RPI Exhaust Droning
04-19-2009, 07:26 AM
#21
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Originally Posted by mrfva' post='851679' date='Apr 19 2009, 11:04 AM
PM flyingpuck regarding an exhaust cone that could potentially reduce the droning. 
You can read more from Dave's postings,
http://forums.e60.net/index.php?act=Search...%2Bcone+droning
You can read more from Dave's postings,
http://forums.e60.net/index.php?act=Search...%2Bcone+droning
04-19-2009, 07:36 AM
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Originally Posted by Krozi' post='851690' date='Apr 19 2009, 10:26 AM
Ok I PM'd flyingpuck about the cone. It's just that I am worried that no one has the drone that I do.
Have you checked to make sure that the exhaust was hung on the rubber mounts properly?
04-19-2009, 07:44 AM
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Originally Posted by mrfva' post='851697' date='Apr 19 2009, 11:36 AM
It [droning] may be a subjective matter
Have you checked to make sure that the exhaust was hung on the rubber mounts properly?
Have you checked to make sure that the exhaust was hung on the rubber mounts properly?
04-19-2009, 08:57 AM
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Ok, I just took a look into the exhaust. I found that each cylinder has a bump. Is this normal?
Sorry for the annoying questions, I just want to track down this droning problem.
Sorry for the annoying questions, I just want to track down this droning problem.
04-20-2009, 07:04 AM
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Originally Posted by Krozi' post='851736' date='Apr 19 2009, 12:57 PM
Ok, I just took a look into the exhaust. I found that each cylinder has a bump. Is this normal?
Sorry for the annoying questions, I just want to track down this droning problem.
Sorry for the annoying questions, I just want to track down this droning problem.
04-20-2009, 07:11 AM
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Is this a cat-back or just the muffler you have from RPI? If you have a straight through muffler like this, there is bound to be some droning. Your possible solutions would be to add resonators or replace the muffler .
04-20-2009, 07:12 AM
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My Ride: 2008 Silverstone II E60 M5 2012 E70 AW X5 50i Sport w/ LCI Aero Kit and Rocker Panels
Dynamat is cheap. I had to do my entire underbelly of my car too, since I have all 3 sections and it was pretty cheap. I think I paid around $140 for enough material to layer this entire area. I put the mat in so only the outside would sound like a fighter jet was flying by. I didn't need the passengers inside to know a F-16 was on top of them. 
Biiiiiiiiiiya!
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04-20-2009, 07:21 AM
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Originally Posted by C's Bimmer' post='852718' date='Apr 20 2009, 11:12 AM
Dynamat is cheap. I had to do my entire underbelly of my car too, since I have all 3 sections and it was pretty cheap. I think I paid around $140 for enough material to layer this entire area. I put the mat in so only the outside would sound like a fighter jet was flying by. I didn't need the passengers inside to know a F-16 was on top of them.
Biiiiiiiiiiya!
Biiiiiiiiiiya!
04-20-2009, 07:26 AM
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I called the shop where I got it installed and they are going to take a look at it.
04-20-2009, 07:32 AM
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Originally Posted by Krozi' post='852735' date='Apr 20 2009, 11:26 AM
I called the shop where I got it installed and they are going to take a look at it.