headers rasp - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mamamiaellis · 05-20-2015, 05:15 PM

Hello
bonjour
guttentag
ni hao
ahnyong
shalom
hola
priviet
konichiwha
and hello (lol)

i just recently installed my tomei UEL on my ferrari BRZ. at first, i was intoxicated and fell in love. But now, since the headers have been on for about a week and i had time to live with it, i have notice some unwanted rasp. Now i know taking out the primary cat etc. (pretty much almost all headers in general) will give me this noise.
My current setup is Tomei UEL -> Perrin overpipe -> Berk HFC Front pipe -> perrin 2.5in resonated catback.
I am thinking about putting my oem front pipe back on.
My question is (sorry for taking so long ), at the time i had a hard time taking off the front pipe. taking off the heat shield for the front pipe helped.
would not having the heat shield matter? is having the Heat shield important? what does it protect heat from? etc

i also might or might not have a crack/leak somewhere that is contributing to the rasp.

thanks DAWWGGSSS

weederr33 · 05-20-2015, 05:27 PM

A resonator in your front pipe would help the rasp for sure!

mamamiaellis · 05-20-2015, 06:00 PM

are there any resonators with a cat?
im trying to hold on to one.
stinky stinky too strong in CA

Ranatsu · 05-20-2015, 06:40 PM

You can get the nameless fp with a resonator and cat. I'm running the Nameless headers to the Nameless OP/FP combo with resonator and cat into the 2.5" resonated perrin catback. It has minimal rasp. I have a few videos posted if you look up some of my posts.

churchx · 05-20-2015, 07:32 PM

IIRC there are both catted and resonated frontpipes. Problem of CA being .. even if they are catted .. they are still illegal there :/. You cannot replace/relocate any of cats and pass inspections there, from what i've heard, so you are limited only to slight gains by catback exhaust/drop in filter, tune and E85. Or go with forced induction, leaving stock exhaust as is.

mamamiaellis · 05-20-2015, 08:04 PM

im pretty aware of CA's emissions laws. But i keep a cat keep the stinkers out.

but i drove my car today and it sounds less raspy when fully warmed up???
i took a crappy video with my iphone.

[ame="https://www.youtube.com/watch?v=h1CgEawrGwE"]YouTube[/ame]

enjoy the view of the birdpoo on the rear windshield =]

autograph · 05-20-2015, 08:10 PM

Quote:

Originally Posted by mamamiaellis

im pretty aware of CA's emissions laws. But i keep a cat keep the stinkers out.

but i drove my car today and it sounds less raspy when fully warmed up???
i took a crappy video with my iphone.

enjoy the view of the birdpoo on the rear windshield =]

says video is private, change settings so the rest of us can see it

mamamiaellis · 05-20-2015, 08:13 PM

done....its a really poor quality video.
in-cabin as well.

like....relaly bad quality...

Hyper4mance2k · 05-20-2015, 08:30 PM

This has been covered 9 billion times.

http://lmgtfy.com/?q=header+rasp+site%3Aft86club.com

I don't hear any rasp in your video. Sounds good to me. taking off the heat shield may change under car aero & venting of the engine bay; I err on the safe side and say it's there for a reason.

mamamiaellis · 05-20-2015, 08:52 PM

thanks Hyper4mance2k
your answer regarding the heat shield was what i was after. not so much the rasp part.
thanks!

2much · 05-20-2015, 09:13 PM

I have rasp with my OFH and completely stock exhaust from there back. At least I do if I am understanding rasp correctly.

Turdinator · 05-20-2015, 09:20 PM

JDL do a front pipe they call 'ultra quiet' with a cat and a resonator. I haven't seen any reviews but a few people have commented that it is no louder than the stock front pipe.

2016 Camaro SS · 05-20-2015, 10:45 PM

This shouldn't be necessary. I run a JDL catless UEL, JDL OP, JDL Catted FP, and Perrin 2.5" resonated and I have 0 rasp....

