D&D FC Louvered wrapped baffle vs Perforated wrapped baffle
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Road Captain
Joined: Jan 2010
Posts: 709
Likes: 2
From: SO Cal
D&D FC Louvered wrapped baffle vs Perforated wrapped baffle
I just installed a D&D Fat Cat exhaust system on my 2010 Street Glide stock 96 motor with stage one air cleaner and Harley stage one down load. It was shipped to me with the wrong baffle installed so I was able to compare the Perforated wrapped and the Louvered wrapped baffles. I ran some sound tests and thought that some may find this information helpful. It came to me with the Perforated wrapped baffle and it was way too loud for me. It popped badly on deceleration and was uncomfortable to my ears. I installed the Louvered wrapped baffle today and love it, no popping on deceleration and much better on my ears. I recorded the Db levels using SAE J2825 method (20 inches away form the pipe at a 45 degree angle at both idle and at 2000 RPM.) I also tested them at 3000 RPM.
Perforated wrapped :
Idle 96 Db
2000 103 Db
3000 108 Db
Louvered wrapped:
Idle 91 Db
2000 100 Db
3000 105 Db
The Louvered wrapped pulled much smother and felt like the torque came in sooner. As expected the Perforated wrapped was a little better on top end but way to loud for me.
Perforated wrapped :
Idle 96 Db
2000 103 Db
3000 108 Db
Louvered wrapped:
Idle 91 Db
2000 100 Db
3000 105 Db
The Louvered wrapped pulled much smother and felt like the torque came in sooner. As expected the Perforated wrapped was a little better on top end but way to loud for me.
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Road Captain
Joined: Jan 2010
Posts: 709
Likes: 2
From: SO Cal
I agree, as stated more on top end.
Road Captain
Joined: Sep 2005
Posts: 555
Likes: 75
From: California
Hey great info. I ordered mine and picked the concentric baffle which is made for your 96" motor and not my 103"...so I was researching on which new baffle to get for mine. I was leaning towards the perf. wrapped over the Louvered baffle you like simply because I like a bit more rumble at idle. I see your sound test confirms that, and it doesn't seem to get that much louder as it ramps up. Great info and just what I needed to help me make my decision. Thank you.
PS> how much was your baffle? Did you buy direct from D&D?
PS> how much was your baffle? Did you buy direct from D&D?
Thread Starter
|
Road Captain
Joined: Jan 2010
Posts: 709
Likes: 2
From: SO Cal
Hey great info. I ordered mine and picked the concentric baffle which is made for your 96" motor and not my 103"...so I was researching on which new baffle to get for mine. I was leaning towards the perf. wrapped over the Louvered baffle you like simply because I like a bit more rumble at idle. I see your sound test confirms that, and it doesn't seem to get that much louder as it ramps up. Great info and just what I needed to help me make my decision. Thank you.
PS> how much was your baffle? Did you buy direct from D&D?
PS> how much was your baffle? Did you buy direct from D&D?
Road Captain
Joined: Oct 2007
Posts: 597
Likes: 1
From: Texas
I just installed a D&D Fat Cat exhaust system on my 2010 Street Glide stock 96 motor with stage one air cleaner and Harley stage one down load. It was shipped to me with the wrong baffle installed so I was able to compare the Perforated wrapped and the Louvered wrapped baffles. I ran some sound tests and thought that some may find this information helpful. It came to me with the Perforated wrapped baffle and it was way too loud for me. It popped badly on deceleration and was uncomfortable to my ears. I installed the Louvered wrapped baffle today and love it, no popping on deceleration and much better on my ears. I recorded the Db levels using SAE J2825 method (20 inches away form the pipe at a 45 degree angle at both idle and at 2000 RPM.) I also tested them at 3000 RPM.
Perforated wrapped :
Idle 96 Db
2000 103 Db
3000 108 Db
Louvered wrapped:
Idle 91 Db
2000 100 Db
3000 105 Db
The Louvered wrapped pulled much smother and felt like the torque came in sooner. As expected the Perforated wrapped was a little better on top end but way to loud for me.
Perforated wrapped :
Idle 96 Db
2000 103 Db
3000 108 Db
Louvered wrapped:
Idle 91 Db
2000 100 Db
3000 105 Db
The Louvered wrapped pulled much smother and felt like the torque came in sooner. As expected the Perforated wrapped was a little better on top end but way to loud for me.
It isn't worth the cost of the quiet muffler for at most a 5 decibel reduction.
Thanks for taking the time to do this. Dave
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