Best Tire For Reduced Noise
05-07-2017, 07:41 PM
#18
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05-07-2017, 11:34 PM
#19
Burning Brakes
That's not to say that there aren't differences between tires in performance and comfort. But they are best evaluated by those who can compare new tires to new tires.
05-08-2017, 08:49 AM
#21
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I agree. My car on an average highway surface (so not new fresh smooth asphalt) shows 93db at 100 km/h. That is about the same volume level as flying on a 737 jet airliner. My BMW 5 series had an interior reading of 83 on the same stretch of road.
As much as I've been in love with the idea of owning a 911 for decades, I find the combination of interior "drone" from the rear of the car at 2,200 RPM (where the car seems to spend a lot of its time in city driving) and the tire roar, to be too much for my tinnitus.
If blocked symposers and quieter tires can bring the noise levels down, I'd be OK, otherwise this car will get traded for a Panamera.
As much as I've been in love with the idea of owning a 911 for decades, I find the combination of interior "drone" from the rear of the car at 2,200 RPM (where the car seems to spend a lot of its time in city driving) and the tire roar, to be too much for my tinnitus.
If blocked symposers and quieter tires can bring the noise levels down, I'd be OK, otherwise this car will get traded for a Panamera.
05-08-2017, 12:56 PM
#22
Rennlist Member
On OPs original question, I'm going to be replacing my 75% worn P-Zeros with Michelin P4S's at the end of next week since the P-Zeros have gotten too slippery even with tread remaining. As part of prepping for the change, I've taken DB readings in the car using an iPhone app using a setting that claims to mimic the sound response of the human ear. I've taken the readings with the car in Normal mode, windows up, radio off, PSE off, PASM off, AC/Fan off, and seat cooling off. I took the readings on two types of pavement at a known speed and location. I'll duplicate the same experiment on the same road stretches with the new 4S's as soon as I have them. Of course, its not the same as comparing all new tires for both, but I figure it would be interesting nonetheless.
Here's what I have so far with the old P-Zeros:
Fresh high-traction high-porosity asphalt (the new mix that reduces water retention and hydroplaning) at 70mph: 88.4 DB average.
Old asphalt in good condition with minimal tar strips at 65mph: 74.8 DB average
I'll update as soon as I have the new tires/wheels on. Of course, the absolute DB readings aren't by themselves that meaningful since who knows how good an iPhone app can do this, but using the same app before and after will at least provide good relative results.
05-08-2017, 01:40 PM
#23
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I've taken DB readings in the car using an iPhone app using a setting that claims to mimic the sound response of the human ear. I've taken the readings with the car in Normal mode, windows up, radio off, PSE off, PASM off, AC/Fan off, and seat cooling off. I took the readings on two types of pavement at a known speed and location. I'll duplicate the same experiment on the same road stretches with the new 4S's as soon as I have them. Of course, its not the same as comparing all new tires for both, but I figure it would be interesting nonetheless.
05-08-2017, 02:33 PM
#24
Three Wheelin'
Ps4-$1550 Canadian.
05-08-2017, 02:43 PM
#25
Advanced
I just replaced the Pirelli's to the new Michelin Pilot Sport 4s on my C4. So far the difference is amazing.... the car is quieter, rides better and doesn't "hunt" for road groves. Don't know how it does with rain yet but my PZeros were LETHAL in the rain so I can only hope these are better.
05-08-2017, 04:07 PM
#27
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Another aside: At the IMSA races at COTA this weekend I got to listen to a short talk by a guy from Michelin engineering. He said the engineering team hated the "4S" name for the tire... one reason being that they thought many would think it was an all-season tire at a glance. But the marketing guys apparently got their way. I don't get the 4 part of it either, although it makes it easy to remember what tire I have on my 4S.
Addition: And oh yeah, he said that the Pilot 4S also has lower rolling resistance that the prior models for better economy and performance.
Addition: And oh yeah, he said that the Pilot 4S also has lower rolling resistance that the prior models for better economy and performance.
05-08-2017, 04:52 PM
#28
Three Wheelin'
Another aside: At the IMSA races at COTA this weekend I got to listen to a short talk by a guy from Michelin engineering. He said the engineering team hated the "4S" name for the tire... one reason being that they thought many would think it was an all-season tire at a glance. But the marketing guys apparently got their way. I don't get the 4 part of it either, although it makes it easy to remember what tire I have on my 4S.
First, it’s important to clarify the somewhat perplexing name of the new Michelin tire. The ‘4S’ in PS4S does not mean it’s a four-season (all-season) tire. The PS4S is Michelin’s 4th-generation Pilot Sport UHP summer tire, carrying on the legacy of the original Pilot Sport, the Pilot Sport PS2 and the Pilot Super Sport. To add to the confusion, Michelin also has the new Pilot Sport 4. That tire doesn’t hold the same ultimate performance focus as the PS4S and is exclusively a European-market tire, outside of a handful of OEM applications. That’s why there is an ‘S’ in ‘PS4S,’ signifying a level of performance beyond the Pilot Sport 4, similar to Porsche’s badging scheme for the 911 Carrera S versus the standard 911 Carrera.
http://www.automobilemag.com/news/mi...t-super-sport/
05-08-2017, 05:06 PM
#29
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