Boosted FRS no drone but too raspy! - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Densefire · 09-21-2015, 03:05 PM

Hey everyone having a bit of a dilemma here. After searching, researching, and careful consideration I've Cherry Picked my exhaust parts to hopefully get a decently loud exhaust note without much rasp or drone. And I'm actually quite close.

I'm running tomei UEL header, HKS dual resonated front pipe and a Greddy SP elite axleback. And I should note I am supercharged using kraftworks kit.

The sound is OK in the car and I've managed to go catless with near zero drone even at up to 80mph its pretty amazing but the rasp under even slight acceleration is unbearable and honestly embarrassing. Here's a vid:

Any suggestions on getting that rasp or poppy noise down to a minimum would be greatly appreciated!

kch · 09-21-2015, 04:15 PM

That sounds more brappy than raspy to me. Unless that's the same thing.

Either way, a 200cell cat might help with minimal added restriction. Or maybe a header that's a little heavier-weight than the tomei.

Densefire · 09-21-2015, 04:35 PM

The brappy is the sound I'm talking about I just wasn't sure how to word it. I agree about the cat but I'd rather not have to replace a pipe I've already replaced :/ looks like I'm going to have to give in and do something creative with my midpipe at a muffler shop. I'm still open to opinions and suggestions if anyone wants to chime in

EpicNameBro · 09-21-2015, 04:53 PM

The header is the issue...two solutions. Get a catted one or revert back to stock...

Densefire · 09-21-2015, 05:00 PM

Quote:

Originally Posted by EpicNameBro

The header is the issue...two solutions. Get a catted one or revert back to stock...

Darn that's sad to hear

kch · 09-21-2015, 08:07 PM

Quote:

Originally Posted by EpicNameBro

The header is the issue...two solutions. Get a catted one or revert back to stock...

Not necessarily. I have a catless header and mine isn't brappy. It's just a heavier header than the tomei.

Skip to 21s and watch through the end
[ame="https://www.youtube.com/watch?v=VnEYvkiW5k0"]BRZ w/ JDL UEL & Perrin resonated drive by - YouTube[/ame]

[ame="https://www.youtube.com/watch?v=y1kyhCzlx-o"]BRZ w/ JDL UEL & Perrin resonated 2.5:" revving - YouTube[/ame]

TruRace · 09-21-2015, 10:29 PM

I just got the jdl "ultra quite" front pipe, which is catted/resonated, and helped ALOT with my rasp issues. I've got a Tomei UEL and HKS catback, the noise and rasp was out of control. This helped a lot.

EpicNameBro · 09-22-2015, 02:36 AM

Quote:

Originally Posted by kch

Not necessarily. I have a catless header and mine isn't brappy. It's just a heavier header than the tomei.

Skip to 21s and watch through the end

That is because you have a better quality header as well as exhaust set up. Speaking specifically on his set up and what he wants, the header is the issue...

humfrz · 09-22-2015, 03:03 AM

Quote:

Originally Posted by Densefire

Any suggestions on getting that rasp or poppy noise down to a minimum would be greatly appreciated!

Maybe......put the stock muffler back on ......

humfrz

ryoma · 09-22-2015, 03:22 AM

do you think the dual resonators combined with the catback is causing it? most cars with the Tomei UEL don't sound like that.

Densefire · 09-22-2015, 11:07 AM

All good info thanks guys! This weekend I'm going to try different combinations using the stock pipes I took off and see how it sounds. I'll post some videos.

kch · 09-22-2015, 12:54 PM

Quote:

Originally Posted by EpicNameBro

That is because you have a better quality header as well as exhaust set up. Speaking specifically on his set up and what he wants, the header is the issue...

