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      07-18-2019, 09:53 PM   #1
ottawa_f30
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Screaming sound coming from my car!

Hey guys, I currently own a 2013 328ix. It has 3 main modifications to the car
1.Catless dp
2.K and n filter
3.Bootmod stage 2

I put the dp on a few months ago with no problems at all. About 3 months ago this whining sound (can be heard over 3,000 rpm) has been driving me crazy. I took it to my mechanic where they said nothing was wrong. I took it to Bmw 2 weeks ago where they said the sound is coming from the dp and that nothing was wrong. I am losing no boost, no engine lights, no loss of power.

I don't think is is a normal occurrence on cars with a catless dp. The screening is worse when I code boot mod onto the car. When I drive at slower speed I can here the turbos spooling a lot louder, but when I gas it it just screams (like a little girl)

From what I have been hearing it should be the turbos, but I have a feeling it may be something else.

I will add vids below

If anyone has any idea what it could be please let me know! I am going crazy with this sound
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      07-18-2019, 10:02 PM   #2
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      07-18-2019, 10:29 PM   #3
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You really shouldn't be running stage 2 without an upgraded FMIC and CP.

I wonder if you do indeed have a boost leak. They can be whiny / whistly.

Also... the drop in filter is definitely increasing turbo sound. Could be just that, by itself.

Have you scanned for codes?
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      07-18-2019, 10:56 PM   #4
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Quote:
Originally Posted by sspade View Post
You really shouldn't be running stage 2 without an upgraded FMIC and CP.

I wonder if you do indeed have a boost leak. They can be whiny / whistly.

Also... the drop in filter is definitely increasing turbo sound. Could be just that, by itself.

Have you scanned for codes?
I haven't run stage 2 for more than a few days at a time(during the winter). I had the problem before the tune so I want to make sure the car is stable before buying the intercooler and running stage 2 daily.

I changed the drop-in filter to stock to see if that was what's causing the problem. Nothing changed sound wise

Regarding a boost leak, there is no loss of power nor a slow spool from what I can feel. I have also used the boot mod tool for testing (no loss of boost from what I can see)

The check engine light is on due to the oxygen sensors. No other codes have appeared since
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      07-18-2019, 11:08 PM   #5
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Hmmm. I hear what you're saying. There's only so many possibilities and it definitely sounds like its coming from engine air intake / turbo induction systems...

I wonder if you're stock diverter valve has taken a dump. They are largely made of plastic and known to fail under stock boost over time, let alone increased boost pressures.

The GFB DV+ would be a nice upgrade and reasonably priced at under $150 shipped. Might be worth a try.

Interested to hear if anyone else has any ideas.
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      07-19-2019, 01:20 AM   #6
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Quote:
Originally Posted by ottawa_f30 View Post
Hey guys, I currently own a 2013 328ix. It has 3 main modifications to the car
1.Catless dp
2.K and n filter
3.Bootmod stage 2

I put the dp on a few months ago with no problems at all. About 3 months ago this whining sound (can be heard over 3,000 rpm) has been driving me crazy. I took it to my mechanic where they said nothing was wrong. I took it to Bmw 2 weeks ago where they said the sound is coming from the dp and that nothing was wrong. I am losing no boost, no engine lights, no loss of power.

I don't think is is a normal occurrence on cars with a catless dp. The screening is worse when I code boot mod onto the car. When I drive at slower speed I can here the turbos spooling a lot louder, but when I gas it it just screams (like a little girl)

From what I have been hearing it should be the turbos, but I have a feeling it may be something else.

I will add vids below

If anyone has any idea what it could be please let me know! I am going crazy with this sound
Sounds like ur stock DV took a dump, Time to replace that shit. doesn't sound like a boost leak to me.
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      07-19-2019, 06:30 AM   #7
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Interesting sound... doesn't sound like a normal boost leak IMO. Could be the diverter valve as others have said.
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      07-19-2019, 08:11 AM   #8
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Like others have said, sounds like diverter valve and you should be on stage 1 not 2. Also FYi, you only have one turbo.
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      07-19-2019, 11:13 AM   #9
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Originally Posted by CandyRedRC46 View Post
Like others have said, sounds like diverter valve and you should be on stage 1 not 2. Also FYi, you only have one turbo.
Alright, I will check that out and see if that's the problem. I am not using stage 2 daily. The fmic will be ordered before stage 2 will be used. Also, The engine is an n20 (twin-scroll)
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      07-19-2019, 11:19 AM   #10
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Quote:
Originally Posted by rjdnyy224 View Post
Interesting sound... doesn't sound like a normal boost leak IMO. Could be the diverter valve as others have said.
Thank you! I will order a new one asap. Let's hope that is what the problem is. I am surprised after paying BMW $500 to look at the car they couldn't even diagnose it.
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      07-19-2019, 11:33 AM   #11
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Quote:
Originally Posted by sspade View Post
Hmmm. I hear what you're saying. There's only so many possibilities and it definitely sounds like its coming from engine air intake / turbo induction systems...

I wonder if you're stock diverter valve has taken a dump. They are largely made of plastic and known to fail under stock boost over time, let alone increased boost pressures.

The GFB DV+ would be a nice upgrade and reasonably priced at under $150 shipped. Might be worth a try.

