Fan sounds different after FMIC install

BigJack75 · 06-02-2019, 04:08 PM

I installed a VRSF charge pipe and 5" fmic. After the install when I took the car for a test drive it seemed ok but a few miles into the ride I got a drive train malfunction warning. So it looks like I didn't have the silicon coupler positioned correctly or clamped tight to to the 2 charge pipe halves. I re-adjusted everything and got it aligned correctly. Car runs great and I have no codes. I do have a different fan sound than before with the stock intercooler. I'm thinking the bigger fmic makes the fans sound different. Had anyone had this experience?

SilkySmoooth · 06-03-2019, 10:56 PM

I cant say I noticed this after my FMIC install. Did you secure the bottom of the fan to the intercooler tabs?

harkes · 06-03-2019, 11:32 PM

I experienced the same. Forgot about it quickly again though

Kraftwerk · 06-03-2019, 11:57 PM

Mine sounds a bit different too.

EDWYER · 06-04-2019, 08:17 AM

Normal.

wdeerfield · 06-04-2019, 09:38 AM

more air can move through the FMIC thus changing the sound of the fan

Troy27 · 07-15-2019, 02:08 PM

I just installed a fmic and my fan sounds different also. No codes everything is running fine. The fan is just louder now. I'm guessing it's normal because the intercooler is bigger and the fan is just echoing off of it. At least I hope that's what it is...

BigJack75 · 07-18-2019, 09:35 AM

Quote:

Originally Posted by Troy27

I just installed a fmic and my fan sounds different also. No codes everything is running fine. The fan is just louder now. I'm guessing it's normal because the intercooler is bigger and the fan is just echoing off of it. At least I hope that's what it is...

This is my hope too!!!

Polo08816 · 07-18-2019, 09:51 AM

When you install a larger intercooler (heat exchanger) in front of the radiator (another heat exchanger), you're altering the air flow through both heat exchangers. The fan make sound different because it's working harder due to air flow being more restrictive.

wdeerfield · 07-18-2019, 10:37 AM

my fan was loud as well but it turns out mine was shot and not running as it should. I just got the new replacement installed and its noticeably quieter than the old one. I also finally bent the wrong tabs on my VRSF FMIC to lock in the fan correctly.

XutvJet · 07-18-2019, 12:28 PM

Quote:

Originally Posted by Polo08816

When you install a larger intercooler (heat exchanger) in front of the radiator (another heat exchanger), you're altering the air flow through both heat exchangers. The fan make sound different because it's working harder due to air flow being more restrictive.

^This.

Polo08816 · 07-18-2019, 12:35 PM

Quote:

Originally Posted by Polo08816

When you install a larger intercooler (heat exchanger) in front of the radiator (another heat exchanger), you're altering the air flow through both heat exchangers. The fan make sound different because it's working harder due to air flow being more restrictive.

Quote:

Originally Posted by XutvJet

^This.

This may not be a problem for drag racing or roll racing, but it creates a cooling problem if you're tracking the car for sure because you need to balance the need of cooling the intake charge vs the engine coolant.

Troy27 · 07-18-2019, 01:51 PM

Mine definitely has a different tone but I wouldn't say I think anything is wrong with it. Hopefully...

