what about having only 1 high flow cat? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Boofneenee · 04-16-2014, 09:13 PM

So, I have my open flash header being installed Friday morning and I have a dilemma. I worry that with the removal of the cat from the header (primary cat at that) and only a high flow cat as part of my nameless OP/DP w/ resonator their will be rasp and it will be too loud!

Does anyone with this type of exhaust composition care to share their experiences?

As of now my mind is set to put the OEM OP and DP with stock cat and sell the nameless OP/DP 1 piece. I am hoping to be convinced otherwise.

thanks
JOsh

nelsmar · 04-16-2014, 09:20 PM

Buy a better muffler? I have heard numerous setups without much rasp. Nameless 5" (3" diameter) axle back, stock mid, JDL OP, catted FP, and UEL header sounded quite night with not much rasp.

nelsmar · 04-16-2014, 09:22 PM

Here is a video of the nameless muffler + JDL (catted) FP OP and UEL from when I had it on the dyno recently:

[ame="https://www.youtube.com/watch?v=stn22D6Ftog"]Subaru BRZ Dyno Close Up - YouTube[/ame]

It is just a hair deeper toned in person.

Boofneenee · 04-16-2014, 10:47 PM

Quote:

Originally Posted by nelsmar

Here is a video of the nameless muffler + JDL (catted) FP OP and UEL from when I had it on the dyno recently:

It is just a hair deeper toned in person.

don't you have FI? I believe that should tame the sound. no?

Bg8780 · 04-17-2014, 12:15 AM

I am also interested in this as I plan to go JDL UEL header and OP with a cat in only the mid pipe. But I'm also looking at the quietest mufflers on the market (perrin, Q300, etc).

Thanks for the video Nelsmar but I think we're looking for a N/A application. FI probably changes the sound quite a bit.

hakkoo · 04-17-2014, 12:32 AM

Quote:

Originally Posted by Boofneenee

don't you have FI? I believe that should tame the sound. no?

thats not his car, its a car he tuned/dyno'd

Vmax911 · 04-17-2014, 02:04 AM

It depends on the muffler. I ran a full aftermarket and catless system with the OFH, and had no rasp with the q300. I have since put the stock front pipe back on the help with the smell. You can always do the same.

nelsmar · 04-17-2014, 02:08 AM

Quote:

Originally Posted by hakkoo

thats not his car, its a car he tuned/dyno'd

^^ this. I'll have another single high flow cat car on the dyno with a greddy sp elite muffler. Then another with a full exhaust a week after that I'll try and remember to bring my camera and record the sound.

OjiGeorge · 04-17-2014, 03:45 AM

I'm running the ark testpipe and thae car is really quiet. That said the full exhaust is 2.5" DP back, as I wanted ot keep the in cabin noise down. It's 100% female friendly. The number one comment people make is how quiet the car is, inside and out. Still has all the wicked turbo sounds

Roadliner · 04-17-2014, 05:15 AM

Im running a single high flow cat with my slightly UEL headers followed by full MILLTEK exhaust. No drone or rasp due to a quiet muffler and long resonator.

Boofneenee · 04-17-2014, 08:21 AM

Hmmm maybe if I put the stock cat back on.

nelsmar · 04-17-2014, 01:25 PM

Quote:

Originally Posted by Boofneenee

Hmmm maybe if I put the stock cat back on.

I would try just installing what you have and decide if its too raspy before jumping to conclusions :P Thats the easiest way to find out! The EL headers from what I have personally heard typically have more rasp than the UEL.

Ranatsu · 04-17-2014, 02:38 PM

I had the Nameless axle back with 5" mufflers on my car yesterday to see how it sounded with the rest of my setup: Nameless Headers > Nameless OP/FP Combo with Cat and Resonator. It was fairly quiet at idle and cruise, and at WOT it got louder but nothing compared to the muffler delete I have been running. The only negative sound that I got was that sound that people say is the VVT system.