Interested to hear if anyone else has any ideas.
Done just got the exact one you recommended. I will keep the thread updated
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      07-19-2019, 11:37 AM   #12
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Quote:
Originally Posted by ottawa_f30 View Post
Quote:
Originally Posted by sspade View Post
Hmmm. I hear what you're saying. There's only so many possibilities and it definitely sounds like its coming from engine air intake / turbo induction systems...

I wonder if you're stock diverter valve has taken a dump. They are largely made of plastic and known to fail under stock boost over time, let alone increased boost pressures.

The GFB DV+ would be a nice upgrade and reasonably priced at under $150 shipped. Might be worth a try.

Interested to hear if anyone else has any ideas.
Done just got the exact one you recommended. I will keep the thread updated
Just a word to the wise... there are a lot of knockoff DV+ floating around.

Just trying to save you the trouble of dealing with it.

I hope you purchased from a reputable dealer. This is one part that you dont want to buy at discount. That likely means its fake. For example... you can find them for around $70 on eBay.

YouTube it and youll see what I mean. Also this forum outlines the issues people have had.

Can be harmful to turbo and will cause you to take the car apart twice.
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      07-19-2019, 11:38 AM   #13
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      07-19-2019, 12:58 PM   #14
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Quote:
Originally Posted by sspade View Post
Quote:
Originally Posted by ottawa_f30 View Post
Quote:
Originally Posted by sspade View Post
Hmmm. I hear what you're saying. There's only so many possibilities and it definitely sounds like its coming from engine air intake / turbo induction systems...

I wonder if you're stock diverter valve has taken a dump. They are largely made of plastic and known to fail under stock boost over time, let alone increased boost pressures.

The GFB DV+ would be a nice upgrade and reasonably priced at under $150 shipped. Might be worth a try.

Interested to hear if anyone else has any ideas.
Done just got the exact one you recommended. I will keep the thread updated
Just a word to the wise... there are a lot of knockoff DV+ floating around.

Just trying to save you the trouble of dealing with it.

I hope you purchased from a reputable dealer. This is one part that you dont want to buy at discount. That likely means its fake. For example... you can find them for around $70 on eBay.

YouTube it and youll see what I mean. Also this forum outlines the issues people have had.

Can be harmful to turbo and will cause you to take the car apart twice.
Bought mine straight from KieMotorsports. I'm pretty sure his company is very well known here, so I suggest OP buys from him.
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      07-19-2019, 01:04 PM   #15
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Quote:
Originally Posted by Craeftig View Post
Quote:
Originally Posted by sspade View Post
Quote:
Originally Posted by ottawa_f30 View Post
Quote:
Originally Posted by sspade View Post
Hmmm. I hear what you're saying. There's only so many possibilities and it definitely sounds like its coming from engine air intake / turbo induction systems...

I wonder if you're stock diverter valve has taken a dump. They are largely made of plastic and known to fail under stock boost over time, let alone increased boost pressures.

The GFB DV+ would be a nice upgrade and reasonably priced at under $150 shipped. Might be worth a try.

Interested to hear if anyone else has any ideas.
Done just got the exact one you recommended. I will keep the thread updated
Just a word to the wise... there are a lot of knockoff DV+ floating around.

Just trying to save you the trouble of dealing with it.

I hope you purchased from a reputable dealer. This is one part that you dont want to buy at discount. That likely means its fake. For example... you can find them for around $70 on eBay.

YouTube it and youll see what I mean. Also this forum outlines the issues people have had.

Can be harmful to turbo and will cause you to take the car apart twice.
Bought mine straight from KieMotorsports. I'm pretty sure his company is very well known here, so I suggest OP buys from him.
You are correct. I got mine from Extreme Power House who is also a forum sponsor.
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      07-19-2019, 03:31 PM   #16
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Quote:
Originally Posted by sspade View Post
Quote:
Originally Posted by Craeftig View Post
Quote:
Originally Posted by sspade View Post
Quote:
Originally Posted by ottawa_f30 View Post
Quote:
Originally Posted by sspade View Post
Hmmm. I hear what you're saying. There's only so many possibilities and it definitely sounds like its coming from engine air intake / turbo induction systems...

I wonder if you're stock diverter valve has taken a dump. They are largely made of plastic and known to fail under stock boost over time, let alone increased boost pressures.

The GFB DV+ would be a nice upgrade and reasonably priced at under $150 shipped. Might be worth a try.

Interested to hear if anyone else has any ideas.
Done just got the exact one you recommended. I will keep the thread updated
Just a word to the wise... there are a lot of knockoff DV+ floating around.

Just trying to save you the trouble of dealing with it.

I hope you purchased from a reputable dealer. This is one part that you dont want to buy at discount. That likely means its fake. For example... you can find them for around $70 on eBay.

YouTube it and youll see what I mean. Also this forum outlines the issues people have had.

Can be harmful to turbo and will cause you to take the car apart twice.
Bought mine straight from KieMotorsports. I'm pretty sure his company is very well known here, so I suggest OP buys from him.
You are correct. I got mine from Extreme Power House who is also a forum sponsor.
Yeah I bought my BM3 license & ER DP from extreme power. So I agree also.
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      07-22-2019, 08:44 AM   #17
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Quote:
Originally Posted by ottawa_f30 View Post
Alright, I will check that out and see if that's the problem. I am not using stage 2 daily. The fmic will be ordered before stage 2 will be used. Also, The engine is an n20 (twin-scroll)
Yes, correct. It has a single turbo, that has twin scrolls.
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