FMIC, Louder turbo spool!?

135i_Vert · 04-02-2017, 11:23 PM

So I just installed the vrsf 7" intercooler and charge pipe and changed out my spark plugs. And for some reason now when I start to build boost I can clearly and loudly hear my turbo spool. It's seriously quite loud and very noticeable. And not what they use to sound like.

To put it in perspective on a scale from 1-10 on loudness it was at about a 1 or 2 before, now after the install the sound is at about an 8!

I was just wondering if it was normal? It doesn't really make much sense to me how just a larger FMIC and charge pipe can make such a difference in sound? So if someone could explain and also make sure it's not a bad thing that would be greatly appreciated, and any feedback will help.

I have a 2011 n55 DTC with a dinan s2 tune and axel back exhaust... Along with the FMIC and charge pipe now.

Thanks a lot guys!

Stewy_604 · 04-03-2017, 09:58 AM

You will definitely hear more turbo noise following your FMIC and CP installs. I assume your not throwing any codes, and the car feels like its making full power? You may have a boost leak if the latter isn't true. Can you post a vid or sound clip?

Jeff@TopGearSolutions · 04-03-2017, 10:09 AM

Try tightening your connections, is it more like a whistle or high pitched squeal? If so then it's likely leaking boost.

135i_Vert · 04-03-2017, 01:06 PM

Quote:

Originally Posted by Stewy_604

You will definitely hear more turbo noise following your FMIC and CP installs. I assume your not throwing any codes, and the car feels like its making full power? You may have a boost leak if the latter isn't true. Can you post a vid or sound clip?

ok so apperently i dont know how to upload videos lol. however, here are the links to youtube i just uploaded... i hope this helps out! its kind of hard to here do to the drone of the exhaust but you can hear the "squeal" /"whistle" i was talking about

im also not throwing any CEL's and the power seems to be about the same but its hard for me to tell since it might just be all subconscious since i think there might be something wrong now...
Thank you for the help!

EDIT*** Ok so i do know how to post videos lol...

135i_Vert · 04-03-2017, 01:09 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Try tightening your connections, is it more like a whistle or high pitched squeal? If so then it's likely leaking boost.

More of like a whistle i presume... i uploaded some videos above, please check them out and tell me what you think it could be.
Thank you!

Jeff@TopGearSolutions · 04-03-2017, 01:11 PM

Quote:

Originally Posted by 135i_Vert

More of like a whistle i presume... i uploaded some videos above, please check them out and tell me what you think it could be.
Thank you!

100% Boost leak, tighten your clamps more and make sure your couplers are square with the pipe.

135i_Vert · 04-03-2017, 02:56 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

100% Boost leak, tighten your clamps more and make sure your couplers are square with the pipe.

Damn... i was afraid of that, i kept telling myself it was still pulling just as hard... but i cant lie to myself lol thank you for the input

ianc · 04-03-2017, 10:30 PM

Too bad, that's an awesome sound!

ianc

Jeff@TopGearSolutions · 04-04-2017, 08:52 AM

Quote:

Originally Posted by 135i_Vert

Damn... i was afraid of that, i kept telling myself it was still pulling just as hard... but i cant lie to myself lol thank you for the input

Eventually they would work themselves looser.

Stewy_604 · 04-04-2017, 10:39 AM

Quote:

Originally Posted by Jeff@TopGearSolutions

100% Boost leak, tighten your clamps more and make sure your couplers are square with the pipe.

Agreed! Boost leak IMO.

marco_135i · 04-07-2017, 12:11 AM

Quote:

Originally Posted by 135i_Vert

Damn... i was afraid of that, i kept telling myself it was still pulling just as hard... but i cant lie to myself lol thank you for the input

I ordered the same intercooler and just received it today. I was wondering if you resolved the whistling sound and if indeed was a boost leak? Did the car feel quicker? Did you have any issues installing? The box didn't come with instructions :/

houtan · 04-08-2017, 08:54 AM

Quote:

Originally Posted by marco_135i

I ordered the same intercooler and just received it today. I was wondering if you resolved the whistling sound and if indeed was a boost leak? Did the car feel quicker? Did you have any issues installing? The box didn't come with instructions :/

There are plenty of instruct online to help guide you and give you the general idea of how to install. I think cobb has instructions you can download and YouTube has some videos.

135i_Vert · 04-08-2017, 11:09 AM

Quote:

Originally Posted by marco_135i

I ordered the same intercooler and just received it today. I was wondering if you resolved the whistling sound and if indeed was a boost leak? Did the car feel quicker? Did you have any issues installing? The box didn't come with instructions :/

I'm almost 100 percent sure it's a boost leak... The shop I took it too won't be able to work on it till Sunday (tomorrow) I'm almost for certain it's something as small as not tightening something down enough. The shop I take it to does too good of work to mess something up seriously. As soon as they fix her up I'll let you know. And the car does not feel quick due to the leak but once it's fixed I'm sure it's gunna pull hard. And don't get discouraged the intercooler you got is bad ass and if installed correctly will make you very happy! This is just an uncommon mishap.

Stewy_604 · 04-10-2017, 06:59 PM

What was the outcome?

