Having exhaust problem, need help please - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ngabdala · 12-17-2012, 11:53 PM

On Friday I had a catback exhaust (with resonator) and catted front-pipe installed. The catback is made by mXp. In the DSPORT magazine you can see it is not a loud exhaust as measured dBA. Now, before you go thinking it's the Motiv Concepts catted-front pipe which was not used in the test on DSPORT you should know I know at least a couple people with the Motiv front-pipe w/o cat and they have none of the loudness/drone I have.

Well this exhaust was so loud. Cruising at 65mpg on a 6MT was so loud I had to really raise my voice well to hear myself, the noise made me feel slightly nauseous. It gave me a headache and my ears felt like I just left a music concert. Temporary mild loss of hearing. I needed to lay down when I got home.

On Saturday I took a 45min or so drive. Same problem. After the drive I went home to lay down. My car was parked for two hours until my next drive. Well this time as I was driving it was peaceful. Coasting at 65mph barely had any exhaust noise to it , it was calm and pleasant. After a little while I got to a stop light. When the light turned green I WOT it to redline in first gear, and then redline in second gear. Sure enough this brought the terrible loudness and drone back.

I'm going crazy trying to figure this out. Anyone have any ideas?

chutrain · 12-18-2012, 12:11 AM

Could be the muffler packing still breaking in. Give it some more time for the exhaust to mellow out before going crazy.

Also, have you sat in those cars with the same setup? Different break in periods and perceptions.

ngabdala · 12-18-2012, 12:15 AM

Haven't sat in them. I have been in contact with mXp. The exhaust will get louder in time after some burning off.

I was told it could have something to do with the exhaust flow from my engine.

Idk. Over-pipe comes in later in the week. Maybe I'll discover something. It's been on the lift twice now.

Quote:

Originally Posted by chutrain

Could be the muffler packing still breaking in. Give it some more time for the exhaust to mellow out before going crazy.

Also, have you sat in those cars with the same setup? Different break in periods and perceptions.

Sony · 12-18-2012, 12:26 AM

Check all your exhaust connections...it sounds like you have a loose connection somewhere that is being shifted into and out of alignment. I know one other person had broken exhaust bolts on the flange between the front pipe and the mid-pipe and that was causing noise issues for him. Adding and removing other pipes should NOT make it deafeningly loud, no matter what. Less adding pipes will make it slightly louder and change the tone...but it shouldn't change the volume so much it becomes uncomfortable. I would venture a bet that you have a loose connection somewhere, or something is wrong with the baffles in your muffler.

ngabdala · 12-18-2012, 12:29 AM

I'll be sure to check it out.

Quote:

Originally Posted by Sony

Check all your exhaust connections...it sounds like you have a loose connection somewhere that is being shifted into and out of alignment. I know one other person had broken exhaust bolts on the flange between the front pipe and the mid-pipe and that was causing noise issues for him.

Sony · 12-18-2012, 12:30 AM

If you want bro, I'm not doing anything tomorrow, you could come by my place and we could throw it on the Lift and check everything out. PM me

ngabdala · 12-18-2012, 12:34 AM

Thanks bro. I have no free-time until Saturday or Sunday with work. You're about an hour 40min from me so on a weekday is impossible

Quote:

Originally Posted by Sony

If you want bro, I'm not doing anything tomorrow, you could come by my place and we could throw it on the Lift and check everything out. PM me

Sony · 12-18-2012, 12:36 AM

Quote:

Originally Posted by ngabdala

Thanks bro. I have no free-time until Saturday or Sunday with work. You're about an hour 40min from me so on a weekday is impossible

Well I'm free Sunday if you want, let me know if you're still having issues.

Sportsguy83 · 12-18-2012, 08:14 AM

I bet you left the donut gasket used for the frontpipe in the OEM frontpipe.

(Happened to me).

gmookher · 12-18-2012, 08:20 AM

sounds like ya needs to add a resonator

who is MXP? what are they known for?

microbionic · 12-18-2012, 08:25 AM

perhaps the nauseous feeling was also from a leaky pipe, ...

Gardus@Supersprint · 12-18-2012, 08:27 AM

I think you have a leak before the rear muffler, when the exhaust gets hot it expands, and the leak opens up.
If that's not the case there's something wrong with the exhaust.

