07-07-2016, 06:07 AM | #1 |
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X5M f85 catless downpipes with stock exhaust setup issue**
Hey guys I found this post which is over 3 years old in regards m6 making a horrible sound that resembles a old beater Honda Civic with exhaust issues. This horrible sound only occurs at low revs between 1500- 2500 RPM and especially while under load or going uphill.
I found this interesting because I started experiencing the same Sound after installing the super sprint catless downpipes I read some post regarding the waste gate Making some rattling noise however this sound seems to be coming from the muffler .... Has anyone else had this same issue Click on this link below to read the original post with the video Originally Posted by luigimaster24 http://www.6post.com/forums/showthre...=877884&page=3 Last edited by Joey26; 07-07-2016 at 06:30 AM.. |
07-07-2016, 10:23 AM | #2 |
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It's called wastegate rattles, it exists with stock DPs but muffled by the cat converters. Thread below, to sum it up you need to drive in Sport mode to avoid rattle sound with catless DPs. Not sure if any reported wastegate rattles on the F85.
http://f10.m5post.com/forums/showthread.php?t=872199 See post #17: http://f10.m5post.com/forums/showthread.php?t=873009
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11-18-2016, 06:53 AM | #4 |
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I have stock muffler with catless downpipes, Active Autowerke, I like it, sounds deeper than a "beater civic". It sounds like a mix between F10 M5 and an F80. Check out my instagram page @BMWadrenaline, I have some videos, most at wide open throttle, but it would give you an idea of what it sounds like.
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11-19-2016, 03:44 PM | #5 | |
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However I just installed 100 cell hi flow cats further down the exhaust pipe and now it sounds much better pretty much the same very loud pops and that nice v8 rumble without that sound distortion |
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11-27-2016, 10:03 AM | #8 |
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Here is my customer's X5M with ER catless downpipe and stock muffler.
https://instagram.com/p/BD9HuiyH7Fa/
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11-27-2016, 10:04 AM | #9 | |
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