04-15-2024, 01:39 AM | #1 |
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Slight drone with valvetronic midpipe?
Hey guys! I was wondering if ya’ll can give me some advice on this and what I should do
So I recently installed a valvetronic midpipe on my car(1st gen), as well as a dahler valve controller I noticed if i open the flaps and drive there is a decent amount of interior drone when driving in 2nd gear + in rpm ranges from 1.5-3k rpm’s, nobody I drive with really notices but it’s been getting on my nerves when I need to drive up a hill in 4th Anyone know is this a problem with all the mid pipes? Does the newer valvetronics midpipe fix this issue? Should I go the AA or IRL midpipe instead? What do you guys think I should do, this drone really kills the enjoyment of the car My car is the 6MT if that makes a difference Thanks in advance |
04-15-2024, 06:31 AM | #2 |
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It's normal, pretty much every exhaust will have some drone.
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04-15-2024, 06:38 AM | #3 |
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This....I have the MAD non-resonated and hit drones at times in the 2k rpm range at time when the valves are at 100%. You eventually get use to it. You can also just put it in stock mode if you have a valve controller.
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04-15-2024, 06:50 AM | #4 |
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Yup the valve controller contributes to it, that's probably why the valves don't fully open at part throttle.
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04-15-2024, 09:59 AM | #6 |
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This^ Typically way more noticeable with a valve controller. This is the first bmw I have had that doesn't allow fully open valves in stock configuration.
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04-16-2024, 01:29 AM | #7 |
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Thanks for the reply guys! It all makes sense about the drone, when I default to the standard sport plus without activating my valve controller the drone is non existent, but once I open the flaps that’s when the drone appears, if there isn’t a fix then It is what it is! Thanks for the reassurance guys
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04-16-2024, 07:59 AM | #8 |
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Have you tried turning off the exhaust sound control button and opening the valves with your controller? Maybe the fake noise is causing part of the issue
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04-16-2024, 09:52 AM | #9 | |
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Quote:
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04-16-2024, 10:17 AM | #10 |
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in my opinion, disabling the fake sound does help
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04-16-2024, 05:34 PM | #11 |
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Just incase you happened to not know. I connected my mirror buttons to open / closed (stock) on Dahler controller. Easy as it gets to go stock efficient mode when I’m wanting 0 drone (EL Valvetronic v2 midpipe)
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Info@mad-us.com1969.50 |
04-17-2024, 10:18 AM | #12 |
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Thats the way to do it
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04-17-2024, 03:53 PM | #13 |
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I just did the valvetronic axle back with the valvetronic el mid pipe. What a difference. Mid pipe alone I never drove around with the valves open unless I was in sport/sport+ mode because it did drone a little bit. Once I put the axle back, the drone is not as apparent when driving in comfort modes and I tend to drive with the valves open a lot more. IMO the stock muffler holds a lot of noise in the cabin.
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04-17-2024, 04:18 PM | #14 | |
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Quote:
If looking to switch midpipes, we like the Evolution Racewerks midpipes, they fit and sound great.
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04-18-2024, 10:19 AM | #15 |
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Correct, it muffles a lot of noise, and that could be good or bad depending on the person.
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