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02-20-2013, 10:58 PM | #1 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
intake/turbo flutter!
Need some help, 04 wrx with really bad flutter when i let of the gas in any gear or throttle! this is what it sounds like im running a front mount with a bov and 16g turbo
Ive tried different blow off valves and adjusting them and it still flutters. could i have a bad vacuum for the bov?
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02-21-2013, 01:43 AM | #2 |
Scooby Newbie
Member#: 345936
Join Date: Feb 2013
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Mine did the same thing could be tgv's goin bad?
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03-15-2013, 06:41 PM | #3 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
Fixed it, installed the stock bpv and flutter went away
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03-15-2013, 06:46 PM | #4 |
Scooby Specialist
Member#: 206802
Join Date: Mar 2009
Chapter/Region:
South East
Location: Atlanta
Vehicle:1998 2.5rs Black |
yea that's what we call a compression surge in the turbo world
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03-15-2013, 06:48 PM | #5 |
Scooby Guru
Member#: 166324
Join Date: Dec 2007
Chapter/Region:
NESIC
Location: BLOD in BLOD out
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#1, you RHD?
#2, you have a built motor? #3, if no to #2 do you have a ticking sound from your motor? |
03-19-2013, 11:32 AM | #6 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
Yea i do have a ticking sound
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03-19-2013, 04:50 PM | #7 |
Scooby Specialist
Member#: 279525
Join Date: Apr 2011
Chapter/Region:
Tri-State
Location: QUEENS NY
Vehicle:06 Fxt |
What kinda oil u running?
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03-19-2013, 08:27 PM | #8 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
Was running castrol gtx 5w30 but literally switch to rotella t6 5w40 an hour ago
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03-19-2013, 10:04 PM | #9 |
Scooby Specialist
Member#: 279525
Join Date: Apr 2011
Chapter/Region:
Tri-State
Location: QUEENS NY
Vehicle:06 Fxt |
Yes! MAybe thicker oil might cease the ticking.
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03-20-2013, 07:21 AM | #10 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
Oh the video isn't my car, the valve ticking is bad in that video.
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03-20-2013, 07:32 AM | #11 |
Scooby Newbie
Member#: 346017
Join Date: Feb 2013
Location: Southeast WI
Vehicle:2013 STi Wagon Satin White Pearl |
Good you got it fixed, its really not good for the turbo. It should have been obvious this was the BOV not opening, you could have just adjusted it correctly or like you did probably for the better put the stock one back on.
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03-20-2013, 10:07 AM | #12 | |
Scooby Specialist
Member#: 234783
Join Date: Jan 2010
Chapter/Region:
Tri-State
Location: Pennsylvania
Vehicle:2004 STi Aspen White |
Quote:
as for the BOV, it needs to be correctly adjusted to do away with with the surge, running the Stock BPV is fine, but if you want your blowoff back, you just need to adjust it so it acctually blows off correctly. |
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03-20-2013, 01:56 PM | #13 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
The surging killed my 20g after only 3000 miles it
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03-20-2013, 01:59 PM | #14 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
I tryed adjusting the BOV many times with different springs, even if I had it set really soft it would still surge or open at idle. I might have just bought a ****ty blow off valve plus I think it hAs something to do with running a front mount all that extra space and the way the air is running through.
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03-20-2013, 02:02 PM | #15 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
If you still want the BOV sound, you can just eliminate the return hose from the bpv and plug the inlet hole. I don't see anything wrong with doing that, no flutter and still have the sound
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03-20-2013, 05:41 PM | #16 |
Scooby Specialist
Member#: 279449
Join Date: Apr 2011
Chapter/Region:
MWSOC
Location: Omaha, NE
Vehicle:2004 8.78 E/T WRX Platinum Silver |
As much as I love the surge sound... yea it's best to run that bpv instead lol.
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03-20-2013, 09:23 PM | #17 |
Scooby Specialist
Member#: 263694
Join Date: Nov 2010
Location: hollidaysburg, pa (central Pa)
Vehicle:2002 WRX World Rally Blue |
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03-20-2013, 10:37 PM | #18 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
Yea, but first time it died was because bov was seized and didn't open and I had just got the car not know much About it
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03-20-2013, 10:39 PM | #19 |
Scooby Newbie
Member#: 329931
Join Date: Aug 2012
Location: Rochester ny
Vehicle:2004 wrx Blue |
Isn't it compressor stall? As you let throttle off all the air rushes straight back to the turbo
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04-05-2013, 07:14 AM | #20 |
Scooby Specialist
Member#: 234783
Join Date: Jan 2010
Chapter/Region:
Tri-State
Location: Pennsylvania
Vehicle:2004 STi Aspen White |
No, compressor stall refers to Turbine Engines. compressor surge is the politically correct term. Basically, the mechanics are, when the throttle plate closes, the turbo is still spinning and generating pressure, being that the air has nowhere to escape, it flows back onto the compressor wheel. this causes the compressor wheel to essentially lose grip on the air its trying to throw in, and some of the air escapes past the compressor. In that instant, the pressure in the intercooler piping drops momentarily, and the compressor gets a hold of the air, throws it back in, and the process repeats. which is why its a repeated "chuffing" sound. Hopefully this dispells some myths. the sound of compressor surge is simply, the sound of the air on the fins. in a strange process of escaping the pressurized area. The turbo, Does not spin backwards, nor does it stop momentarily. hope this helped!
And as for the godspeed turbo, you spent 300$ on a turbo, and thought it would last? Cost, Reliability, performance. <pick two. you cannot have all three. |
04-05-2013, 07:25 AM | #21 |
Scooby Specialist
Member#: 234783
Join Date: Jan 2010
Chapter/Region:
Tri-State
Location: Pennsylvania
Vehicle:2004 STi Aspen White |
Did you know, at one point, turboed vehicles didnt use any sort of blow off, or bypass valve? and compressor surge was how it came from the factory?
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