The 200cell cat I have in my FP probably also contributes.

chaoskaze · 09-22-2015, 01:01 PM

I think you should try putting stock muffler back on :p

raven1231 · 09-22-2015, 01:22 PM

that does sound like shit

09-21-2015, 03:05 PM	#1
Densefire Junior Member Join Date: Jan 2014 Drives: 2014 Raven FR-S Location: Mississippi Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Boosted FRS no drone but too raspy! Hey everyone having a bit of a dilemma here. After searching, researching, and careful consideration I've Cherry Picked my exhaust parts to hopefully get a decently loud exhaust note without much rasp or drone. And I'm actually quite close. I'm running tomei UEL header, HKS dual resonated front pipe and a Greddy SP elite axleback. And I should note I am supercharged using kraftworks kit. The sound is OK in the car and I've managed to go catless with near zero drone even at up to 80mph its pretty amazing but the rasp under even slight acceleration is unbearable and honestly embarrassing. Here's a vid: Any suggestions on getting that rasp or poppy noise down to a minimum would be greatly appreciated!

09-22-2015, 03:22 AM	#10
ryoma Senior Member Join Date: Mar 2015 Drives: 2015 Subaru BRZ Limited CWP Location: SoCal Posts: 1,561 Thanks: 34 Thanked 669 Times in 469 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	do you think the dual resonators combined with the catback is causing it? most cars with the Tomei UEL don't sound like that. __________________ My 2015 CWP BRZ Build

09-22-2015, 01:22 PM	#14
raven1231 Senior Member Join Date: Aug 2013 Drives: 2013 Firestorm FR-S, 2016 DGM WRX Location: Cincinnati, Ohio Posts: 4,580 Thanks: 8,264 Thanked 3,118 Times in 1,667 Posts Mentioned: 24 Post(s) Tagged: 1 Thread(s)	that does sound like shit __________________ http://www.ft86club.com/forums/showthread.php?t=59870

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09-21-2015, 04:15 PM	#2
kch Senior Misanthrope Join Date: Sep 2014 Drives: 2015 BRZ Series.Blue CWP Location: Seattle, WA Posts: 1,490 Thanks: 1,743 Thanked 1,168 Times in 645 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	That sounds more brappy than raspy to me. Unless that's the same thing. Either way, a 200cell cat might help with minimal added restriction. Or maybe a header that's a little heavier-weight than the tomei.

09-21-2015, 04:35 PM	#3
Densefire Junior Member Join Date: Jan 2014 Drives: 2014 Raven FR-S Location: Mississippi Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	The brappy is the sound I'm talking about I just wasn't sure how to word it. I agree about the cat but I'd rather not have to replace a pipe I've already replaced :/ looks like I'm going to have to give in and do something creative with my midpipe at a muffler shop. I'm still open to opinions and suggestions if anyone wants to chime in

09-21-2015, 04:53 PM	#4
EpicNameBro Senior Member Join Date: May 2012 Drives: Slow... Location: Fightin' Child Support... Posts: 238 Thanks: 61 Thanked 85 Times in 63 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	The header is the issue...two solutions. Get a catted one or revert back to stock...

09-21-2015, 10:29 PM	#7
TruRace Senior Member Join Date: Sep 2013 Drives: FRS-Raven-MT Location: Ft. Lauderdale, FL Posts: 336 Thanks: 58 Thanked 143 Times in 99 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	I just got the jdl "ultra quite" front pipe, which is catted/resonated, and helped ALOT with my rasp issues. I've got a Tomei UEL and HKS catback, the noise and rasp was out of control. This helped a lot.

09-22-2015, 11:07 AM	#11
Densefire Junior Member Join Date: Jan 2014 Drives: 2014 Raven FR-S Location: Mississippi Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	All good info thanks guys! This weekend I'm going to try different combinations using the stock pipes I took off and see how it sounds. I'll post some videos.

09-22-2015, 01:01 PM	#13
chaoskaze The Fail Boat Join Date: Aug 2011 Drives: CWP S.B. Location: LasVegas Posts: 3,028 Thanks: 4,718 Thanked 1,293 Times in 873 Posts Mentioned: 19 Post(s) Tagged: 0 Thread(s)	I think you should try putting stock muffler back on :p

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