Literally the same setup as the OP, just different flavor. Could be the header? I'm failing to hear where the rasp is in that video as well.

mamamiaellis · 05-20-2015, 11:20 PM

Maybe just cold starts( obviously ) and first 10minites of driving.
The mid/upper register of the rev range isn't recorded in the video

05-20-2015, 05:15 PM	#1
mamamiaellis Member Join Date: Apr 2014 Drives: brz Location: SoCal Posts: 78 Thanks: 0 Thanked 9 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	headers rasp Hello bonjour guttentag ni hao ahnyong shalom hola priviet konichiwha and hello (lol) i just recently installed my tomei UEL on my ferrari BRZ. at first, i was intoxicated and fell in love. But now, since the headers have been on for about a week and i had time to live with it, i have notice some unwanted rasp. Now i know taking out the primary cat etc. (pretty much almost all headers in general) will give me this noise. My current setup is Tomei UEL -> Perrin overpipe -> Berk HFC Front pipe -> perrin 2.5in resonated catback. I am thinking about putting my oem front pipe back on. My question is (sorry for taking so long ), at the time i had a hard time taking off the front pipe. taking off the heat shield for the front pipe helped. would not having the heat shield matter? is having the Heat shield important? what does it protect heat from? etc i also might or might not have a crack/leak somewhere that is contributing to the rasp. thanks DAWWGGSSS

05-20-2015, 05:27 PM	#2
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,420 Thanks: 4,579 Thanked 5,706 Times in 2,992 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	A resonator in your front pipe would help the rasp for sure! __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

05-20-2015, 08:30 PM	#9
Hyper4mance2k Alexandrino_Auto Join Date: Apr 2014 Drives: series.Blue Location: Greater DMV Posts: 1,014 Thanks: 1,584 Thanked 637 Times in 377 Posts Mentioned: 10 Post(s) Tagged: 3 Thread(s)	This has been covered 9 billion times. http://lmgtfy.com/?q=header+rasp+site%3Aft86club.com I don't hear any rasp in your video. Sounds good to me. taking off the heat shield may change under car aero & venting of the engine bay; I err on the safe side and say it's there for a reason. __________________ The Shadetree Project: I turn wrenches

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05-20-2015, 06:00 PM	#3
mamamiaellis Member Join Date: Apr 2014 Drives: brz Location: SoCal Posts: 78 Thanks: 0 Thanked 9 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	are there any resonators with a cat? im trying to hold on to one. stinky stinky too strong in CA

05-20-2015, 06:40 PM	#4
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)	You can get the nameless fp with a resonator and cat. I'm running the Nameless headers to the Nameless OP/FP combo with resonator and cat into the 2.5" resonated perrin catback. It has minimal rasp. I have a few videos posted if you look up some of my posts.

05-20-2015, 07:32 PM	#5
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 698 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	IIRC there are both catted and resonated frontpipes. Problem of CA being .. even if they are catted .. they are still illegal there :/. You cannot replace/relocate any of cats and pass inspections there, from what i've heard, so you are limited only to slight gains by catback exhaust/drop in filter, tune and E85. Or go with forced induction, leaving stock exhaust as is.

05-20-2015, 08:04 PM	#6
mamamiaellis Member Join Date: Apr 2014 Drives: brz Location: SoCal Posts: 78 Thanks: 0 Thanked 9 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	im pretty aware of CA's emissions laws. But i keep a cat keep the stinkers out. but i drove my car today and it sounds less raspy when fully warmed up??? i took a crappy video with my iphone. [ame="https://www.youtube.com/watch?v=h1CgEawrGwE"]YouTube[/ame] enjoy the view of the birdpoo on the rear windshield =]

05-20-2015, 08:13 PM	#8
mamamiaellis Member Join Date: Apr 2014 Drives: brz Location: SoCal Posts: 78 Thanks: 0 Thanked 9 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	done....its a really poor quality video. in-cabin as well. like....relaly bad quality...

05-20-2015, 08:52 PM	#10
mamamiaellis Member Join Date: Apr 2014 Drives: brz Location: SoCal Posts: 78 Thanks: 0 Thanked 9 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	thanks Hyper4mance2k your answer regarding the heat shield was what i was after. not so much the rasp part. thanks!

05-20-2015, 10:45 PM	#13
2016 Camaro SS Senior Member Join Date: Nov 2014 Drives: Fast Location: Austin, Texas Posts: 790 Thanks: 114 Thanked 408 Times in 241 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	This shouldn't be necessary. I run a JDL catless UEL, JDL OP, JDL Catted FP, and Perrin 2.5" resonated and I have 0 rasp.... Literally the same setup as the OP, just different flavor. Could be the header? I'm failing to hear where the rasp is in that video as well.

05-20-2015, 11:20 PM	#14
mamamiaellis Member Join Date: Apr 2014 Drives: brz Location: SoCal Posts: 78 Thanks: 0 Thanked 9 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Maybe just cold starts( obviously ) and first 10minites of driving. The mid/upper register of the rev range isn't recorded in the video

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