Borla Exhaust Problem


SuperB

SuperB

Board of Directors/Owner
Mark IV Lifetime
Feb 8, 2006
954
South Florida
I had the Borla Exhaust installed a few months back, sounds great.
Recently, there seems to be a nasally sound at around 2K RPM, like a second note. Sounds like my GT has a cold. :ack Comes from the right side mostly.

Wondering if anyone else had a similar issue and what everyone thinks it could be. I was thinking at first it might be a blown seal, but I'd expect to see evidence of that (black soot or something). I am now kinda thinking it may be a loose baffle inside the muffler.

I don't expect to get it looked at prior to the rally, so I guess it will still be sick. Don't worry, I don't think it's contagious :wink
 
I had a similar experience with mine right after I installed it. I had driven it on a test run of about 30 miles and when I stopped to open the garage door it was making a peculiar knocking sound at idle that immediately went away with an increase in RPM. I had also heard a peculiar fluttering sound the first time I really got on it and ran it up to redline. I shut it down and let it cool off overnight and visually checked everything out the next morning - even "knocking around" the Borla to see if I could make it rattle. I then went on a longer drive of about 80 miles and ran it pretty hard. The noise disappeared and so far has not come back. It was as if something was loose inside and then got "puked" out the tail pipes. It's still a mystery to me. :eek
 
Have you boys got just the can or also the headers?? The headers can make that knocking sound if its leaking from just one of the pipes...
 
My noise started after 1,000 miles were put on it. There is no knocking noise at all, just a stuffy noise noise.
 
Brian-

I've got about 500 miles on my Borla and do not have any noises or issues. Do you think one of the bolts that hold the muffler to the cat pipes might have come loose?

-Chris
 
I don't know. I checked what I could see without a screwdriver and it all seems fine. Really sounds to me like a baffle came loose, performance does not seem to be affected.
 
SuperB said:
I don't know. I checked what I could see without a screwdriver and it all seems fine. Really sounds to me like a baffle came loose, performance does not seem to be affected.
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Have you tried a stethoscope? I used one to listen to various parts of the exhaust system when I was trying to diagnose the noise. You can get them at any auto parts store for less than $10.00.
 
I'll let the dealer play doctor when I get back, I don't have the proper white coat or busty nurse to assist me. :biggrin
 
Maybe Bony would let Bouncy assist :eek
 
You guys can't be serious. A stethescope on a high performance muffler? It had better be a very low grade scope, cause otherwise you'll be deafened! Be careful doing this.
 
I've got 1400 miles on my Borla and no SuperB symptoms such as "stuffy noise noise". I believe you are trailering to Detroit and Borla has signed on as a convention sponsor. They certainly will have some tech people in attendance. You could have them give a listen and possibly diagnose..
I am very pleased with my Ford Motor Racing/Borla muffler addition.
 
fjpikul said:
You guys can't be serious. A stethescope on a high performance muffler? It had better be a very low grade scope, cause otherwise you'll be deafened! Be careful doing this.
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I was referring to an "automotive" stethescope with a metal rod at the listening end. I use it on the "box" part of the muffler to hear what is going on - not the exhaust pipe end! :eek It comes in very handy for diagnosing bearing noises, pump noises, etc.
 
Boy, you guys just don't get pathological humor. Hey, bring it with you. Maybe we can fool Piccola and play doctor!
 
I am pleased with the Borla as well, just started acting up, may not be the muffler at all, I just don't know.

Would be cool if the borla guys at the rally can take a look/listen.

:wink I did put there name on the banners I am printing :wink
 
fjpikul said:
Boy, you guys just don't get pathological humor. Hey, bring it with you. Maybe we can fool Piccola and play doctor!
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What do you expect from "gearheads", But I love to play Doctor! :banana
 
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