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Old 10-30-2012, 06:20 PM   #1
veel86
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Default waste gate flutter

whats a good way to get rid of waste gate flutter on my VF39?
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Old 10-30-2012, 06:21 PM   #2
nate_fisher
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Ewg or a stiffer iwg like the forge unit will get rid of it. A 3 port ebcs may help with it as well.
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Old 10-30-2012, 06:46 PM   #3
the suicidal eggroll
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You can't get rid of it. The sound you hear is the wastegate working. To get rid of the sound would cause the wastegate to stop working...

An MBC is the only real way since the WG stays partially open all the time when you're at target boost instead of pulsing, but there are plenty of drawbacks to an MBC as well.
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Old 10-30-2012, 06:47 PM   #4
the suicidal eggroll
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Quote:
Originally Posted by nate_fisher View Post
Ewg or a stiffer iwg like the forge unit will get rid of it. A 3 port ebcs may help with it as well.
None of those will get rid of it or help. The flutter is caused by the PWM-controlled EBCS. Nothing outside of switching to a completely different boost control system (ala MBC) would get rid of it. An EWG would just make it sound even more ridiculous.
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Old 10-30-2012, 07:07 PM   #5
veel86
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okay thank you for all of your posts i won't mess with anything as long as the flutter doesn't cause any problems mine doesn't effect me achieving full boost. Should i be concerned with the flutter?
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Old 10-30-2012, 07:13 PM   #6
veel86
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i don't understand what PWM stands for though. Can you explain?
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Old 10-30-2012, 09:17 PM   #7
the suicidal eggroll
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There's nothing to be concerned about, it's just the noise the wastegate makes. You're not concerned that your blinker makes a clicking noise, or your windshield wipers make a sliding noise, right? Same deal.

PWM = pulse width modulated. It means the boost control solenoid is rapidly pulsed. The longer it's open during each pulse, the more pressure it bleeds off to the intake and the more boost you run. The shorter it's open during each pulse, the more pressure makes it to the wastegate, and the less boost you run. This rapid on/off pulsing causes the wastegate flapper to rapidly open and close, which you hear as a fluttering. You don't really hear it on a stock car because the factory downpipe and its multitude of "brick-wall" cats quiet it down, while the aftermarket downpipe lets it resonate. Just like the BPV noise and a stock vs aftermarket intake. The aftermarket intake doesn't affect the sound the BPV makes, you can just hear it better because the sound is allowed to resonate and doesn't get dampened out as much.
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Old 10-31-2012, 10:42 AM   #8
Tripintaz
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Take the turbo off the car or get used to it.

PS- a 3 port EBCS will cause MORE audible flutter.
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Old 10-31-2012, 12:39 PM   #9
nate_fisher
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My bad i thought a stiffer spring would help i used to have the wastegate flutter on my td04 and hated it so much i swapped to a vf52 and have not had any unplesent noise since. I was not aware the vf39 did it as well but i dont get much noise from the vf52.
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Old 10-31-2012, 01:25 PM   #10
the suicidal eggroll
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The flutter on my vf52 is hella loud, just like it was on the vf39 on my 05.
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Old 10-31-2012, 01:53 PM   #11
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Yea i dont hear it on my vf52 the td04 was so bad once i put on my downpipe i couldnt even enjoy it. It sounded like the car was broken up to 7psi or so almost like a exhaust leak tick it drove me nuts. But once i floored it it went away but for regular driving it was unbearable. All i hear from the vf is whistle and spool up sounds no mre anoying tick. I always was under the impression that a stiffer spring would keep it more steady but i guess im wrong. The 3 port did not fix it on my td04 and if you can live with the noise it wont hurt anything.
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Old 10-31-2012, 04:03 PM   #12
Tripintaz
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My vf52 makes all sorts of fluttering noises but only when it is trying to regulate boost at part throttle. At WOT I hardly hear any flutter.
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