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  #41 (permalink)  
Old 05-20-2016, 05:18 PM
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Before and after shots:

It does not rattle, it is a little quieter, and does not choke off power, but then I'm only making about 420 hp at the flywheel.... If I get tired of these inserts I can put others in easily. Some looks are sacrificed for this setup but it sure is convenient.

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  #42 (permalink)  
Old 05-17-2020, 08:22 AM
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Default Can this be the same issue?

Finally got to drive my new Backdraft but I'm hearing what appears to be this annoying rattling when the car is deaccelerating, as if the heat shields are ready to fall off. What is that? A major distraction!
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  #43 (permalink)  
Old 05-17-2020, 08:40 AM
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Default Exhaust Rattle? What is it?

Finally got to drive my new Backdraft but I'm hearing what appears to be this annoying rattling when the car is deaccelerating, as if the heat shields are ready to fall off. A major distraction! What is that?

Any insight is appreciated.

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  #44 (permalink)  
Old 05-17-2020, 05:23 PM
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I had the same problem im guessing itis loose baffles on the inside and below where you can not see drill a pilot screw then use I think it was a 1 inch self tapping screw into the baffle it worked for me
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  #45 (permalink)  
Old 05-17-2020, 09:29 PM
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Quote:
Originally Posted by novasscnc View Post
I had the same problem im guessing itis loose baffles on the inside and below where you can not see drill a pilot screw then use I think it was a 1 inch self tapping screw into the baffle it worked for me
So is this a defect in the side pipe exhaust?
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  #46 (permalink)  
Old 05-18-2020, 06:34 AM
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Quote:
Originally Posted by Gus M View Post
So is this a defect in the side pipe exhaust?
It's a characteristic of the type of baffles they use.
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Old 05-18-2020, 08:53 AM
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I had a similar sound from my FFR pipes. It turned out to be a crack in the body of the side pipe.
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  #48 (permalink)  
Old 05-20-2020, 11:04 PM
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Quote:
Originally Posted by MKS427 View Post
I had a similar sound from my FFR pipes. It turned out to be a crack in the body of the side pipe.
Was the crack visible to the eye or did you need to take it in?

I've seen my exact same car, with same equipment that DID NOT have the noise I'm experiencing.
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  #49 (permalink)  
Old 05-21-2020, 11:42 AM
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Quote:
Originally Posted by Mark Brye View Post
I had a sound similar to what you guys are talking about. I pulled the side pipe off and put it on my bench and started taping on it to see if I could make the sound. What mine turned out to be was a rock that made its way in between the four primary pipes and made its way down to the collector on the outside of the exhaust. It made a horrid racket. Turned the pipe on edge and the rock rolled out.
So this has happened twice now in the 14 years I have had my BDR. Little rock between the 4 to 1 side pipe collector. On outside of exhaust but rattling between the 4 tubes. Made a real racket both times. Had to take side pipe off and turn on end to get the bugger out.
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  #50 (permalink)  
Old 05-23-2020, 08:53 AM
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The reason is the flat surface in the picture.....as the air exits , it causes wierd vortices in the pipe..right there ....the way to fix is to cone the exits there into the pipe for a smooth exit transition.
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Old 05-23-2020, 04:11 PM
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Originally Posted by CHANMADD View Post
The reason is the flat surface in the picture.....as the air exits , it causes wierd vortices in the pipe..right there ....the way to fix is to cone the exits there into the pipe for a smooth exit transition.
Educate me on how to fix this...what does that mean to "cone" the exits... Sorry for my ignorance on that issue.
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  #52 (permalink)  
Old 05-24-2020, 04:34 AM
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Quote:
Originally Posted by Cashburn View Post
It's a characteristic of the type of baffles they use.
I also have a similar sound on my SPF Daytona Coupe with a 427sr. So I suspect your are spot-on cashburn it is the characteristic of the pipe design.

Thanks

Jeff
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  #53 (permalink)  
Old 05-24-2020, 08:12 AM
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I just wish it was easier to post pictures......I could sketch what I mean.....I always make my own pipes and experienced this in the one setup I had.....it's definitely what I said ...it's like a flatulant type of sound on deceleration. On deceleration the air is drawn back into the pipe and hits that flat brick wall and rattles everything..

Last edited by CHANMADD; 05-24-2020 at 08:15 AM..
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