Diverter valve noise?

Bt12 · 05-27-2018, 07:36 AM

So maybe I wasn’t listening before but today it’s pouring hard in the tri-state area. So en route to the gym. I can hear the diverter valve dump air back into the intake. For those that don’t know what it sounds like... it sounds kind of like a blow off valve. But not as pronounced

I have ASD turned off. I’m stock

Doesn’t bother me but I definitely can hear it.

McPurrs · 05-29-2018, 09:38 AM

I swapped the air filter to a KN air filter and I can really hear it all of the time (radio off). I like it.

Bt12 · 05-29-2018, 05:04 PM

Quote:

Originally Posted by McPurrs

I swapped the air filter to a KN air filter and I can really hear it all of the time (radio off). I like it.

You do the rectangle drop in one? I assume you like it

McPurrs · 05-30-2018, 09:30 AM

Quote:

Originally Posted by Bt12

You do the rectangle drop in one? I assume you like it

Perfect fit in the stock airbox. Yes, I like it.

AndrewC1989 · 05-30-2018, 09:51 AM

It's amazing how much of the engine you can actually hear after you get rid of asd. With a dp/sport cat you can hear the turbo whistle when it's spooling up. So intoxicating.

S2kM2dan · 05-30-2018, 10:44 AM

i want to hear the turbo spool so bad. I can barely hear it now.

K&N seems tempting but I also read a lot about the oil filters causing issues with the MAF..

Bt12 · 05-30-2018, 04:51 PM

Quote:

Originally Posted by S2kM2dan

i want to hear the turbo spool so bad. I can barely hear it now.

K&N seems tempting but I also read a lot about the oil filters causing issues with the MAF..

I thought the oil MAF thing really didn’t have that much supporting data. I thought that was disproven a while ago

McPurrs · 05-31-2018, 09:57 AM

Quote:

Originally Posted by S2kM2dan

i want to hear the turbo spool so bad. I can barely hear it now.

K&N seems tempting but I also read a lot about the oil filters causing issues with the MAF..

K&N was not greasy at all. If it is after cleaning, too much oil was used. I can hear it spool with just the drop in.

S2kM2dan · 05-31-2018, 10:56 AM

Quote:

Originally Posted by Bt12

I thought the oil MAF thing really didn’t have that much supporting data. I thought that was disproven a while ago

Oh, I guess I read old threads.

Thanks!

Quote:

Originally Posted by McPurrs

K&N was not greasy at all. If it is after cleaning, too much oil was used. I can hear it spool with just the drop in.

Good to know!

05-27-2018, 07:36 AM	#1
Bt12 Captain 391 Rep 960 Posts Drives: 2018 X5,2018 m2, 2018 x1 Join Date: Sep 2017 Location: Bicoastal iTrader: (0)	Diverter valve noise? So maybe I wasn’t listening before but today it’s pouring hard in the tri-state area. So en route to the gym. I can hear the diverter valve dump air back into the intake. For those that don’t know what it sounds like... it sounds kind of like a blow off valve. But not as pronounced I have ASD turned off. I’m stock Doesn’t bother me but I definitely can hear it.
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05-29-2018, 09:38 AM	#2
McPurrs The deuce gets loose 290 Rep 499 Posts Drives: '17 M2 BSM 6MT Join Date: Mar 2017 Location: Worcester, MA iTrader: (0)	I swapped the air filter to a KN air filter and I can really hear it all of the time (radio off). I like it.
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05-30-2018, 09:51 AM	#5
AndrewC1989 Brigadier General 10931 Rep 4,551 Posts Drives: 2015 328d xDrive Join Date: Aug 2010 Location: NoVA iTrader: (5) Garage List 2015 328d xDrive [8.90]	It's amazing how much of the engine you can actually hear after you get rid of asd. With a dp/sport cat you can hear the turbo whistle when it's spooling up. So intoxicating.
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05-30-2018, 10:44 AM	#6
S2kM2dan Second Lieutenant 102 Rep 211 Posts Drives: 2018 LBB M2 6MT Join Date: Oct 2012 Location: Toronto iTrader: (0)	i want to hear the turbo spool so bad. I can barely hear it now. K&N seems tempting but I also read a lot about the oil filters causing issues with the MAF..
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