exhaust whistle at higher RPM
01-27-2012, 02:04 PM
#1
Contributors
Thread Starter
Join Date: Sep 2008
Location: Round Rock, TX
Posts: 407
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 05' 545i
so I have this Borla exhaust and it seems to whistle at higher RPMs. I checked for a hole but no leaks in the exhaust.
Here is clip from the outside..you can hear a slight crackle at the top range..
not bad until your are in the cabin - you can hear it over the music @ 25sec in and when I hit 4k rpm
another cabin clip..longer video, only applicable part is @ 20 sec so you don't have to go through the whole thing
Anyone have any thoughts or is it time to get a new exhaust?
Here is clip from the outside..you can hear a slight crackle at the top range..
not bad until your are in the cabin - you can hear it over the music @ 25sec in and when I hit 4k rpm
another cabin clip..longer video, only applicable part is @ 20 sec so you don't have to go through the whole thing
Anyone have any thoughts or is it time to get a new exhaust?
01-27-2012, 05:38 PM
#2
Senior Members
Join Date: Oct 2009
Location: Indiana, USA
Posts: 1,380
Likes: 0
Received 3 Likes
on
3 Posts
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
Sounds more like an intake whistle to me. Got anything aftermarket for the intake?
01-27-2012, 06:38 PM
#3
Contributors
Thread Starter
Join Date: Sep 2008
Location: Round Rock, TX
Posts: 407
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 05' 545i
negative ghostrider, stock intake box with k/n --- carbon filter delete, but these were the first "mods" I did on the car, before the exhaust. Never had this sound then. I was thinking maybe a cracked intake manifold but engine is fine (no misses, hesitation or stall) coolant is fine as well, the sound really comes from the exhaust and not from front or center of car either.
Thread
Thread Starter
Forum
Replies
Last Post