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BMW 3-Series (E90 E92) Forum
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New here, looking for advice on exhaust drone
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03-23-2015, 01:21 PM | #1 |
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New here, looking for advice on exhaust drone
Im new here to the forum but not the to the bmw scene. I have an e90 n54 SG 335i. I have catl$$ downpipes. Completely stock middle's and an DInan free flow exhaust. Sounds okay until 4,000rpm. At 4,000+ it sounds like I'm in a honda. My question is would taking out the rear CATS and installing a pair of 1792 Vibrant resonators help with the drone and make the car sounds better? I absolutely hate the way it sounds now
Last edited by ONE_slow_m5; 07-02-2015 at 10:02 PM.. |
03-23-2015, 02:48 PM | #2 |
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Cats usually quiet exhausts down more than resonators.... maybe you should just install resonators and leave the midepipe cats on there... how often are you driving around at 4k RPM anyways...?
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03-23-2015, 04:02 PM | #3 | |
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Which downpipes do you have? You should have no drone after 4000 rpm ( most guys notice a drone from 1600 - 2000 rpm only)
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03-23-2015, 10:00 PM | #4 | |
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Also I'm sorry I don't mean drone I mesn rasp! Lots and lots of rasp . Was thinking I can make it louder removing the rear cats and putting the resonators in place. I want it louder just no rasp . |
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03-24-2015, 10:52 AM | #6 |
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03-24-2015, 03:28 PM | #7 |
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Sorry to thread jack but it seems OP question was answer. I just wanted everyone opinion on the VRSF catless DP and drone. When I was researching (maybe not well enough). All I heard wer glowing reviews of these DP's. And no mention of drone.
They fit wonderful on the n54 but I have to say there is a healthy drone from 2800-3k on my MT 2009 car. Has anyone experienced this. Is there anyway to quell the drone? |
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03-24-2015, 03:39 PM | #8 | |
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If you're getting drone on Catless Downpipes alone, there's a problem with your exhaust. No two CATLESS downpipes on this platform will have any noticeable sound variation. It's all just straight pipe and the exact same size. |
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03-27-2015, 08:06 PM | #9 |
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Interesting.. What could possibly be wrong then? It funny.. cause there is noticeable drone at 28-3000 RPMs. And I also noticed that if I floor it in 5th or 6th gear there seems to be a healthy drone as well. Doesnt do it in the other gear just seems to happen when it is loaded up in 5th and 6th. Can you install these things improperly somehow to cause this? Just doesnt seem obvious to me how that is possible.
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03-28-2015, 01:01 AM | #10 |
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I think installing an x pipe if you dont already have one may help as the x pipe helps direct the two air streams better when they cross over compared to a H pipe found in most aftermarket exhaust set ups.... or so I have read
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03-28-2015, 01:26 AM | #11 |
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So I'm confused ?? ... Is it a case by case basis ??? As I was planning on just doin down pipes but will that cause drony rasp with the stock exhaust ? As I don't want that lol
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