04-16-2014, 09:13 PM	#1
Boofneenee Go-Kart Enthusiast Join Date: Aug 2013 Drives: Toyota Scion FRS Location: Yup Posts: 800 Thanks: 576 Thanked 309 Times in 188 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	what about having only 1 high flow cat? So, I have my open flash header being installed Friday morning and I have a dilemma. I worry that with the removal of the cat from the header (primary cat at that) and only a high flow cat as part of my nameless OP/DP w/ resonator their will be rasp and it will be too loud! Does anyone with this type of exhaust composition care to share their experiences? As of now my mind is set to put the OEM OP and DP with stock cat and sell the nameless OP/DP 1 piece. I am hoping to be convinced otherwise. thanks JOsh __________________ FRS Current mods: K&N air filter, OFT, OFH, berk high flow cat front pipe, Q300 exhaust, lighter wheels

04-16-2014, 09:20 PM	#2
nelsmar Senior Member Join Date: Feb 2013 Drives: FR-S Location: Phoenix Posts: 2,605 Thanks: 733 Thanked 2,361 Times in 1,031 Posts Mentioned: 345 Post(s) Tagged: 3 Thread(s)	Buy a better muffler? I have heard numerous setups without much rasp. Nameless 5" (3" diameter) axle back, stock mid, JDL OP, catted FP, and UEL header sounded quite night with not much rasp. __________________ When I grow up, I wanna be God. My flickr - *Canibeat* Local magazine scout Old Setup: Vortech Supercharged 360WHP/262WTQ @ 11.5psi My build thread - WTF happened to nelsmar's car thread

04-16-2014, 09:22 PM	#3
nelsmar Senior Member Join Date: Feb 2013 Drives: FR-S Location: Phoenix Posts: 2,605 Thanks: 733 Thanked 2,361 Times in 1,031 Posts Mentioned: 345 Post(s) Tagged: 3 Thread(s)	Here is a video of the nameless muffler + JDL (catted) FP OP and UEL from when I had it on the dyno recently: [ame="https://www.youtube.com/watch?v=stn22D6Ftog"]Subaru BRZ Dyno Close Up - YouTube[/ame] It is just a hair deeper toned in person. __________________ When I grow up, I wanna be God. My flickr - *Canibeat* Local magazine scout Old Setup: Vortech Supercharged 360WHP/262WTQ @ 11.5psi My build thread - WTF happened to nelsmar's car thread

04-17-2014, 08:21 AM	#11
Boofneenee Go-Kart Enthusiast Join Date: Aug 2013 Drives: Toyota Scion FRS Location: Yup Posts: 800 Thanks: 576 Thanked 309 Times in 188 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Hmmm maybe if I put the stock cat back on. __________________ FRS Current mods: K&N air filter, OFT, OFH, berk high flow cat front pipe, Q300 exhaust, lighter wheels

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04-17-2014, 12:15 AM	#5
Bg8780 Senior Member Join Date: Jun 2012 Drives: '13 Black Subaru BRZ Limited Location: All over Posts: 479 Thanks: 439 Thanked 156 Times in 96 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	I am also interested in this as I plan to go JDL UEL header and OP with a cat in only the mid pipe. But I'm also looking at the quietest mufflers on the market (perrin, Q300, etc). Thanks for the video Nelsmar but I think we're looking for a N/A application. FI probably changes the sound quite a bit.

04-17-2014, 02:04 AM	#7
Vmax911 Senior Member Join Date: May 2013 Drives: WRB BRZ Location: ABQ Posts: 354 Thanks: 38 Thanked 89 Times in 58 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	It depends on the muffler. I ran a full aftermarket and catless system with the OFH, and had no rasp with the q300. I have since put the stock front pipe back on the help with the smell. You can always do the same.

04-17-2014, 03:45 AM	#9
OjiGeorge Senior Member Join Date: Jul 2012 Drives: White 2013 FRS Location: Langley, BC Posts: 450 Thanks: 441 Thanked 146 Times in 92 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	I'm running the ark testpipe and thae car is really quiet. That said the full exhaust is 2.5" DP back, as I wanted ot keep the in cabin noise down. It's 100% female friendly. The number one comment people make is how quiet the car is, inside and out. Still has all the wicked turbo sounds

04-17-2014, 05:15 AM	#10
Roadliner Member Join Date: Oct 2012 Drives: GT86 Location: Western Australia Posts: 69 Thanks: 154 Thanked 20 Times in 16 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Im running a single high flow cat with my slightly UEL headers followed by full MILLTEK exhaust. No drone or rasp due to a quiet muffler and long resonator.

04-17-2014, 02:38 PM	#13
Ranatsu Cone basher Join Date: Mar 2012 Drives: 2017 Subaru BRZ Series.Yellow Location: Dodgin cones in San Antonio, TX Posts: 800 Thanks: 51 Thanked 256 Times in 169 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	I had the Nameless axle back with 5" mufflers on my car yesterday to see how it sounded with the rest of my setup: Nameless Headers > Nameless OP/FP Combo with Cat and Resonator. It was fairly quiet at idle and cruise, and at WOT it got louder but nothing compared to the muffler delete I have been running. The only negative sound that I got was that sound that people say is the VVT system.

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