Help Wanted: VRSF Chargepipe

beentrev · 09-03-2019, 12:09 AM

Recently had a VRSF chargepipe installed on my 435i and am now hearing an abnormal whistling sound when my car's at WOT. No accompanying CEL and had the car checked for leaks.

Having trouble diagnosing the cause (and honestly not the biggest gearhead), but would appreciate any help from a fellow forum member who may be familiar.

Only other mods are HEX Tuning Stage 1 Flash and MPE. Located in San Francisco. Let me know — lunch on me.

illest_F30 · 09-04-2019, 01:37 AM

Quote:

Originally Posted by beentrev

Recently had a VRSF chargepipe installed on my 435i and am now hearing an abnormal whistling sound when my car's at WOT. No accompanying CEL and had the car checked for leaks.

Having trouble diagnosing the cause (and honestly not the biggest gearhead), but would appreciate any help from a fellow forum member who may be familiar.

Only other mods are HEX Tuning Stage 1 Flash and MPE. Located in San Francisco. Let me know — lunch on me.

If there no lost in power then it's normal.

beentrev · 09-04-2019, 10:13 AM

Quote:

Originally Posted by illest_F30

Quote:

Originally Posted by beentrev

Recently had a VRSF chargepipe installed on my 435i and am now hearing an abnormal whistling sound when my car's at WOT. No accompanying CEL and had the car checked for leaks.

Having trouble diagnosing the cause (and honestly not the biggest gearhead), but would appreciate any help from a fellow forum member who may be familiar.

Only other mods are HEX Tuning Stage 1 Flash and MPE. Located in San Francisco. Let me know — lunch on me.

If there no lost in power then it's normal.

Definitely no major loss of power, but can't tell if it's something minor. It's also mainly the annoyance of the sound 😅

Slinger24 · 09-04-2019, 11:37 AM

If it sounds like a big "woooshh" under WOT, I would go back in and make sure the Chargepipe is properly connected to the IC. It has to be seated flush so you might have to wiggle it and push it firmly.

If its in there properly, you might have installed the rubber seal backwards.

jh_f30 · 09-04-2019, 11:57 PM

Tighten down the meth bung plug. It's a hex/allen but I don't recall what size.

I'll do it for free lunch!

beentrev · 09-05-2019, 12:07 AM

Thanks for the tips -- I'll take a look at those items. Don't believe it's the meth bung plugs, as I specifically called that out to the installation shop, and they mentioned they tightened and sealed them. (The shop I used isn't conveniently located to me, otherwise I'd revisit them.)

Here's a quick clip in case it provides further insight. Hard to hear, but the sound comes on mid-way.

AK415 · 09-05-2019, 02:35 PM

Like the guys mentioned earlier, o-rings (TB to CP, TMAP sensor, and CP to FMIC), meth bang, rubber sleeve, and sitting position.

It wasn't easy sliding it on TB and FMIC to be honest, but lubricant was the key!

exE36M3 · 09-05-2019, 11:54 PM

FWIW... I seem to remember the inside of the VSRF charge pipe as NOT being the most well finished tubing.. and I could swear I remember a couple sharp edges which I sanded down. I've got the same CP.

If you don't have any vaccuum leaks, I'd guess that you might have a sharp edge in the pipe that, with a significant movement of air over it... whistles.

beentrev · 12-29-2019, 10:51 PM

Bump, if anyone has the chance to take a look/help. Double checked and nothing visibly stands out, but not too familiar with the car beyond standard maintenance. Would definitely appreciate any guidance — lunch on me.

Happy holidays.

beentrev · 03-05-2020, 02:02 PM

Figured this out and posting in case others have a similar issue in the future and can troubleshoot. It's actually the "MPE whistle" -- if you run a forum search, a lot of results should appear.

Thanks, all.

