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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Engine, Exhaust, Transmission (https://www.ft86club.com/forums/forumdisplay.php?f=8)
-   -   Catless Front Pipe VS Test Front Pipe. What's the Difference? (https://www.ft86club.com/forums/showthread.php?t=87010)

GotBRZ1691 04-22-2015 05:49 PM
I work in construction safety and have access to a dosimeter. I plan to start recording sound levels of twins with different exhaust set ups. Using the same device with the same testing metrics would lead to good comparison results.

Someday soon I will start this with the Norcal crew.

geruta 04-22-2015 06:42 PM
Quote:
Originally Posted by GotBRZ1691 (Post 2223162)
I work in construction safety and have access to a dosimeter. I plan to start recording sound levels of twins with different exhaust set ups. Using the same device with the same testing metrics would lead to good comparison results.

Someday soon I will start this with the Norcal crew.


This would be very much appreciated if you did. A lot of people could benefit from this. Knowing what to buy when you want a loud setup, soft setup, or somewhere in between could really help save people money and frustrations from buying/installing and getting unwanted results.

ayetothejay 04-23-2015 02:06 AM
Quote:
Originally Posted by geruta (Post 2223104)
I have a greddy axel back and I really like the looks and sounds of it. Its fairly quiet so I think if i went and installed a catless FP it would make it louder and not be over bearing.

Considering that the mid pipe has been said to not make a difference if any, in terms of HP or loudness of exhaust, I figured I just leave that stock.
Here's a clip of stock headers/stock op/catless fp(tanabe)/stock mp/greddy sp elite axleback. I'm actually going to run the exact same setup after I find the time to install my front pipe.

[ame]http://youtu.be/N29VYoETkCM[/ame]

RobertPaulson 04-23-2015 12:57 PM
Quote:
Originally Posted by chas3wba0 (Post 2223064)
Since we're on the topic of catted vs catless...

Catless front pipe:
BRZ exhaust: Catted UEL header+track pipe+catback, Pt. 3 - YouTube

Catted:
BRZ exhaust: Catted UEL header+catted front pipe+catback - YouTube



The difference is rasp.
was your catless front pipe resonated?

chas3wba0 04-23-2015 02:34 PM
Quote:
Originally Posted by RobertPaulson (Post 2224254)
was your catless front pipe resonated?
Negative, t'was a straight pipe from Perrin

RobertPaulson 04-23-2015 03:52 PM
Quote:
Originally Posted by chas3wba0 (Post 2224415)
Negative, t'was a straight pipe from Perrin
ah, yeah a resonator would have killed the rasp, I'm completely catless with a resonated ark front pipe and the resonated perrin and i have very little rasp except on cold starts and right around 6k rpm. but i can only hear it if driving next to another car or a wall. otherwise 0 raps gets into the cabin.

chas3wba0 04-23-2015 04:07 PM
Quote:
Originally Posted by RobertPaulson (Post 2224573)
ah, yeah a resonator would have killed the rasp, I'm completely catless with a resonated ark front pipe and the resonated perrin and i have very little rasp except on cold starts and right around 6k rpm. but i can only hear it if driving next to another car or a wall. otherwise 0 raps gets into the cabin.
I actually thought catless sounded great from inside the cabin. It was only from the video and from having someone else drive my car around that I heard the rasp T__T


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