12-17-2012, 11:53 PM	#1
ngabdala Vortech Supercharged Join Date: Apr 2012 Drives: WRB BRZ 6MT LTD Location: Massachusetts Posts: 1,447 Thanks: 1,897 Thanked 467 Times in 283 Posts Mentioned: 13 Post(s) Tagged: 1 Thread(s)	Having exhaust problem, need help please On Friday I had a catback exhaust (with resonator) and catted front-pipe installed. The catback is made by mXp. In the DSPORT magazine you can see it is not a loud exhaust as measured dBA. Now, before you go thinking it's the Motiv Concepts catted-front pipe which was not used in the test on DSPORT you should know I know at least a couple people with the Motiv front-pipe w/o cat and they have none of the loudness/drone I have. Well this exhaust was so loud. Cruising at 65mpg on a 6MT was so loud I had to really raise my voice well to hear myself, the noise made me feel slightly nauseous. It gave me a headache and my ears felt like I just left a music concert. Temporary mild loss of hearing. I needed to lay down when I got home. On Saturday I took a 45min or so drive. Same problem. After the drive I went home to lay down. My car was parked for two hours until my next drive. Well this time as I was driving it was peaceful. Coasting at 65mph barely had any exhaust noise to it , it was calm and pleasant. After a little while I got to a stop light. When the light turned green I WOT it to redline in first gear, and then redline in second gear. Sure enough this brought the terrible loudness and drone back. I'm going crazy trying to figure this out. Anyone have any ideas? __________________ Powered by Vortech, ECS Tuning, and JDL Auto Design

12-18-2012, 12:26 AM	#4
Sony Senior Member Join Date: Jul 2011 Drives: 2013 Subaru BRZ MT Limited Location: Somerville, MA Posts: 804 Thanks: 20 Thanked 461 Times in 198 Posts Mentioned: 24 Post(s) Tagged: 0 Thread(s)	Check all your exhaust connections...it sounds like you have a loose connection somewhere that is being shifted into and out of alignment. I know one other person had broken exhaust bolts on the flange between the front pipe and the mid-pipe and that was causing noise issues for him. Adding and removing other pipes should NOT make it deafeningly loud, no matter what. Less adding pipes will make it slightly louder and change the tone...but it shouldn't change the volume so much it becomes uncomfortable. I would venture a bet that you have a loose connection somewhere, or something is wrong with the baffles in your muffler. __________________ Silver 2006 Toyota Tacoma Double Cab 4WD Longbed, Name: Loki - God of Mischief and Chaos WRB 2013 Subaru BRZ Limited MT, Name: Zeus - Father of all God's and God of Sky and Thunder Perrin Cat-Back, ECUTek Tune by Kaizen Tuning, Perrin Silicone Radiator Hoses, Perrin Master Cylinder Brace, Perrin True Cold Air Intake

12-18-2012, 12:30 AM	#6
Sony Senior Member Join Date: Jul 2011 Drives: 2013 Subaru BRZ MT Limited Location: Somerville, MA Posts: 804 Thanks: 20 Thanked 461 Times in 198 Posts Mentioned: 24 Post(s) Tagged: 0 Thread(s)	If you want bro, I'm not doing anything tomorrow, you could come by my place and we could throw it on the Lift and check everything out. PM me __________________ Silver 2006 Toyota Tacoma Double Cab 4WD Longbed, Name: Loki - God of Mischief and Chaos WRB 2013 Subaru BRZ Limited MT, Name: Zeus - Father of all God's and God of Sky and Thunder Perrin Cat-Back, ECUTek Tune by Kaizen Tuning, Perrin Silicone Radiator Hoses, Perrin Master Cylinder Brace, Perrin True Cold Air Intake

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12-18-2012, 08:20 AM	#10
gmookher Banned Join Date: Aug 2012 Drives: VortechSC,BorlaEL,Perrin,GCRace Location: HighHeatHighAltitudeAZ,USA Posts: 2,254 Thanks: 458 Thanked 669 Times in 394 Posts Mentioned: 9 Post(s) Tagged: 2 Thread(s)	sounds like ya needs to add a resonator who is MXP? what are they known for?

12-18-2012, 08:25 AM	#11
microbionic Senior Member Join Date: Nov 2012 Drives: 2013 Subaru BRZ Location: NE Ohio Posts: 248 Thanks: 452 Thanked 146 Times in 77 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	perhaps the nauseous feeling was also from a leaky pipe, ...

12-18-2012, 08:27 AM	#12
Gardus@Supersprint Banned Join Date: Nov 2011 Drives: Clio TCE Location: Mantova - Italy Posts: 494 Thanks: 17 Thanked 154 Times in 70 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I think you have a leak before the rear muffler, when the exhaust gets hot it expands, and the leak opens up. If that's not the case there's something wrong with the exhaust.

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