09-03-2019, 12:09 AM	#1
beentrev Private 17 Rep 66 Posts Drives: BMW 435i Join Date: Apr 2019 Location: San Francisco iTrader: (2)	Help Wanted: VRSF Chargepipe Recently had a VRSF chargepipe installed on my 435i and am now hearing an abnormal whistling sound when my car's at WOT. No accompanying CEL and had the car checked for leaks. Having trouble diagnosing the cause (and honestly not the biggest gearhead), but would appreciate any help from a fellow forum member who may be familiar. Only other mods are HEX Tuning Stage 1 Flash and MPE. Located in San Francisco. Let me know — lunch on me.
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09-04-2019, 11:37 AM	#4
Slinger24 Private 18 Rep 85 Posts Drives: F3x 335i M Sport Join Date: Oct 2018 Location: San Diego iTrader: (0)	If it sounds like a big "woooshh" under WOT, I would go back in and make sure the Chargepipe is properly connected to the IC. It has to be seated flush so you might have to wiggle it and push it firmly. If its in there properly, you might have installed the rubber seal backwards.
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09-04-2019, 11:57 PM	#5
jh_f30 Lieutenant Colonel 1306 Rep 1,827 Posts Drives: 2013 335i Sportline Auto RWD Join Date: Aug 2017 Location: Bay Area, CA iTrader: (2)	Tighten down the meth bung plug. It's a hex/allen but I don't recall what size. I'll do it for free lunch! __________________ 2013 F30 335i RWD ZF Melbourne Red ~Remus Sport Axleback~VRSF Chargepipe~VRSF Catless Downpipe~GPlus FMIC~HR Sport Springs~Active Autowerke OBD Flash Tune Stage 2~
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09-05-2019, 12:07 AM	#6
beentrev Private 17 Rep 66 Posts Drives: BMW 435i Join Date: Apr 2019 Location: San Francisco iTrader: (2)	Thanks for the tips -- I'll take a look at those items. Don't believe it's the meth bung plugs, as I specifically called that out to the installation shop, and they mentioned they tightened and sealed them. (The shop I used isn't conveniently located to me, otherwise I'd revisit them.) Here's a quick clip in case it provides further insight. Hard to hear, but the sound comes on mid-way.
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09-05-2019, 02:35 PM	#7
AK415 Lieutenant 197 Rep 417 Posts Drives: 2015 F32 435i Join Date: Oct 2018 Location: DFW iTrader: (1)	Like the guys mentioned earlier, o-rings (TB to CP, TMAP sensor, and CP to FMIC), meth bang, rubber sleeve, and sitting position. It wasn't easy sliding it on TB and FMIC to be honest, but lubricant was the key!
	Appreciate 0 Quote

09-05-2019, 11:54 PM	#8
exE36M3 BMW CCA Member 488 Rep 808 Posts Drives: 2015 435i M Sport Join Date: Jan 2018 Location: NorCal iTrader: (4)	FWIW... I seem to remember the inside of the VSRF charge pipe as NOT being the most well finished tubing.. and I could swear I remember a couple sharp edges which I sanded down. I've got the same CP. If you don't have any vaccuum leaks, I'd guess that you might have a sharp edge in the pipe that, with a significant movement of air over it... whistles.
	Appreciate 0 Quote

12-29-2019, 10:51 PM	#9
beentrev Private 17 Rep 66 Posts Drives: BMW 435i Join Date: Apr 2019 Location: San Francisco iTrader: (2)	Bump, if anyone has the chance to take a look/help. Double checked and nothing visibly stands out, but not too familiar with the car beyond standard maintenance. Would definitely appreciate any guidance — lunch on me. Happy holidays.
	Appreciate 0 Quote

03-05-2020, 02:02 PM	#10
beentrev Private 17 Rep 66 Posts Drives: BMW 435i Join Date: Apr 2019 Location: San Francisco iTrader: (2)	Figured this out and posting in case others have a similar issue in the future and can troubleshoot. It's actually the "MPE whistle" -- if you run a forum search, a lot of results should appear. Thanks, all.
	Appreciate 0 Quote