raspy note - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Dispect · 07-20-2013, 12:23 AM

hey guys,
i just recently got my exhaust work done.
perrin non-res catback
paired with a t1r catless front pipe.

i noticed a bit of raspyness after adding the front pipe. any way i can resolve this?

brzadmir · 07-20-2013, 12:33 AM

Catted front pipe

Quote:

Originally Posted by Dispect

hey guys,
i just recently got my exhaust work done.
perrin non-res catback
paired with a t1r catless front pipe.

i noticed a bit of raspyness after adding the front pipe. any way i can resolve this?

Wo6M · 07-20-2013, 12:36 AM

You could check for a exhaust leak. In most cases IMO are exhaust parts not lined up correctly allowing bits of exhaust to blow by causing this sound.
I do suggest posting a video so the community can further assist you.

Dispect · 07-20-2013, 01:00 AM

will do that tomorrow as it is a little late and dark out. thank you!

Dispect · 07-20-2013, 01:01 AM

Quote:

Originally Posted by brzadmir

Catted front pipe

t1r doesnt have any catted ones :/ will carbon build up help mellow it down a little? its not to the point where its unbearable but its there and i know its there and im kinda OCD

Propaganda · 07-20-2013, 01:02 AM

You could add a resonator in there somewhere.

I put a header on my last 4-banger and it was too raspy for my liking. I added in a resonator on the midpipe and it helped out a bit (also killed some drone and made it a tad bit quieter)

Dispect · 07-20-2013, 01:19 AM

Quote:

Originally Posted by Propaganda

You could add a resonator in there somewhere.

I put a header on my last 4-banger and it was too raspy for my liking. I added in a resonator on the midpipe and it helped out a bit (also killed some drone and made it a tad bit quieter)

i thought about that. even got a quote from perrin for a resonated mid pipe. but as of right now, i really like the sound level. i think its perfect. only issue is the rasp.

FR-S Matt · 07-20-2013, 09:32 AM

Get a small resonator or add the cat to the front pipe.

Captain Insano · 07-20-2013, 09:41 AM

Quote:

Originally Posted by Dispect

i thought about that. even got a quote from perrin for a resonated mid pipe. but as of right now, i really like the sound level. i think its perfect. only issue is the rasp.

Resonators don't change the sound level that much (minimal) they mainly help eliminate drone and raspyness. Granted, it depends on which type of resonator as there are some different types to choose from.

I have two resonators on mine right now (catless resonated front pipe and resonated midpipe - both simple canister resonators).

wparsons · 07-20-2013, 10:30 AM

You need either a catted front pipe, or a resonated mid pipe. An exhaust leak won't cause rasp, and carbon build up won't stop it.

FastLane1000 · 07-20-2013, 10:40 AM

You could also try header wrap on the front pipe.

Sing4LTS · 07-20-2013, 12:04 PM

What would the header wrap do?

FastLane1000 · 07-20-2013, 12:09 PM

It helps to reduce and soak up vibrations that cause the raspiness. It helped eliminate rasp I got from my header instalation.

wparsons · 07-20-2013, 06:56 PM

Rasp isn't from vibration.... and if the header wrap stops the pipes from vibrating they're WAY too flimsy.

The only way header wrap would stop a noise would be if the header or front pipe was rubbing on a heat shield or metal part of the car.

07-20-2013, 12:23 AM	#1
Dispect Newbie Car Enthusiast Join Date: Oct 2012 Drives: Asphalt 6MT FR-S Location: Canada Posts: 413 Thanks: 78 Thanked 54 Times in 31 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	raspy note hey guys, i just recently got my exhaust work done. perrin non-res catback paired with a t1r catless front pipe. i noticed a bit of raspyness after adding the front pipe. any way i can resolve this?

07-20-2013, 12:36 AM	#3
Wo6M Keep Calm And Drift On~ Join Date: May 2013 Drives: Scion FR-S WhiteOut 6 Speed Manual Location: Boca Raton ,FL Posts: 268 Thanks: 202 Thanked 114 Times in 61 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	You could check for a exhaust leak. In most cases IMO are exhaust parts not lined up correctly allowing bits of exhaust to blow by causing this sound. I do suggest posting a video so the community can further assist you. __________________ 2013 Scion FR-S White Out Six Speed Manual Name: Deava Mods:

07-20-2013, 10:40 AM	#11
FastLane1000 Senior Member Join Date: Sep 2012 Drives: White FR-S, 6M Location: East Tennessee Posts: 272 Thanks: 70 Thanked 92 Times in 53 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	You could also try header wrap on the front pipe. __________________ http://www.ft86club.com/forums/showthread.php?t=30038

07-20-2013, 12:09 PM	#13
FastLane1000 Senior Member Join Date: Sep 2012 Drives: White FR-S, 6M Location: East Tennessee Posts: 272 Thanks: 70 Thanked 92 Times in 53 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	It helps to reduce and soak up vibrations that cause the raspiness. It helped eliminate rasp I got from my header instalation. __________________ http://www.ft86club.com/forums/showthread.php?t=30038

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07-20-2013, 01:00 AM	#4
Dispect Newbie Car Enthusiast Join Date: Oct 2012 Drives: Asphalt 6MT FR-S Location: Canada Posts: 413 Thanks: 78 Thanked 54 Times in 31 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	will do that tomorrow as it is a little late and dark out. thank you!

07-20-2013, 01:02 AM	#6
Propaganda Diamonds & Cadillacs Join Date: Jul 2012 Drives: '13 fr-s, 1974 911s Location: Internet Posts: 392 Thanks: 162 Thanked 157 Times in 102 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	You could add a resonator in there somewhere. I put a header on my last 4-banger and it was too raspy for my liking. I added in a resonator on the midpipe and it helped out a bit (also killed some drone and made it a tad bit quieter)

07-20-2013, 12:04 PM	#12
Sing4LTS Member Join Date: May 2013 Drives: 13' FR-S Location: La Porte, TX Posts: 32 Thanks: 4 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	What would the header wrap do?

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