2006 LS2. But the difference is not much.

Jul 18, 2011 | 01:24 AM

okaythen

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anyone know the crusing decibel level for z06?

Jul 18, 2011 | 10:43 AM

Who Needs Turbo

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Car & Driver measures the 70MPH cruising dB sometimes. Could only find one model with this test result listed, though...

2008 Corvette Coupe (LS3) = 73 dB

Jul 18, 2011 | 11:23 AM

okaythen

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From: Nevada

http://www.insideline.com/chevrolet/...and-video.html

z06 carbon 75db
c5 z06 77db
grand sport 72

hmmm 75db...I guess it's not that noisy

Jul 18, 2011 | 12:52 PM

Randy_medion

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I found out that the LS2 is also 72db, but at 75mph, it was from a German magazine and the brand new Porsche 997 s was about 74db at 75mph

Jul 18, 2011 | 01:56 PM

okaythen

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From: Nevada

I was thinking that 75 might be too noisy....but I guess sports cars they are all noisy at highway then..

anyone know the decibel level for z06 after you change the tires? I would like that know that

Jul 18, 2011 | 01:57 PM

Randy_medion

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yeah, at idle the new porsche made less noise but on the highway a little more than the base Vettes

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Jul 18, 2011 | 02:01 PM

Randy_medion

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Quote:

Originally Posted by okaythen

non runflats are defenitely quieter, I had Michelin PS2's but only for the fist few thousand miles, after that they will make just as much noise as the runflats, but yeah I guess new PS2's are generally quieter, but more unstable at 150+...P.S I think a Z06 will make more noise than the base model no matter what you do, probably because of the wider tires

Jul 18, 2011 | 06:13 PM

#10

TMyers

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From: Everett Wa

It is the tires that make the noise. I don't hear the engine. If you really want a whine put on R888's. My stone's are quiter than the goodyears though.

Jul 19, 2011 | 10:45 AM

#11

Malco

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From: Monroe, NC

Quote:

Originally Posted by Randy_medion

Hi, does anyone know if theres any difference in decibels between the LS2 and LS3 when your cruising @ 70mph? Wich engine is the noisiest?

OK I just took some readings this morning with my Radio shack sound pressure meter. Set in the A weighting.
I have a 2007 Mn Coupe, but I installed NPP mufflers which when closed are a little nosier than stock.
At 70 mph in 6 th gear I got between 72 and 73 db.
I have non run flat Nitto Invos on the car now. Within the next day or so I am changing to Michelin AS-ZP tires and I will take some more readings then.

Jul 19, 2011 | 11:57 PM

#12

Malco

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From: Monroe, NC

I just changed the tires to the Michelin AS+ZPs and took another reading on the same stretch of road. This time I got 71-72db reading.

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