[NYBimmer535]

Has anyone that installed notice notice a super high pitched whistle in the mid RPM range?, i just got mine on and from like 1800-3200rpm it sounds like an alternator belt is slipping

[BimmerHausPerformance]

Check out my YT channel and some of the videos of my intakes, that is normal turbo noise if it sounds like those in my videos.

[mike@x-ph.com]

Originally Posted by BrowBMW

Check out my YT channel and some of the videos of my intakes, that is normal turbo noise if it sounds like those in my videos.

[NYBimmer535]

Originally Posted by BrowBMW

Check out my YT channel and some of the videos of my intakes, that is normal turbo noise if it sounds like those in my videos.

i took a look through a ton of videos and came onto yours and didnt hear anyone else with it.

https://www.youtube.com/shorts/vux7EV6Dbf8

I was able to record this lastnight to try and see if anyone could identify the sound, you can hear it pretty well at the start, And then twords the end it starts again for a second or so, Stops, Then starts again.

it reminds me of those long tubes you had as a kid to spin around and make a whistling noise

[BimmerHausPerformance]

That is completely normal - you are getting unfiltered turbo boost induction down a pipe. So you being reminded of the tubes that whistle is exactly right!!! listen to this:

BMW 528i F10 N20 Behind the Grill Custom Air Intake
https://youtu.be/xUlfBZo254o

[NYBimmer535]

Originally Posted by BrowBMW

That is completely normal - you are getting unfiltered turbo boost induction down a pipe. So you being reminded of the tubes that whistle is exactly right!!! listen to this:

BMW 528i F10 N20 Behind the Grill Custom Air Intake
https://youtu.be/xUlfBZo254o

Yep i assumed so. i was able to actually replicate the issue without moving too, Reving to about 4k rpm and letting off while sitting still will also make the noise and its LOUD, sounds like a train horn, the unfortunate downside i guess, The turbo spool and stock BPV sound amazing enough to make up for it tho

[mike@x-ph.com]

Originally Posted by NYBimmer535

Yep i assumed so. i was able to actually replicate the issue without moving too, Reving to about 4k rpm and letting off while sitting still will also make the noise and its LOUD, sounds like a train horn, the unfortunate downside i guess, The turbo spool and stock BPV sound amazing enough to make up for it tho