FLUTTER sound as BOV

[ATTN]

how do i get the Flutter sound on my s2 gtst?

i was at a wrecker and this guy came down changing gears letting off this cool flutter sound into the atmosphere

i asked the guy how he did it but he did go into much detail i guess he want to keep it a secert

he briefly said that he blocked off the BOV and he asked if i had a aftermarket air filter, he said thats all i needed to get that sound

i really wanted the flutter sound because it sounded MAD

i want to know if anyone knew how to do this?

[YOYO]

Tighten or remove your BOV. It also helps heaps if you have a FMIC, as the sound resonates in the end tanks.

[geno8r]

Yep, have a pod & tighter BOV

[ScottKing GTS-4]

Remove the stock BOV - get an empty can of beer and cut a gasket out of the can the shape of the BOV, but DONT cut a whole in the gasket for the air to flow through and then mount the gasket back onto the BOV. You get no blow-by to the BOV so the "flutter" you hear is the waste-gate venting itself.

[LowRollaBoy]

Its not the wastegate venting itself.

Its just comp surge, reverberating back thru the turbo , fmic, and out the pod... which otherwise would of gone straight out the BOV.

[gazza]

will that harm the turbo im any way?

[geno8r]

will that harm the turbo im any way?

Nar.... Not at low psi... If you were boosting 10 pound & that still wasnt opening the BOV well then u might be doing some damage.

[gazza]

ahh ok

[GTS-032]

it will slowly wear the turbo on any boost but really i dont think it would do any major damage or wear it substaintally at all.

anyway flutter sounds mad so just do it !!!!

[geno8r]

Actually when i think about DONT TIGHTEN YOUR BOV, fluttering is EXTREMELY bad for your turbo..... *im sick of everybody having fluttering bovs these days, I used to be the only one!!!:wassup: Thats the problem with being a trendsetter, you get too many trendwhores...*

[krzysiu]

Shit i flutter ONLY when i run 17 pounds of boost and drive hard, on 10 pounds i couldnt make it flutter if i tried. This is without modifing the BOV as it is still stock.

[geno8r]

Shit i flutter ONLY when i run 17 pounds of boost and drive hard, on 10 pounds i couldnt make it flutter if i tried. This is without modifing the BOV as it is still stock.

Sh!t hmmmmmm ummmmm this might be because at 10 psi the stock BOV is big enough flow out that much air, but at 17 psi there is much more air and while the stock BOV is venting there is still excess air which goes back out through your compressor... My advice... get a high flowing BOV or two!!

[Tigger]

How does one go about tightening the stock BOV?

Cheers

[stÖrmy]

Wait i thought it was just a better type of BOV that produced this flutter sound, I was told that the BOV's that make this sound are alot better then the standard types, But is the only difference the sound it makes?

[geno8r]

How does one go about tightening the stock BOV?

Cheers

You dont.

[geno8r]

Wait i thought it was just a better type of BOV that produced this flutter sound, I was told that the BOV's that make this sound are alot better then the standard types, But is the only difference the sound it makes?

THE ACTUAL BOV DOESNT MAKE THAT FLUTTERING SOUND... gezzzzz dammit ppl..... That sound is when air returns back through your intercooler piping & back out through your turbo compressor. This flutter sound is the turbo 'chopping' up the air trying to push it through the piping but the air is returning so it chops up the air & creates that 'flutter' noise. This will occur when there is no BOV, or a too tight of a BOV & you slam the throttle shut after boosting. Oww & it’s not good for your turbo because it can slow your turbo down rapidly and create excess strain & wear, so don’t be trendwhores & forget the flutter.

[GunMetalR33]

I heard somewhere that if you tap the top casing of the stock bov down with a hammer it will pre-load the spring a little and make it tighter. Does any one see this working???

[JCMarshall_Law]

I suggest those about to reply to this thread should read this first, it is exactly the same thread, but a lot more debate had gone on.

http://www.skylinesaustralia.com/forums/sh...+sound+as+a+BOV

[krzysiu]

Sh!t hmmmmmm ummmmm this might be because at 10 psi the stock BOV is big enough flow out that much air, but at 17 psi there is much more air and while the stock BOV is venting there is still excess air which goes back out through your compressor... My advice... get a high flowing BOV or two!!

Yeah my next plan would be to fit twin gt-r bov's (stock ones, plumb back) USed to have a HKS SSQV, and ive whinged many times about the stalling, so got rid of it.

[Col-GTSX]

Just get a pod and you willo get a little flutter...

If this is not enought then yeah tighter BOV...

I use a HKS SSQV, it will only open above .5 bar anything under that flutters back threw the pod...