Need to kill Magnaflow Y Pipe and catback drone - Defender Source
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  #1  
Old August 8th, 2014, 10:55 AM
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Need to kill Magnaflow Y Pipe and catback drone

The entire inside of the truck is already dynamatted and dynalined and the drone at 70+ is still unbearable. Is having a resonator welded in the solution?
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  #2  
Old August 8th, 2014, 11:14 AM
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get a stock muffler or dont drive so fast.
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  #3  
Old August 8th, 2014, 11:37 AM
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stock muffler will help a ton, as will driving in the middle lane as opposed to up against the median concrete barrier.
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  #4  
Old August 8th, 2014, 11:59 AM
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http://www.amazon.com/s/ref=nb_sb_ss...b%2Caps%2C1207



.
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  #5  
Old August 8th, 2014, 12:04 PM
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Quote:
Originally Posted by Nomar View Post
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  #6  
Old August 8th, 2014, 12:17 PM
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Originally Posted by rijosho View Post
stock muffler will help a ton, as will driving in the middle lane as opposed to up against the median concrete barrier.
This is a sad reflection on the amount of crap we put up with and still driver our trucks.

x2 on a stock exhaust. Who the F wants to hear the exhaust all the time anyway? Get a sports car if you do.
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  #7  
Old August 8th, 2014, 12:28 PM
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yes the resonator will help.
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  #8  
Old August 8th, 2014, 01:15 PM
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Its also worth noting that Brad has the quietest Defender I have ever driven. Its almost like driving a normal vehicle. Once you hit 70 the droning noise is pretty bad.
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  #9  
Old August 8th, 2014, 01:53 PM
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I'm going to to try the resonator and if that doesn't work, looks like its noise canceling earphones!
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  #10  
Old August 8th, 2014, 02:07 PM
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AFAIK most modern vehicles use a suitcase muffler to remove the drone.
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  #11  
Old August 8th, 2014, 02:10 PM
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Originally Posted by Nomar View Post
My thoughts exactly. Best improvement I have found for my bare metal experience.

Though a marine friend swears by this stuff and he is in the commercial side of the shipping business. Drives a boat in and around Boston Harbor most days

http://www.silentcoating.com/
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  #12  
Old August 8th, 2014, 03:17 PM
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I ran my exhaust tip straight back. It ends next to the tanks cradle. Huge improvement at 70+mph.

Clay
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  #13  
Old August 8th, 2014, 03:39 PM
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I ran my exhaust tip straight back. It ends next to the tanks cradle. Huge improvement at 70+mph. Clay
Clay, any chance you have a pic you can share?
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  #14  
Old August 8th, 2014, 03:47 PM
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I'll get you one.
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  #15  
Old August 8th, 2014, 03:58 PM
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Quote:
Originally Posted by 1of40 View Post
I ran my exhaust tip straight back. It ends next to the tanks cradle. Huge improvement at 70+mph.

Clay
This might be okay for the wagons, but it does tend to cause a lot of exhaust to be pulled back into the soft tops at speed. This is how I had modified mine for off road, now I need a solution for the street..

(not the best picture, sorry)
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  #16  
Old August 8th, 2014, 04:11 PM
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Originally Posted by blaughva View Post
The entire inside of the truck is already dynamatted and dynalined and the drone at 70+ is still unbearable. Is having a resonator welded in the solution?
Engine exhaust drone or exhaust line vibrating drone? There is a chance +/- 70mph happens to be the natural harmonic frequency of your exhaust system when coupled with the other vibrating items. For a test, try wedging something between the frame and exhaust to stiffen it, like a 2x4 cut to size. Strap it down so it does not fly off. If that works, dump the wood and try adding another pipe hanger or two.
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  #17  
Old August 8th, 2014, 04:35 PM
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FWIW the exhaust on mine is only noticeable at idle. Once on the move, the tires and drivetrain noise quickly take over. Have supply of ear plugs in the car.
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  #18  
Old August 8th, 2014, 04:36 PM
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all you have to do to remove the drone is cut the exhaust all the way back to the manifold

that way when your ears start bleeding all of the noise goes away lol
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  #19  
Old August 8th, 2014, 04:39 PM
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Quote:
Originally Posted by down_shift View Post
Engine exhaust drone or exhaust line vibrating drone? There is a chance +/- 70mph happens to be the natural harmonic frequency of your exhaust system when coupled with the other vibrating items. For a test, try wedging something between the frame and exhaust to stiffen it, like a 2x4 cut to size. Strap it down so it does not fly off. If that works, dump the wood and try adding another pipe hanger or two.
I really believe it is engine exhaust drone, but I'll give that a shit just to be sure.
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  #20  
Old August 8th, 2014, 04:42 PM
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Quote:
Originally Posted by Rocky View Post
Have supply of ear plugs in the car.
A must have for long highway trips in a soft top (Which is quieter with the top off.. LOL!)
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