135i_Vert · 04-11-2017, 04:36 PM

Quote:

Originally Posted by Stewy_604

What was the outcome?

Found a leak and tightened down the bracket... Installed the P3 gauge and I peak at around 12psi, and I still here that same whistle sound at high rpm/turbo spool. Just not as bad. It may just be in my head I don't know. And since I didn't have the P3 gauge before the install I don't know what kind of boost I was making before... Is 12 pounds normal for dinan s2?

Also the gauge is through the obdII port and not from the vacume line.

playground · 04-16-2017, 09:10 PM

Boost leak.

mike@x-ph.com · 04-20-2017, 01:56 PM

Quote:

Originally Posted by 135i_Vert

Found a leak and tightened down the bracket... Installed the P3 gauge and I peak at around 12psi, and I still here that same whistle sound at high rpm/turbo spool. Just not as bad. It may just be in my head I don't know. And since I didn't have the P3 gauge before the install I don't know what kind of boost I was making before... Is 12 pounds normal for dinan s2?

Also the gauge is through the obdII port and not from the vacume line.

Contact Dinan and ask about their target boost for the map you are using

Rob_BMW_PNW · 04-20-2017, 05:13 PM

If it sounds like a whale when you are spooling you have a leak.

04-02-2017, 11:23 PM	#1
135i_Vert Private 20 Rep 76 Posts Drives: 2011 135i convertible Join Date: Nov 2016 Location: texas iTrader: (0)	FMIC, Louder turbo spool!? So I just installed the vrsf 7" intercooler and charge pipe and changed out my spark plugs. And for some reason now when I start to build boost I can clearly and loudly hear my turbo spool. It's seriously quite loud and very noticeable. And not what they use to sound like. To put it in perspective on a scale from 1-10 on loudness it was at about a 1 or 2 before, now after the install the sound is at about an 8! I was just wondering if it was normal? It doesn't really make much sense to me how just a larger FMIC and charge pipe can make such a difference in sound? So if someone could explain and also make sure it's not a bad thing that would be greatly appreciated, and any feedback will help. I have a 2011 n55 DTC with a dinan s2 tune and axel back exhaust... Along with the FMIC and charge pipe now. Thanks a lot guys!
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04-03-2017, 09:58 AM	#2
Stewy_604 First Lieutenant 77 Rep 310 Posts Drives: 2011 E82 135i M-Sport Join Date: Aug 2015 Location: Vancouver, B.C. iTrader: (0)	You will definitely hear more turbo noise following your FMIC and CP installs. I assume your not throwing any codes, and the car feels like its making full power? You may have a boost leak if the latter isn't true. Can you post a vid or sound clip? __________________ 2011 BMW 135i M Sport Space Grey - BMS JB4, VRSF 3.5" catless DP, Berk exhaust, BMS intake, ER CP, Eibach Pro-Kit, H&R spacers, black kidneys, Blacklines, LUX angel eyes 2014 BMW X5 xDrive 35d M Sport Mineral White - MPBK w/ F85 rotors & Carbotech pads, ACS Springs/Links, iND reflector deletes, iND black roundels, MP black kidneys, M50D grille inserts 2007 Suzuki GSX-R 750 - too much to list
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04-03-2017, 10:09 AM	#3
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Try tightening your connections, is it more like a whistle or high pitched squeal? If so then it's likely leaking boost.
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04-03-2017, 10:30 PM	#8
ianc Ex '87 Carrera 246 Rep 1,259 Posts Drives: '10 TiAg 6MT 135i Join Date: Feb 2010 Location: Redwood Shores, California iTrader: (0)	Too bad, that's an awesome sound! ianc
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04-10-2017, 06:59 PM	#14
Stewy_604 First Lieutenant 77 Rep 310 Posts Drives: 2011 E82 135i M-Sport Join Date: Aug 2015 Location: Vancouver, B.C. iTrader: (0)	What was the outcome? __________________ 2011 BMW 135i M Sport Space Grey - BMS JB4, VRSF 3.5" catless DP, Berk exhaust, BMS intake, ER CP, Eibach Pro-Kit, H&R spacers, black kidneys, Blacklines, LUX angel eyes 2014 BMW X5 xDrive 35d M Sport Mineral White - MPBK w/ F85 rotors & Carbotech pads, ACS Springs/Links, iND reflector deletes, iND black roundels, MP black kidneys, M50D grille inserts 2007 Suzuki GSX-R 750 - too much to list
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04-16-2017, 09:10 PM	#16
playground Lieutenant 32 Rep 473 Posts Drives: M3 Join Date: Jan 2013 Location: North York iTrader: (0)	Boost leak. __________________ Become like water my friend.
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04-20-2017, 05:13 PM	#18
Rob_BMW_PNW Captain 127 Rep 609 Posts Drives: 135i 2011 Join Date: Jan 2016 Location: PNW iTrader: (3)	If it sounds like a whale when you are spooling you have a leak. __________________ 2011 135i N55 Pure Stage 2 Turbo, Stage 2 LPFP, N54tuning.com Catless DP, Cobb Drop in, AEM Meth Kit, MHD, BMS OCC, Tuned by WedgePerformance PI, LSD, and Dif lockdown coming soon
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