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BMW 3-Series (E90 E92) Forum
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Turbo Siren
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| 10-19-2014, 08:21 PM | #1 |
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Turbo Siren
I have a FBO PTF tuned Z4 35i DCT and I have been experiencing the turbo siren. It happens most often when cold and between 2300 and 2700 rpm. I am on stock turbos and the noise doesn't seem to affect my boost or performance in any way. Is there any thing that I should do.
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| 10-19-2014, 08:35 PM | #2 |
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Common result from having a tuned car. I wouldn't worry about it unless it gets much worse.
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| 10-20-2014, 10:26 AM | #3 |
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I'm in the same boat. Been making noise ever since I installed my cat-back exhaust in August. Does not seem to be affecting performance at all, but still annoying.
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| 10-20-2014, 04:03 PM | #4 |
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First Lieutenant
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check to see if the turbo inlets are aligned properly, when installing an intake they can get knocked around and slide off the turbo. particularly the rear turbo
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| 10-20-2014, 04:06 PM | #5 | ||
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Quote:
Quote:
A slight siren is normal, especially when it gets colder out. If your blowing smoke out the exhaust and or having boost issues then it would be somewhat of a concern. My turbo's were making the sire noise since I bought the car new. |
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| 10-20-2014, 04:24 PM | #6 |
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Siren is normal (depending on how loud it gets)
If you post a video we can definitely help or you can compare it to another local car that is tuned too
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| 10-28-2014, 05:59 PM | #8 |
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Okay here is a video of what I am hearing.
I tried to get the microphone close to the turbos on the passenger side but the turbos are making this noise around 2500rpm. Turn up the volume. |
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| 10-28-2014, 08:13 PM | #10 |
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my damn car is louder than a turbo diesel f350 when its cold and i am driving. Think its normal as the car runs perfect.
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| 10-29-2014, 10:12 AM | #11 | |
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Quote:
This is exactly what mine sounds like. Starts at around 1800 RPM to about 2800 RPM... Its annoying and I heard it right after I installed my exhaust. I am going to double check my inlets as I had to bang the X pipe on when installing the Borla. Jeff, is this how yours sounds?
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2009 335i M Sport coupe, BSM with black/aluminum interior, 6MT, JB4 G5, MDH Backend Flash, Walbro 255 inline LPFP, VRSF Inlets, BMS 3" catless DP's, Borla Aggressive catback, ER FMIC, ER charge pipe, Tial BOV, BMS 2.3 gal Meth Kit, BMS Sport Oil Cooler Valve, Ported CDV, RB PCV, Cyba ram air scoops, Status Gruppe SRS coilovers, ECS trailing arms, Forgestar F14 SDC.
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