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-   -   high power-low db prototype muffler (https://www.ft86club.com/forums/showthread.php?t=95331)

mav1178 10-06-2015 01:59 PM

Quote:

Originally Posted by churchx (Post 2411338)
mav1178: any numbers should be accompanied by nfo how loudness was measured. For example for this Fujitsubo data how can one know distance (which can change measurements a lot) at which those numbers were seen? Hence one cannot gauge what these dBs mean vs 90dB mentioned earlier.

Yes I know, I am providing reference points.

fumanchu1 10-07-2015 02:32 PM

Quote:

Originally Posted by calmtigers (Post 2402296)
Also weight? Why would someone buy this over another "quiet" exhaust. invidia or perrin style?

Did... Did you just refer to the perrin exhaust as Quiet?!!? Don't think we have the same definition of quiet as with my JDL header, perrin 3" exhaust with 4.5" tips I wake up my brother 6 houses down on cold starts...:bonk:

calmtigers 10-07-2015 03:06 PM

Quote:

Originally Posted by fumanchu1 (Post 2412682)
Did... Did you just refer to the perrin exhaust as Quiet?!!? Don't think we have the same definition of quiet as with my JDL header, perrin 3" exhaust with 4.5" tips I wake up my brother 6 houses down on cold starts...:bonk:

pair those headers up with another catback and see what you cause haha.
My 2.5 resonated keeps my car down to a purr other than when i want it to be loud

BRZoomTX 10-07-2015 03:07 PM

I never really considered these cars very loud. The muffler delete didn't make a crazy amount of difference (resonator still in place). I went from that to full catless turbo through the OEM resonator and it still doesn't seem very loud.

Maybe I need to find someone with a full catless non-turbo car for comparison. Or maybe its just because I downgraded to my BRZ from a full catless H pipe Roush, so it doesn't seem loud to me. :P

fumanchu1 10-07-2015 03:37 PM

Quote:

Originally Posted by calmtigers (Post 2412748)
pair those headers up with another catback and see what you cause haha.
My 2.5 resonated keeps my car down to a purr other than when i want it to be loud

Are you NA, Turbo or supercharged. My C38 makes it much louder than stock to begin with (also the 3" vs 2.5" has to affect noise to a large extent). I mean I know there are much louder catbacks but the 3" perrin is not what I consider low volume.

Kinda looking forward to seeing what they come up with as I don't necessarily want everyone in my neighbourhood being able to tell when I leave home and come back

calmtigers 10-07-2015 08:26 PM

Quote:

Originally Posted by fumanchu1 (Post 2412805)
Are you NA, Turbo or supercharged. My C38 makes it much louder than stock to begin with (also the 3" vs 2.5" has to affect noise to a large extent). I mean I know there are much louder catbacks but the 3" perrin is not what I consider low volume.

Kinda looking forward to seeing what they come up with as I don't necessarily want everyone in my neighbourhood being able to tell when I leave home and come back

I'm NA so probably why mine is pretty quiet, really though noise is relative!

fumanchu1 10-08-2015 11:41 AM

I mean it won't make you deaf but you may have issues keeping up a conversation with the noise :)

sw20kosh 10-08-2015 01:18 PM

Quote:

Originally Posted by calmtigers (Post 2413185)
I'm NA so probably why mine is pretty quiet, really though noise is relative!

NA is louder than turbo...

Sleepless 10-08-2015 01:33 PM

Quote:

Originally Posted by Wepeel (Post 2411558)
Really interested in this. Is it safe to assume that with a fully catless setup, a Perrin 2.5 resonated or Q300 would exceed 90dB?

I'll be trying out catless UEL header, stock front pipe and Perrin 2.5 resonated in a few weeks. Crossing my fingers... I've heard my car on track and it seems quiet enough. But I'm guessing going with a catless front pipe would be over 90dB.

calmtigers 10-08-2015 02:24 PM

Quote:

Originally Posted by sw20kosh (Post 2413883)
NA is louder than turbo...

depends on the set up, open dump?

CSG David 10-08-2015 02:46 PM

Quote:

Originally Posted by calmtigers (Post 2413978)
depends on the set up, open dump?

I believe @sw20kosh is comparing similar exhaust setups for NA vs. Turbo.

Generally speaking, turbos are relatively quieter than natural aspirated setups. Many exhaust systems have failed at Laguna Seca, hence, why you see so many stock catbacks or extreme MRLS special angle tubes being used at that track.

The reality is, someone needs to take care of that retired dude who keeps suing for noise issues. For example, buy him some In N Out well done fries.

2much 10-08-2015 03:11 PM

Quote:

Originally Posted by CSG David (Post 2414009)
I believe @sw20kosh is comparing similar exhaust setups for NA vs. Turbo.

Generally speaking, turbos are relatively quieter than natural aspirated setups. Many exhaust systems have failed at Laguna Seca, hence, why you see so many stock catbacks or extreme MRLS special angle tubes being used at that track.

The reality is, someone needs to take care of that retired dude who keeps suing for noise issues. For example, buy him some In N Out well done fries.

Perhaps this is how we get you guys to go into production with this...
;)

Ultramaroon 10-08-2015 03:14 PM

[offtopic]On a good day I can hear the action. So cool.
http://i.imgur.com/DMxv4dR.png[/offtopic]

CSG David 10-08-2015 06:32 PM

Quote:

Originally Posted by 2much (Post 2414065)
Perhaps this is how we get you guys to go into production with this...
;)

The more financial support we get, the easier it is to continue testing and providing incredibly functional and awesome products. :drool:

Quote:

Originally Posted by Ultramaroon (Post 2414072)
[offtopic]On a good day I can hear the action. So cool.
http://i.imgur.com/DMxv4dR.png[/offtopic]

Tomei 60R daily? :bonk:


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