06-02-2019, 04:08 PM	#1
BigJack75 Lieutenant 202 Rep 533 Posts Drives: M5 Dream Car Join Date: Aug 2018 Location: Right Here iTrader: (0)	Fan sounds different after FMIC install I installed a VRSF charge pipe and 5" fmic. After the install when I took the car for a test drive it seemed ok but a few miles into the ride I got a drive train malfunction warning. So it looks like I didn't have the silicon coupler positioned correctly or clamped tight to to the 2 charge pipe halves. I re-adjusted everything and got it aligned correctly. Car runs great and I have no codes. I do have a different fan sound than before with the stock intercooler. I'm thinking the bigger fmic makes the fans sound different. Had anyone had this experience? __________________ 435i GC
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06-03-2019, 10:56 PM	#2
SilkySmoooth Private First Class 30 Rep 106 Posts Drives: '13 335i MSPORT Estoril Blue Join Date: Nov 2018 Location: Charlotte, NC iTrader: (0)	I cant say I noticed this after my FMIC install. Did you secure the bottom of the fan to the intercooler tabs?
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06-03-2019, 11:32 PM	#3
harkes Colonel 1077 Rep 2,357 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	I experienced the same. Forgot about it quickly again though __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China)
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06-03-2019, 11:57 PM	#4
Kraftwerk Private First Class 30 Rep 101 Posts Drives: 2015 335i M Sport Join Date: Jun 2018 Location: Los Angeles iTrader: (0)	Mine sounds a bit different too. __________________ 2015 335i ///M-Sport 8AT \| M Performance Exhaust/Brakes/Suspension \| BMS CP \| BM3 Stage 2 \| VRSF FMIC \| AR Design DP \| AFE Filter \| RES Delete \| BavAuto Coils \| P3 Gauge \| xHP Stage 3 \|
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06-04-2019, 08:17 AM	#5
EDWYER Yoda of mods 1672 Rep 3,004 Posts Drives: X5 RWD Join Date: Feb 2018 Location: NC iTrader: (40) Garage List 2015 X5 RWD [0.00] 2016 BMW M2 [10.00]	Normal. __________________ Current: 2020 Explorer ST (Agate Black Metallic), F15 SGM RWD F87 AW (retired) F30 SBM 316rwhp/440rwtq (retired) Follow me on Twitter: https://twitter.com/EdwyerCLT YT: https://www.youtube.com/@DWYERGARAGE/videos
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06-04-2019, 09:38 AM	#6
wdeerfield A family of bimmers 2745 Rep 7,741 Posts Drives: '18 G01 X3M40i Join Date: Jan 2012 Location: Clifton Park, NY iTrader: (0)	more air can move through the FMIC thus changing the sound of the fan __________________ 2018 PB/Black G01 X3M40i \| 699M \| ZDA \| ZPP \| ZPX \| Maxton front lip \| X3M vents \| 15mm Spacers \| Diamond G20 style grills
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07-15-2019, 02:08 PM	#7
Troy27 Private First Class 43 Rep 165 Posts Drives: Bmw f30 Join Date: Apr 2019 Location: 33067 iTrader: (0)	I just installed a fmic and my fan sounds different also. No codes everything is running fine. The fan is just louder now. I'm guessing it's normal because the intercooler is bigger and the fan is just echoing off of it. At least I hope that's what it is...
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07-18-2019, 09:51 AM	#9
Polo08816 Brigadier General 1610 Rep 3,946 Posts Drives: 2014 335i M Sport Join Date: Sep 2010 Location: MD iTrader: (0)	When you install a larger intercooler (heat exchanger) in front of the radiator (another heat exchanger), you're altering the air flow through both heat exchangers. The fan make sound different because it's working harder due to air flow being more restrictive.
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07-18-2019, 10:37 AM	#10
wdeerfield A family of bimmers 2745 Rep 7,741 Posts Drives: '18 G01 X3M40i Join Date: Jan 2012 Location: Clifton Park, NY iTrader: (0)	my fan was loud as well but it turns out mine was shot and not running as it should. I just got the new replacement installed and its noticeably quieter than the old one. I also finally bent the wrong tabs on my VRSF FMIC to lock in the fan correctly. __________________ 2018 PB/Black G01 X3M40i \| 699M \| ZDA \| ZPP \| ZPX \| Maxton front lip \| X3M vents \| 15mm Spacers \| Diamond G20 style grills
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07-18-2019, 01:51 PM	#13
Troy27 Private First Class 43 Rep 165 Posts Drives: Bmw f30 Join Date: Apr 2019 Location: 33067 iTrader: (0)	Mine definitely has a different tone but I wouldn't say I think anything is wrong with it. Hopefully...
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