High pressure air leak sound under wot...

jfischetti · 04-08-2010, 09:28 PM

I think I have an air leak somewhere in the system. I am new to turbos, so blow off valves and air dirverters are foreing to me...please advise me where to look for an air leak... Noise began after installing jb3...could something have blown off?
Thanks
J

ala012 · 04-08-2010, 09:33 PM

It's normal.

cn555ic · 04-08-2010, 09:38 PM

Your running more boost than stock, so during WOT when you press the throttle and release it, you will definitely hear these new strange pssshh noises,

jfischetti · 04-08-2010, 09:38 PM

Really, feels like pressure release/power loss. I am saying power loss because the jb3 in map 4 just doesnt seem like like much more power...
Thanks

jfischetti · 04-08-2010, 09:40 PM

I also dont hear it under throttle release, its when pushing it at WOT...
Thanks again...

coolingmist · 04-08-2010, 10:25 PM

Quote:

Originally Posted by jfischetti

I also dont hear it under throttle release, its when pushing it at WOT...
Thanks again...

make sure your stock air box is fully secured. if you have any gaps it will sound exactly like you describe.

CM

TurboSid · 04-08-2010, 10:28 PM

sounds like your turbos spooling... do u have an aftermarke intake?

Sniz · 04-08-2010, 10:34 PM

take it to a dyno

Mike@N54Tuning.com · 04-08-2010, 10:34 PM

Could be a boost leak or may be normal. Do a JB3 datalog and send it in to BMS for advice. From the log they can tell you if there is a problem.

Mike

04-08-2010, 09:28 PM	#1
jfischetti Private First Class 5 Rep 136 Posts Drives: 07 335i Join Date: Aug 2009 Location: NY iTrader: (3)	High pressure air leak sound under wot... I think I have an air leak somewhere in the system. I am new to turbos, so blow off valves and air dirverters are foreing to me...please advise me where to look for an air leak... Noise began after installing jb3...could something have blown off? Thanks J
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04-08-2010, 09:33 PM	#2
ala012 Koala012 20 Rep 637 Posts Drives: E92 M3 Dakar Yellow Join Date: May 2008 Location: NJ, Seoul S.Korea iTrader: (12) Garage List 2007 BMW 335i [0.00]	It's normal. __________________ E92 M3 Dakar Yellow DCT \| CF Trim Akrapovic EVO Exhaust \| RECARO RS-F SK2 Seat \| KW Clubsports \| H&R Sway Bar \| DCT Cooler \| iTG Air Filter \| Volk TE37 SL + RS3 Tire
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04-08-2010, 09:38 PM	#3
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Your running more boost than stock, so during WOT when you press the throttle and release it, you will definitely hear these new strange pssshh noises,
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04-08-2010, 09:38 PM	#4
jfischetti Private First Class 5 Rep 136 Posts Drives: 07 335i Join Date: Aug 2009 Location: NY iTrader: (3)	Really, feels like pressure release/power loss. I am saying power loss because the jb3 in map 4 just doesnt seem like like much more power... Thanks
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04-08-2010, 09:40 PM	#5
jfischetti Private First Class 5 Rep 136 Posts Drives: 07 335i Join Date: Aug 2009 Location: NY iTrader: (3)	I also dont hear it under throttle release, its when pushing it at WOT... Thanks again...
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04-08-2010, 10:28 PM	#7
TurboSid Brigadier General 1112 Rep 3,261 Posts Drives: 2022 M4Cx BSM/FR Join Date: Apr 2008 Location: Florida iTrader: (4) Garage List 2008 335i [0.00]	sounds like your turbos spooling... do u have an aftermarke intake? __________________ 2022 BSM/FR M4 Competition X-Drive 2017 MW/SO M4 ZCP [SOLD] • 2015 MW/SO M4 M-DCT FBO [SOLD] • 2011 AW/CR 335is DCT FBO [SOLD] • 2008 AW/CR 335i 6MT FBO [SOLD]
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04-08-2010, 10:34 PM	#8
Sniz Lieutenant General 658 Rep 10,587 Posts Drives: e92 335 - gone // e36 M3 turbo Join Date: Mar 2007 Location: Ellicott City, MD iTrader: (1)	take it to a dyno __________________
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04-08-2010, 10:34 PM	#9
Mike@N54Tuning.com Joint Chiefs of Staff 4920 Rep 115,999 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	Could be a boost leak or may be normal. Do a JB3 datalog and send it in to BMS for advice. From the log they can tell you if there is a problem. Mike
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