Reduced Tire Noise 25% by accident

Who Knows · 05-08-2010, 11:21 AM

Everyone here knows how noisey these cars are---I changed all of the following at the same time: 15mm spacers front, 20mm spacers rear, Eibach
springs, Adjustible upper front control arms, rear adjustable camber arms. I really, really like how the car looks and handles/ much better than stock but the neatest thing about all of this is my car is at least 25% or really closer to 35% more quiet---guys it's as different as day and night!!! I noticed the new Eibach springs have much larger coils and the weight of them is at least twice of the stock springs---maybe there is some metal harmonics going on
with the stock stuff, could be the upper control arm is acting like a tuning fork I really don't know. My car is completely different and in a very good
way--just thought I would pass this information on

SophiaZ · 05-08-2010, 11:42 AM

I got my tire noise reduced by 95% with my new exhaust

6MT · 05-08-2010, 11:57 AM

Quote:

Originally Posted by SophiaZ

I got my tire noise reduced by 95% with my new exhaust

YESSSSS!!! Me too!!

daleks · 05-08-2010, 11:51 AM

Quote:

Originally Posted by Who Knows

Everyone here knows how noisey these cars are---I changed all of the following at the same time: 15mm spacers front, 20mm spacers rear, Eibach
springs, Adjustible upper front control arms, rear adjustable camber arms. I really, really like how the car looks and handles/ much better than stock but the neatest thing about all of this is my car is at least 25% or really closer to 35% more quiet---guys it's as different as day and night!!! I noticed the new Eibach springs have much larger coils and the weight of them is at least twice of the stock springs---maybe there is some metal harmonics going on
with the stock stuff, could be the upper control arm is acting like a tuning fork I really don't know. My car is completely different and in a very good
way--just thought I would pass this information on

You have a differently sized contact patch between the road and your tire now with all of the suspension geometry changes. Have you done an alignment? Are you in or out of spec? The contact patch size will determine most of your road noise.

Modshack · 05-08-2010, 12:05 PM

Quote:

Originally Posted by daleks

You have a differently sized contact patch between the road and your tire now with all of the suspension geometry changes. Have you done an alignment? Are you in or out of spec? The contact patch size will determine most of your road noise.

Bingo!

Zsteve · 05-08-2010, 03:36 PM

Quote:

Originally Posted by Modshack

Bingo!

what does he win?

nogoodname · 05-08-2010, 12:11 PM

damn, I changed my suspension setup and it's more noisey...lol

spearfish25 · 05-08-2010, 12:16 PM

If I drive my wife around, I never hear the tires.

Zsteve · 05-08-2010, 03:36 PM

Quote:

Originally Posted by spearfish25

If I drive my wife around, I never hear the tires.

F'ing funny as Heeeeellllllll!

Does she know you are bragging on her?

cab83_750 · 05-08-2010, 05:46 PM

Quote:

Originally Posted by spearfish25

If I drive my wife around, I never hear the tires.

Heh heh heh!

Reminds menof what unread long time ago:

Q: do you know why American men take up fishing or golf at retirement?

A: to get away from the nagging wife!!!!

PapoZalsa · 05-08-2010, 10:27 PM

Quote:

Originally Posted by spearfish25

If I drive my wife around, I never hear the tires.

Chan Chee Hoe · 05-09-2010, 07:21 AM

I pumped my tires air pressure to 40psi,it is much quieter than the 35psi that Nissan advice,maybe less contact patch is the reason.?

PoP! · 05-08-2010, 12:18 PM

^ best answer yet lol

steveg78 · 05-08-2010, 06:15 PM

Can you quantify how you are coming up with your initial noise reduction figure of 25% and then readjusting your figure to 35%?

jpit · 05-08-2010, 06:21 PM

Why do men die before their wives?

Because they want to.

05-08-2010, 11:21 AM	#1 (permalink)
Who Knows Base Member Join Date: Oct 2009 Location: Fayetteville, NC Posts: 8 Drives: 2008-370z-Blue-auto Rep Power: 16	Reduced Tire Noise 25% by accident Everyone here knows how noisey these cars are---I changed all of the following at the same time: 15mm spacers front, 20mm spacers rear, Eibach springs, Adjustible upper front control arms, rear adjustable camber arms. I really, really like how the car looks and handles/ much better than stock but the neatest thing about all of this is my car is at least 25% or really closer to 35% more quiet---guys it's as different as day and night!!! I noticed the new Eibach springs have much larger coils and the weight of them is at least twice of the stock springs---maybe there is some metal harmonics going on with the stock stuff, could be the upper control arm is acting like a tuning fork I really don't know. My car is completely different and in a very good way--just thought I would pass this information on

05-08-2010, 12:16 PM	#8 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	If I drive my wife around, I never hear the tires. __________________ 2013 Cadillac V-Wagon, RIP Z

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05-08-2010, 11:42 AM	#2 (permalink)
SophiaZ A True Z Fanatic Join Date: Dec 2009 Location: South Jersey Posts: 1,463 Drives: 2020 50th anniv 7AT Rep Power: 6733	I got my tire noise reduced by 95% with my new exhaust

05-08-2010, 12:11 PM	#7 (permalink)
nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1765	damn, I changed my suspension setup and it's more noisey...lol

05-09-2010, 07:21 AM	#12 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 18	I pumped my tires air pressure to 40psi,it is much quieter than the 35psi that Nissan advice,maybe less contact patch is the reason.?

05-08-2010, 12:18 PM	#13 (permalink)
PoP! Base Member Join Date: Mar 2010 Location: Northwest Posts: 26 Drives: 10 Nismo PW Rep Power: 16	^ best answer yet lol

05-08-2010, 06:15 PM	#14 (permalink)
steveg78 Track Member Join Date: Apr 2009 Location: MD Posts: 569 Drives: 09 370Z PG M6 +Sport Rep Power: 18	Can you quantify how you are coming up with your initial noise reduction figure of 25% and then readjusting your figure to 35%?

05-08-2010, 06:21 PM	#15 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 17	Why do men die before their wives? Because they want to.