04-09-2020, 10:21 AM | #1 |
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"Trumpet" sound with Downpipes
Does anyone else get that funky trumpeting sound after installing catless downpipes? Sounds kinda like some of the riced out hondas at certain throttle and rpms.
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04-09-2020, 12:58 PM | #2 |
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Drives: '13 F10 M5 | '15 F15 X5
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Umm not sure whatcha talking about. Is it kind of a rasping noise?
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04-09-2020, 01:18 PM | #3 |
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I'll try to get video of it. Trumpeting may not be the best way to describe it, but under certain conditions it makes an exhaust note that just doesn't appeal to me. Seems like it is related to the operation of either the wastegates or the valves in the mufflers.
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04-09-2020, 02:06 PM | #4 |
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04-10-2020, 06:07 PM | #8 | |
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I installed them and other than one of the brackets not lining up properly, they seemed to be well sealed and seated. I will probably look it over again on Sunday to see if I can find anything. |
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04-12-2020, 02:16 PM | #9 |
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Dug back into it today. I couldn't find any obvious problems, so I gutted the stock cats and put them back on. Obviously less aggressive sound now, but so much better without the trumpet.
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04-16-2020, 04:41 PM | #11 |
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oh, you got some ebay downpipes from the classifieds on here. yea, thats why you dont buy ebay downpipes or parts in general.
and now i know why guys on here say to gut oem pipes, and they usually had ebay DPs. buy expensive downpipes. my car sounds like a f'n monster. no muffler |
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04-16-2020, 08:43 PM | #12 |
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I'll agree with you to an extent that you get what you pay for, but what is it about a cheap downpipe that makes it sound shitty compared to an expensive downpipe? Stainless pipe is stainless pipe. There isn't really anything there to make it sound different.
I truly believe there is something else going on to make my car sound that way. I can still recreate the sound with the gutted cats, it's just way less noticeable. |
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05-05-2020, 10:12 PM | #13 | |
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