making the exhaust noise tolerable at WOT and being catless. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

BRZPDX · 01-26-2014, 08:43 PM

So with my recent addition of a TC kit/EL header, I have 0 cats in my car. I have the Invidia N1, and is way too loud now at WOT (0% ~ 50% throttle is pretty tame).

Are cats the only way to make everything quieter? Or will adding more resonators help? I have no rasp on my exhaust currently, just way too freaking loud.

Also, I've never had a muffler shop make custom exhausts, but is this a viable route as well?

As far as quiet exhausts go, all i can find is the Q300, stock exhaust, resonated Perrin. They all seem a little raspier compared to the N1's deep bassy tone.

Any suggestions?

SmsAlSuwaidi · 01-26-2014, 08:56 PM

resonators / mufflers are the way to tone down noise not cats

Malt · 01-26-2014, 09:45 PM

Quote:

Originally Posted by SmsAlSuwaidi

resonators / mufflers are the way to tone down noise not cats

Resonators tone down rasp, not volume. The solution is to put on a quieter muffler.

shaunsweeney · 01-26-2014, 10:10 PM

Magnaflow has a nice deep tone and is quiet.

mrk1 · 01-26-2014, 10:25 PM

The size a placement of the muffler is really what controls end volume. Position and size of resonators change the tone, this includes rasp. Now knocking down the rasp and altering the tone can make the end sound seem quieter and less abrasive to the ear with out actually registering lower on say a db meter.

shaunsweeney · 01-26-2014, 10:32 PM

If you look it seems most of the quiet systems for this platform use a factory style transverse muffler.

mrk1 · 01-26-2014, 10:35 PM

Quote:

Originally Posted by shaunsweeney

If you look it seems most of the quiet systems for this platform use a factory style transverse muffler.

Yeah thats one of the only ways to fit a large muffler under these cars. There really isnt much room to play with

shaunsweeney · 01-26-2014, 10:38 PM

Exactly. The issue with bullet style mufflers is the lack of sound absorbent material that can be packed in them.

s2d4 · 01-26-2014, 11:06 PM

Always upgrade the source end first if sound is your thing.

jflogerzi · 01-27-2014, 12:24 AM

Try running with the stock front pipe.

mxsled · 01-27-2014, 12:31 AM

Quote:

Originally Posted by jflogerzi

Try running with the stock front pipe.

+1
here my car with catless frontpipe

here now with the stock frontpipe:
[ame]http://youtu.be/tdx62mHnRB4[/ame]

FT-86 SpeedFactory · 01-27-2014, 12:40 AM

The header is the main issue. We've seen it time and time again. A catted header is the only way we have found to keep the noise down. Catless header and you are in for some ear bleeding.

s2d4 · 01-27-2014, 01:34 AM

Quote:

Originally Posted by FT-86 SpeedFactory

The header is the main issue. We've seen it time and time again. A catted header is the only way we have found to keep the noise down. Catless header and you are in for some ear bleeding.

Ohh boy...

BRZPDX · 01-27-2014, 01:37 AM

but ideally with FI, you don't want to have any cats correct? Ugh, my buddy has a 1000whp Supra, and my car still sounds louder..

01-26-2014, 10:25 PM	#5
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s) Tagged: 2 Thread(s)	The size a placement of the muffler is really what controls end volume. Position and size of resonators change the tone, this includes rasp. Now knocking down the rasp and altering the tone can make the end sound seem quieter and less abrasive to the ear with out actually registering lower on say a db meter. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

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01-26-2014, 08:56 PM	#2
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01-26-2014, 11:06 PM	#9
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01-27-2014, 12:40 AM	#12
FT-86 SpeedFactory Join Date: Jul 2012 Drives: 2013 Scion FR-S Location: Des Moines, IA Posts: 7,694 Thanks: 1,298 Thanked 3,579 Times in 1,253 Posts Mentioned: 341 Post(s) Tagged: 5 Thread(s)	The header is the main issue. We've seen it time and time again. A catted header is the only way we have found to keep the noise down. Catless header and you are in for some ear bleeding.

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