Anyone Experience the Loud days / Quiet days with their Evo?

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Aug 10, 2007 | 04:30 PM

#16

zsevo

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From: Michigan

I have the megan catback and ttp engineering downpipe I installed last week I changed the oil to amsoil and the next day the exhaust became alot quieter does anyone no why that might be

Aug 10, 2007 | 04:33 PM

#17

PhoenixEvo

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From: AtX

Only time i hear my exhaust get louder is if i roll down the REAR windows.

Aug 10, 2007 | 04:37 PM

#18

jamerin

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From: Earlimart, Ca

Quote:

Originally Posted by B4IFLY

Seems to be louder when you are beside or in front a cop car............and then you perspire

I hate that when they turn around and give you a fix it ticket.......

Gotta love the city of Rapebank.....(Burbank)

9

Aug 10, 2007 | 05:10 PM

#19

jfLip

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From: VA

Quote:

Originally Posted by boostless

happens to me...sometimes it sounds smooth and others more "burly" i guess. I'm thinking temps play a part

I noticed that yesterday... It was extremely humid and the exhaust seemed more "burbly." I notice it's also more "burbly" when I boost more.

Aug 10, 2007 | 07:35 PM

#20

Redline-Z

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From: Sacile, Italy

I only notice my Whinebro keeps getting louder! Oh well, I have a BR TBE w/HFC and it is fairly quiet. I love it

Aug 10, 2007 | 08:41 PM

#21

AhmadHasib

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From: Sugar Land, Tx

thanks everyone

Aug 10, 2007 | 09:20 PM

#22

Tarmac_IX

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From: g-boro (N.C.)

Quote:

Originally Posted by Rudager

I guess air density might affect the harshness of the sound...depends on the temp outside? thats just a guess

my thoughts as well... it is very humid where i am at and driving at night i can hear stock exhaust better and the turbo sounds especially noisy

Aug 10, 2007 | 09:20 PM

#23

denolloyd

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From: Tampa, FL

The lower the air pressure, the louder the sound. i dont remember the exact science though...

Aug 10, 2007 | 10:44 PM

#24

EVO9_IX

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From: California

mines all stock I dont eperience any loud sounds but my frien does on his

Aug 10, 2007 | 11:34 PM

#25

TheBlueBlur

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From: Chicago

Stock exhaust is pretty quite. Going aftermarket soon, but dont know if I want a test pipe or HFC...

Aug 11, 2007 | 02:46 AM

#26

Jakeg97

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From: Western NY

it get quieter as you get use to the noise level

Aug 11, 2007 | 07:34 AM

#27

skywestseth

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From: Manhattan, Kansas

Quote:

Originally Posted by TheBlueBlur

Stock exhaust is pretty quite. Going aftermarket soon, but dont know if I want a test pipe or HFC...

Neither, Catless downpipe FTW

https://www.evolutionm.net/forums/sh...d.php?t=284692

Aug 11, 2007 | 09:55 AM

#28

UCLAevoIX

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From: Bay Area

Quote:

Originally Posted by denolloyd

The lower the air pressure, the louder the sound. i dont remember the exact science though...

less dense, more easily compressible, more sensitive to sound waves?

Aug 11, 2007 | 03:09 PM

#29

TTP Engineering

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From: Central FL

Mine gets louder when the silencer is removed from the tip.

Aug 11, 2007 | 03:10 PM

#30

TTP Engineering

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From: Central FL

Seriously the engine is an instrument in which gets tuned. Just like a bandpass speaker box, certain RPM frequencies will resonate louder than others. Typically 4000-4500rpms is peak for my setup.

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